Model No. 831.159831
Serial No.
USER’S MANUAL
The serial number is found in the
location shown below. Write the
serial number in the space above.
Serial
Number
Decal
Patent Pending
SEARS, ROEBUCK AND CO.
HOFFMAN ESTATES, IL 60179
CAUTION
Read all precautions and instruc-
tions in this manual before using
this equipment. Save this manu-
al for future reference.
Visit our website at
new products, prizes,
fitness tips, and much more!
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IMPORTANT PRECAUTIONS
WARNING: To reduce the risk of serious injury, read the following important precautions
before using the weight system.
1. Read all instructions in this manual and in
the accompanying literature before using the
weight system.
11. Never release the press arm, butterfly arms,
leg lever, press plate, lat bar, ab strap, or
nylon strap while weights are raised; the
weights will fall with great force.
2. It is the responsibility of the owner to ensure
that all users of the weight system are ade-
quately informed of all precautions.
12. Always disconnect the lat bar from the
weight system when performing an exercise
that does not use the lat bar.
3. The weight system is intended for home use
only. Do not use the weight system in any
commercial, rental, or institutional setting.
13. Make sure that the cables remain on the pul-
leys at all times. If the cables bind while you
are exercising, stop immediately and make
sure that the cables are on all of the pulleys.
4. Use the weight system only on a level sur-
face. Cover the floor beneath the weight sys-
tem to protect the floor.
14. If you feel pain or dizziness at any time while
exercising, stop immediately and begin cool-
ing down.
5. Make sure all parts are properly tightened
each time you use the weight system.
Replace any worn parts immediately.
15. The decal shown here
has been placed on the
weight system in the
location shown on page
4. If the decal is missing
or illegible, please call
our toll-free HELPLINE at
the number on the front
cover of this manual to
order a replacement
decal. Apply the new
decal in the indicated
location.
6. Keep children under 12 and pets away from
the weight system at all times.
7. Keep hands and feet away from moving parts.
8. Always wear athletic shoes for foot protection.
9. The weight system is designed to support a
a maximum user weight of 250 pounds.
10. Always stand on the foot plate when per-
forming an exercise that could cause the
weight system to tip.
WARNING:
Before beginning this or any exercise program, consult your physician. This
is especially important for persons over the age of 35 or persons with pre-existing health problems.
Read all instructions before using. SEARS assumes no responsibility for personal injury or property
damage sustained by or through the use of this product.
3
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BEFORE YOU BEGIN
Thank you for selecting the innovative and versatile
WEIDER® PRO POWER STACK weight system. The
POWER STACK offers a unique selection of weight
stations designed to develop every major muscle
group of the body. Whether your goal is to tone your
body, build dramatic muscle size and strength, or
improve your cardiovascular system, the POWER
STACK will help you to achieve the results you want.
have additional questions, please call our toll-free
HELPLINE at 1-800-736-6879, Monday through
Saturday, 7 a.m. until 7 p.m. Central Time (excluding
holidays). To help us assist you, please note the prod-
uct model number and serial number before calling.
The model number is 831.159831. The serial number
can be found on a decal attached to the weight system
(see the front cover of this manual).
For your benefit, read this manual carefully before
using the POWER STACK weight system. If you
Please use the drawing below to familiarize your-
self with the major parts and how they fit together.
ASSEMBLED
DIMENSIONS:
Height: 77 in.
Width: 80 in.
Depth: 55 in.
Butterfly Arm
Ab Pulley
Station
High Pulley
Station
Backrest
Curl Pad
Lat Bar
Warning
Decal
Seat
Backrest
Weight Stack
Leg Lever
Press Arm
Seat
Low Pulley
Station
Foot Plate
Leg Press Lever
Leg Press
4
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ASSEMBLY
Make sure you have the following tools:
• Two adjustable wrenches
Make Assembly Easier for Yourself
Everything in this manual is designed to
ensure that the weight system can be assem-
bled successfully by anyone. Before begin-
ning assembly, make sure to read the
information on this page. This brief intro-
duction will save you much more time than
it takes to read it.
• One standard screwdriver
• One phillips screwdriver
• One rubber mallet
• You will also need grease or petroleum jelly, a
small amount of soapy water, and clear tape or
masking tape.
Assembly Requires Two Persons
Note: Assembly will be more convenient if you have
a socket set, a set of open-end or closed-end
wrenches, or a set of ratchet wrenches.
For your convenience and safety, assemble the
weight system with the help of another person.
Set Aside Enough Time
How to Identify Parts
Due to the many features of the weight system, the
assembly process will require several hours. By
setting aside plenty of time and by deciding to
make the task enjoyable, assembly will go smoothly.
You may want to assemble the weight system over
a couple of evenings.
To help you identify the small parts used in assembly,
we have included a PART IDENTIFICATION CHART
in the center of this manual. Place the chart on the
floor and use it to easily identify parts during each
assembly step. Note: Some small parts may have
been pre-attached. If a part is not in the parts
bag, check to see if it has been pre-attached.
Select a Location for the Weight System
How to Orient Parts
Because of its weight and size, the weight system
should be assembled in the location where it will be
used. Make sure that there is enough room to walk
around the weight system as you assemble it.
As you assemble the weight system, make sure that
all parts are oriented exactly as shown in the draw-
ings.
Tightening Parts
How to Unpack the Box
Tighten all parts as you assemble them, unless
instructed to do otherwise.
To make assembly as easy as possible, we have
divided the assembly process into four stages. The
parts needed for each stage are found in individual
bags. Important: Wait until you begin each stage
to open the parts bag for that stage. Place all
parts of the weight system in a cleared area and
remove the packing materials. Do not dispose of
the packing materials until assembly is completed.
Questions?
If you have questions after reading the assembly
instructions, please call our toll-free HELPLINE at
1-800-736-6879, Monday through Saturday, 7 a.m.
until 7 p.m. Central Time (excluding holidays).
The Four Stages of the Assembly Process
Frame Assembly—You will begin by assembling
the base and the uprights that form the skeleton of
the weight system.
Cable Assembly—During this stage you will
attach the cables and pulleys that connect the
arms to the weights.
Arm Assembly—During this stage you will
Seat Assembly—During the final stage you will
assemble the arms and the leg lever.
assemble the seats and the backrests.
5
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1
Frame Assembly
1. Before beginning, be sure that you have read
and understood the information on page 5.
67
Locate and open the parts bag labeled
“FRAME ASSEMBLY.”
1
95
Press a 2” Square Inner Cap (67) into each end
of the Butterfly Base (1).
75
75
Insert four 5/16” x 2 1/2” Carriage Bolts (75) and a
a 3/8” x 3 1/2” Carriage Bolt (95) up through the
indicated holes in the Butterfly Base (1). Place the
Butterfly Base flat on the floor. Note: If the Bolts
fall out, secure them by putting a small piece of
tape over the head of each Bolt.
67
2. Press three 2” Square Inner Caps (67) into the
Center Base (2). Insert a 3/8” x 3 1/2” Carriage
Bolt (95) up through the indicated hole in the
Center Base.
2
89
109
Attach the Center Base (2) to the Butterfly Base (1)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon Locknuts
(86). Do not tighten the Nylon Locknuts yet.
86
67
86
Note: There are three kinds of Support Plates.
The main difference between them is the dis-
tance between the holes. When you need a
Support Plate, find the kind with holes that
will fit over the bolts you are using.
1
2
95
3. Press a 2” Square Inner Cap (67) into the end of
the Press Base (3).
3
Insert four 5/16” x 2 1/2” Carriage Bolts (75) up
through the indicated holes in the Press Base (3).
Insert a 3/8” x 2 1/2” Carriage Bolt (76) and a 3/8”
x 4” Carriage Bolt (112) up through the indicated
holes at the end of the Press Base.
86
67
2
3
Attach the Press Base (3) to the Center Base (2)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon Locknuts
(86). Do not tighten the Nylon Locknuts yet.
109
86
89
112
75
76
75
6
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4. Slide the Butterfly Upright (4) over the indicated
5/16” x 2 1/2” Carriage Bolts (75) in the Butterfly
Base (1). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
4
4
86
75
86
1
5. Press three 2” Square Inner Caps (67) into the
Butterfly Top Frame (7). Press two Round Inner
Caps (63) into the top of the Butterfly Top Frame.
5
89
109
Attach the Butterfly Top Frame (7) to the indicat-
ed bracket at the top of the Butterfly Upright (4)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon
Locknuts (86).
63
67
67
63
67
7
86
4
6. Press a 2” Square Inner Cap (67) halfway into the
top of the Butterfly Leg (11). Attach a Bumper (50)
to the Butterfly Leg with a 1” Tap Screw (80).
6
67
86
Attach the Butterfly Seat Frame (10) to the
Butterfly Leg (11) with two 5/16” x 2 3/4” Bolts
(89), two 5/16” Washers (100), and two 5/16”
Nylon Locknuts (86). Do not tighten the Nylon
Locknuts yet.
10
100
100
86
89
80
11
50
7
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7. Slide the Butterfly Leg (11) onto the two 5/16” x
2 1/2” Carriage Bolts (75) in the Butterfly Base
(1). Hand tighten two 5/16” Nylon Locknuts (86)
onto the Bolts.
7
86
89
10
86
Attach the Butterfly Seat Frame (10) to the
Butterfly Upright (4) with two 5/16” x 2 3/4” Bolts
(89), two 5/16” Washers (100), and two 5/16”
Nylon Locknuts (86).
100
11
4
86
86
Do not tighten the 5/16” Nylon Locknuts (86)
yet.
75
8. Press a 1” Square Inner Cap (69) into the small
tube on the Press Upright (5).
8
Slide the Press Upright (5) over the indicated
5/16” x 2 1/2” Carriage Bolts (75) in the Press
Base (3). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
5
Slide the Upright Support (6) over the 3/8” x
2 1/2” Carriage Bolt (76) and the 3/8” x 4”
Carriage Bolt (112) in the Press Base (3). Hand
tighten a 3/8” Nylon Jamnut (92) onto the 3/8” x
2 1/2” Carriage Bolt. Do not tighten the Nylon
Jamnut yet. Note: Do not thread a Nylon
Jamnut onto the 3/8” x 4” Carriage Bolt yet.
86
86
6
75
Attach the Upright Support (6) to the Press
Upright (5) with two 5/16” x 2 1/2” Carriage Bolts
(75) and two 5/16” Nylon Locknuts (86). Do not
tighten the Nylon Locknuts yet.
92
86
69
86
112
76
3
75
89
9. Press a 2” Square Inner Cap (67) into the Press
Seat Frame (12). Attach a Bumper (50) to the
Press Seat Frame with a 1” Tap Screw (80).
9
86
12
Slide the Press Seat Frame (12) onto the indicat-
ed 5/16” x 2 1/2” Carriage Bolts (75) in the Press
Base (3). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
89
67
100
50
80
5
86
86
Attach the Press Seat Frame (12) to the Press
Upright (5) with two 5/16” x 2 3/4” Bolts (89), two
5/16” Washers (100), and two 5/16” Nylon
Locknuts (86). Do not tighten the Nylon
Locknuts yet.
3
75
8
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10. Press a 2” Square Inner Cap (67) into the Press
Top Frame (9).
10
89
67
Attach the Press Top Frame (9) to the indicated
bracket at the top of the Press Upright (5) with
two 5/16” x 2 3/4” Bolts (89), a Medium Support
Plate (109), and two 5/16” Nylon Locknuts (86).
Do not tighten the Nylon Locknuts yet.
109
9
5
86
11. Identify the Left Weight Guides (27), which have
welded rings near the bottom. Slide two Weight
Bumpers (46) onto the Left Weight Guides. Note:
The wide end of the Weight Bumpers must be
on bottom. Insert the Left Weight Guides into the
indicated holes in the Center Base (2).
11
Set the other two Weight Bumpers (46) over the
indicated holes in the Center Base (2). Note: The
wide end of the Weight Bumpers must be on
bottom. Insert the Right Weight Guides (26)
through the Weight Bumpers and into the holes in
the Center Base.
27
26
Welded
Rings
46
2
12. Attach the indicated Weight Guides (26, 27) to
the Center Base (2) with two 3/8” x 2 3/4” Bolts
(82), four 3/8” Washers (97), and two 3/8” Nylon
Locknuts (90).
12
26
27
90
90
97
97
82
2
82
9
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13. Slide six Weights (41) onto the Right Weight
Guides (26). Make sure the Weights are turned
so the pin grooves are on the bottom.
13
Press a Weight Tube Bumper (45) into the lower
end of the Short Weight Tube (44). Slide the
Short Weight Tube into the center holes in the
Weights (41).
26
42
Slide a Top Weight (42) onto the Right Weight
Guides (26). Note: Make sure the Top Weight is
turned so the groove fits over the welded pin
on the Short Weight Tube (44).
Welded
Pin
44
41
45
Pin
Grooves
14. Slide the Bottom Weight (47) and seven Weights
(41) onto the Left Weight Guides (27). Make sure
the Weights are turned so the pin grooves are
on the bottom.
14
27
Press a Weight Tube Bumper (45) into the lower
end of the Long Weight Tube (43). Slide the Long
Weight Tube into the center holes in the Weights
(41).
42
Welded
Pin
Slide the other Top Weight (42) onto the Left
Weight Guides (27). Note: Make sure the Top
Weight is turned so the groove fits over the
welded pin on the Long Weight Tube (43).
43
45
41
Pin
Groove
47
10
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15. Press a 2” Square Inner Cap (67) into the Center
Top Frame (8). Place the Center Top Frame on
the indicated brackets on the Uprights (4, 5).
Note: The tops of the four Weight Guides (26,
27) must be behind the Center Top Frame, as
shown in step 16.
15
82
28
90
67
90
82
Attach the Center Top Frame (8) to the Butterfly
Top Frame (7) with two 3/8” x 2 3/4” Bolts (82), a
Large Support Plate (29), and two 3/8” Nylon
Locknuts (90). Do not tighten the Nylon
Locknuts yet.
8
29
7
92
26
4
Attach the Center Top Frame (8) to the bracket on
the Butterfly Upright (4) with two 3/8” x 2 3/4”
Bolts (82), a Small Support Plate (28), and two
3/8” Nylon Jamnuts (92). Do not tighten the
NylonLocknuts yet.
5
27
16. Attach the Center Top Frame (8) to the rear hole in
the Press Top Frame (9) with a 3/8” x 2 3/4” Bolt
(82), a Large Support Plate (29), and a 3/8” Nylon
Locknut (90). Do not tighten the Locknut yet.
16
82
8
Locate the parts bag labeled “PULLEY BAG
1.” Remove a 3 1/2” Pulley (35) from the bag.
28
90
92
29
Slide a 3 1/2” Pulley (35) and a Cable Trap (38)
onto a 3/8” x 4” Bolt (78). Slide the Bolt through the
Large Support Plate (29) and Press Top Frame (9),
and hand tighten a 3/8” Nylon Locknut (90) onto it.
90
82
35
78
38
Attach the Center Top Frame (8) to the bracket on
the Press Upright (5) with two 3/8” x 2 3/4” Bolts
(82), a Small Support Plate (28), and two 3/8”
Nylon Jamnuts (92). Do not tighten the Nylon
Locknuts yet.
9
5
17. Attach each set of Weight Guides (26, 27) to the
Center Top Frame (8) with two 3/8” x 3 3/4” Bolts
(101), two 3/8” SAE Washers (113), and two 3/8”
Nylon Locknuts (90).
17
90
8
90
113
Tighten the 3/8” Nylon Locknuts (90), the
5/16” Nylon Locknuts (86), and the 3/8” Nylon
Jamnut (92) used in steps 2–17.
101
101
26
27
11
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18
92
11
Arm Assembly
67
18. Locate and open the parts bag labeled “ARM
104
ASSEMBLY.”
Press two 2” Square Inner Caps (67) into the
ends of the Leg Lever (13).
13
Lubricate
Lubricate a 3/8” x 3 1/4” Bolt (104). Attach the
Leg Lever (13) to the Butterfly Leg (11) with the
Bolt and a 3/8” Nylon Jamnut (92). Do not over-
tighten the Nylon Jamnut; the Leg Lever must
be able to pivot easily.
67
19. Lubricate the 3/8” x 3” Bolt (88). Attach the Leg
Press Lever (14) to the Press Base (3) with the
Bolt and a 3/8” Nylon Locknut (90). Do not over-
tighten the Nylon Locknut; the Leg Press
Lever must pivot easily.
19
14
Lubricate
88
3
90
20. See the inset drawing. Press a Plastic Bushing
(60) onto each welded tube on the Press Frame
(17). Slide the Press Frame into place on the
Press Base (3). Note: This will be a tight fit.
The Plastic Bushings should fit onto each end
of the welded tubes in the Base.
20
106
17
Lubricate the 3/8” x 8” Bolt (106). Attach the
Press Frame (17) to the Press Base (3) with the
Bolt and a 3/8” Nylon Jamnut (92). Do not over-
tighten the Nylon Jamnut; the Press Frame
must pivot easily.
3
17
92
Lubricate
60
21. Press a 1 3/4” Square Inner Cap (68) into the top
of a Press Arm (18). Press a 1” Round Inner Cap
(66) into the Press Arm.
21
18
Attach the Press Arm (18) to the Press Frame
(17) with two 5/16” x 2 1/2” Bolts (87) and two
5/16” Nylon Locknuts (86).
68
Repeat this step with the other Press Arm (18).
87
18
66
86
17
12
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22. Identify the Right and Left Butterfly Arms (19, 20)
by the positions of the welded brackets.
22
Bracket
7
Lubricate
Axles
Press a 1 3/4” Square Inner Cap (68) into each
end of the Right Butterfly Arm (19). Wet the lower
end of the Butterfly Arm with soapy water. Slide a
Large Foam Pad (53) onto the lower end of the
Butterfly Arm.
Welded
Brackets
Lubricate the axles on the Butterfly Top Frame
(7). Orient the Right Butterfly Arm (19) as shown
and slide it onto the right axle. Have a second
person secure the Butterfly Arm with two 1”
Retainers (54) and a 1” Cover Cap (55). Note:
Place the Retainers on top of the inverted
Cover Cap. Make sure the teeth on the
Retainers bend toward the Cover Cap, as
shown in the inset drawing. Gently tap the
Cover Cap onto the axle with a hammer.
68
54
19
55
20
53
68
Repeat this step with the Left Butterfly Arm (20).
Axle
54
Teeth
55
23
Cable Assembly
23. Locate and open the parts bag labeled
“CABLE ASSEMBLY.” For cable identification
and routing during steps 23 to 61, refer to the
CABLE DIAGRAMS and CABLE ID CHART on
pages 30 and 31.
77
Bracket
20
Identify the Butterfly Cable (73). It is approxi-
mately 52” long and it has an eyelet on each end.
Attach the Butterfly Cable to the bracket on the
Left Butterfly Arm (20) with a 5/16” x 1” Shoulder
Bolt (84) and a 5/16” Nylon Jamnut (77).
73
84
24
24. Locate and open the parts bag labeled
“PULLEY BAG 2.” Remove one “V”-Pulley (34)
from the bag. Leave the remaining pulleys in
the bag for identification of the Pro Pulleys.
37
34
Wrap the Butterfly Cable (73) around a “V”-Pulley
(34) in the direction shown. Attach the Pulley and
a Long Cable Trap (37) to the bracket on the
back of the Butterfly Upright (4) with a 3/8” x
2 1/2” Bolt (105) and a 3/8” Nylon Locknut (90).
Make sure the Long Cable Trap is oriented as
shown.
90
73
105
4
13
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25. Remove the 3 1/2” Pulleys (35) from the Double
“U”-Bracket (31).
25
Wrap the Butterfly Cable (73) around a 3 1/2”
Pulley (35). Attach the Pulley to the Double “U”-
Bracket (31) with a 3/8” x 1 3/4” Bolt (94) and a
3/8” Nylon Locknut (90).
73
94
90
35
31
26. Remove another “V”-Pulley (34) from the bag
26
labeled “PULLEY BAG 2.”
105
34
37
Wrap the Butterfly Cable (73) around the “V”-
Pulley (34) in the direction shown. Attach the
Pulley and a Long Cable Trap (37) to the bracket
on the back of the Butterfly Upright (4) with a
3/8” x 2 1/2” Bolt (105) and a 3/8” Nylon Locknut
(90). Make sure the Long Cable Trap is orient-
ed as shown.
73
90
4
27. Attach the Butterfly Cable (73) to the bracket on
the Right Butterfly Arm (19) with a 5/16” x 1”
27
77
Shoulder Bolt (84) and a 5/16” Nylon Jamnut (77).
19
73
84
28. Identify the Rear Cable (70). It is approximately
95 1/8” long, and it has an eyelet on one end and
a threaded shaft on the other.
28
90
97
8
97
Attach the eyelet on the Rear Cable (70) inside
the Center Top Frame (8) with a 3/8” x 2 3/4” Bolt
(82), two 3/8” Washers (97), and a 3/8” Nylon
Locknut (90).
82
70
14
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29. Remove the 3 1/2” Pulleys (35) from a pair of pre-
assembled Pulley Plates (32).
29
Wrap the Rear Cable (70) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the top hole in the pair of
Pulley Plates (32) with a 3/8” x 2” Bolt (93) and a
3/8” Nylon Locknut (90). Make sure the Cable
Trap is positioned to hold the Cable in the
groove of the Pulley.
70
93
32
35
38
90
32
30. Wrap the Rear Cable (70) around a 4 1/2” Pulley
(36) in the direction shown. Attach the Pulley
inside the indicated bracket on the Center Top
Frame (8) with a 3/8” x 1 3/4” Bolt (94) and a 3/8”
Nylon Locknut (90).
30
Bracket
90
36
94
8
70
31. Attach the end of the Rear Cable (70) to a “U”-
Bracket (33) with a 1/4” Washer (99) and a 1/4”
Nylon Locknut (103).
31
Attach the “U”-Bracket (33) to the Short Weight
Tube (44) with a 5/16” x 1 3/4” Bolt (96) and a
5/16” Nylon Locknut (86).
70
96
33
86
99
103
44
32. Identify the Ab Cable (74). It is approximately
226 1/2” long, and it has a ball on one end and
an eyelet on the other.
32
Large tabs
on this side
97
92
Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) as shown. Place two Pulley Covers (39) over
the Pulley, so that the large tabs are on the side
shown. Attach the Pulley and Pulley Covers to the
Butterfly Upright (4) with a 3/8” x 3 3/4” Bolt
(101), two 3/8” Washers (97), and a 3/8” Nylon
Jamnut (92). Make sure the Cable is between
the Pulley and the pin on the Upright.
39
Pin
39
101
4
35
97
74
15
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33. Remove the 3 1/2” Pulleys (35) from the other
pair of pre-assembled Pulley Plates (32).
33
Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the top hole in the pair of
Pulley Plates (32) with a 3/8” x 2” Bolt (93) and a
3/8” Nylon Locknut (90). Make sure the Cable
Trap is positioned to hold the Cable in the
groove of the Pulley.
74
93
32
90
32
35
38
34. Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley to
the Double “U”-Bracket (31) with a 3/8” x 1 3/4”
Bolt (94) and a 3/8” Nylon Locknut (90).
34
94
31
90
35
74
35. Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the indicated bracket on the
Butterfly Base (1) with a 3/8” x 2” Bolt (93) and a
3/8” Nylon Locknut (90). Make sure the Cable
Trap is positioned to hold the Cable in the
groove of the Pulley.
35
74
93
35
38
1
90
36. Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Slide a Cable Trap
(38) and the Pulley onto the 3/8” x 3 1/2” Carriage
Bolt (95) in the Butterfly Base (1). Secure the
Pulley with a 3/8” Nylon Jamnut (92). Make sure
the Cable Trap is positioned to hold the Cable
in the groove of the Pulley.
36
92
35
38
74
1
95
16
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37. Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley to
the indicated bracket on the Center Base (2) with
a 3/8” x 3 3/4” Bolt (101) and a 3/8” Nylon
Locknut (90). Make sure the Cable is routed in
the direction shown.
37
74
35
101
Note: The 3/8” x 3 3/4” Bolt (101) must be
inserted through both brackets on the Center
Frame (2). Tighten the 3/8” Nylon Locknut (90)
only a few turns onto the Bolt; it will need to
be removed in step 39.
2
90
38. Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the forth set of holes from
the bottom in the indicated pair of Pulley Plates
(32) with a 3/8” x 2” Bolt (93) and a 3/8” Nylon
Locknut (90). Make sure the Cable Trap is posi-
tioned to hold the Cable in the groove of the
Pulley.
38
32
90
93
35
38
74
39. Remove the 3/8” x 3 3/4” Bolt (101) and the 3/8”
Nylon Locknut (90) used in step 37.
39
Wrap the Ab Cable (74) around a 3 1/2” Pulley (35)
in the direction shown. Attach the Pulley to the indi-
cated bracket on the Center Base (2), and the
3 1/2” Pulley (35) used in step 37 to its bracket,
with the 3/8” x 3 3/4” Bolt (101) and the 3/8” Nylon
Locknut (90). Note: Make sure the Pulley used
in step 37 is attached as shown.
35
101
92
35
74
90
38
35
95
2
Wrap the Ab Cable (74) around a 3 1/2” Pulley
(35) in the direction shown. Slide the Pulley and a
Cable Trap (38) onto the 3/8” x 3 1/2” Carriage
Bolt (95) in the Center Base (2). Secure the
Pulley with a 3/8” Nylon Jamnut (92). Make sure
the Cable Trap is positioned to hold the Cable
in the groove of the Pulley.
40
35
40. Lay the Ab Cable (74) inside the indicated bracket
on the Center Base (2). Attach a 3 1/2” Pulley
(35) inside the bracket with a 3/8” x 1 3/4” Bolt
(94) and a 3/8” Nylon Jamnut (92).
94
92
Bracket
2
74
17
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41. Locate the Weight Plate (48) that is attached
41
to the bottom of the Bottom Weight (47).
86
See the inset drawing. Attach the end of the Ab
Cable (74) to the bottom of the Weight Plate (48)
with a 5/16” x 1 3/4” Bolt (96) and a 5/16” Nylon
Locknut (86).
48
96
47
74
42. Remove a Pro Pulley (110) from the bag
42
labeled “PULLEY BAG 2.”
Identify the Low Cable (71). It is approximately
142 1/8” long and it has a ball on one end and an
eyelet on the other. Route the eyelet end through
the slot in the cable guide on the Butterfly Base
(1).
93
110
38
Route the Low Cable (71) under the Pro Pulley
(110). Attach the Pro Pulley and a Cable Trap
(38) to the bracket on the Butterfly Base (1) with
a 3/8” x 2” Bolt (93) and a 3/8” Nylon Locknut
(90). Make sure the Cable Trap is positioned to
hold the Cable in the groove of the Pulley.
71
90
1
Cable
Guide
43. Wrap the Low Cable (71) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the indicated hole in the
Butterfly Upright (4) with a 3/8” x 4 3/4” Bolt (102)
and a 3/8” Nylon Jamnut (92). Note: Thread the
Jamnut only two turns onto the Bolt, another
Pulley will be attached to the Bolt in step 45.
Make sure the Cable Trap is positioned to
hold the Cable in the groove of the Pulley.
43
102
35
71
38
92
4
44. Wrap the Low Cable (71) over a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the forth set of holes from
the bottom in the Pulley Plates (32) with a 3/8” x
2” Bolt (93) and a 3/8” Nylon Locknut (90). Make
sure the Cable Trap is positioned to hold the
Cable in the groove of the Pulley.
44
32
90
93
35
38
71
18
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45. Remove the 3/8” Nylon Jamnut (92) from the
3/8” x 4 3/4” Bolt (102) inserted into the Butterfly
Upright (4) in step 43.
45
71
Wrap the Low Cable (71) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the 3/8” x 4 3/4” Bolt (102)
with the 3/8” Nylon Jamnut (92). Make sure the
Cable Trap is positioned to hold the Cable in
the groove of the Pulley.
4
38
102
35
92
46. Attach the Low Cable (71) to the Leg Lever (13)
with a 5/16” x 2 3/4” Shoulder Bolt (108), a 5/16”
Washer (100), and a 5/16” Nylon Jamnut (77).
46
100
77
13
108
71
47. Remove a Pro Pulley (110) from the bag
47
labeled “PULLEY BAG 2.”
97
92
Identify the Press Cable (72). It is approximately
387 5/8” long and it has a ball on one end and a
threaded shaft on the other.
9
Wrap the Press Cable (72) around the Pro Pulley
(110) in the direction shown. Attach the Pulley to
the Press Top Frame (9) with a 3/8” x 3 1/2” Bolt
(111), a 3/8” Washer (97), and a 3/8” Nylon
Jamnut (92). Make sure the Cable is between
the Pulley and the pin on the Press Top
Frame.
Pin
72
111
110
48. Route the threaded end of the Press Cable (72)
around the 3 1/2” Pulley (35) that was attached to
the Press Top Frame (9) in step 16. Make sure
the Cable Trap (38) is positioned to hold the
Cable in the groove of the Pulley. Properly
tighten the 3/8” Nylon Locknut (not shown)
attached to the 3/8” x 4” Bolt (78).
48
38
35
78
9
72
19
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49. Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the indicated hole in the
Press Upright (5) with a 3/8” x 3 3/4” Bolt (101), a
3/8” Washer (97) and a 3/8” Nylon Locknut (90).
Make sure the Cable Trap is positioned to hold
the Cable in the groove of the Pulley.
49
90
97
35
101
38
5
50. Route the Press Cable (72) through the opening
in the Press Frame (17) and wrap the Cable
around a 3 1/2” Pulley (35) in the direction
shown.
50
72
90
Attach the 3 1/2” Pulley (35) and a Cable Trap
(38) to the indicated hole in the Press Frame (17)
with a 3/8” x 3 1/4” Bolt (104), a 3/8” Washer (97)
and a 3/8” Nylon Locknut (90). Make sure the
Pulley is attached on the inside of the Press
Frame. Make sure the Cable Trap is positioned
to hold the Cable in the groove of the Pulley.
35
38
97
104
17
51. Wrap the Press Cable (72) around a “V”-Pulley
(34) in the direction shown. Attach the Pulley and
a Long Cable Trap (37) to the small tube on the
Press Upright (5) with a 3/8” x 3 1/4” Bolt (104), a
3/8” Washer (97) and a 3/8” Nylon Locknut (90).
Note: The small tube has four adjustment
holes. Attach the “V”-Pulley in the hole far-
thest from the Upright. Make sure the Cable
Trap is oriented as shown.
51
90
97
72
5
34
37
104
52. Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley to
the indicated hole in the Press Frame (17) with a
3/8” x 3 1/4” Bolt (104), a 3/8” Washer (97), and a
3/8” Nylon Locknut (90). Make sure the Pulley is
attached on the inside of the Press Frame.
Make sure the Cable Trap is positioned to
hold the Cable in the groove of the Pulley.
52
104
72
97
38
35
90
17
20
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53. Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Attach the Pulley and
a Cable Trap (38) to the indicated hole on the
right side of the Press Upright (5) with a 3/8” x 4
3/4” Bolt (102) and a 3/8” Nylon Jamnut (92).
Note: Thread the Jamnut only two turns onto
the Bolt; another Pulley will be attached to the
Bolt in step 57. Make sure the Cable Trap is
positioned to hold the Cable in the groove of
the Pulley.
53
102
72
92
5
35
38
54. Route the Press Cable (72) through the Press
Frame (17) and around a 3 1/2” Pulley (35) as
shown. Attach the Pulley and a Cable Trap (38) to
the indicated hole on the right side of the Leg
Press Lever (14) with a 3/8” x 4 3/4” Bolt (102)
and a 3/8” Nylon Jamnut (92). Note: Thread the
Jamnut only two turns onto the Bolt; another
Pulley will be attached to the Bolt in step 56.
Make sure the Cable Trap is positioned to hold
the Cable in the groove of the Pulley.
54
102 72
92
35
38
14
55. Wrap the Press Cable (72) around a “V”-Pulley
(34) in the direction shown. Attach the Pulley and
a Long Cable Trap (37) underneath the Press
Seat Frame (12) with a 3/8” x 4 1/4” Bolt (85), a
3/8” Washer (97), and a 3/8” Nylon Locknut (90).
Note: the Press Seat Frame has five adjust-
ment holes. Attach the Pulley to the second
hole from the Leg Press Lever (14). Make sure
the Cable Trap is positioned to hold the Cable
in the groove of the Pulley.
55
85
97
12
38
72
14
34
90
56. Remove the 3/8” Nylon Jamnut (92) used in step
54.
56
Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Slide a Cable Trap
(38) and the Pulley onto the 3/8” x 4 3/4” Bolt
(102) in the Leg Press Lever (14). Properly tight-
en the 3/8” Nylon Jamnut (92) onto the Bolt.
Make sure the Cable Trap is positioned to
hold the Cable in the groove of the Pulley.
14
102
72
92
35
38
21
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57. Remove the 3/8” Nylon Jamnut (92) used in step
53. Route the Press Cable (72) through the Press
Frame (17).
57
Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Slide a Cable Trap
(38) and the Pulley onto the 3/8” x 4 3/4” Bolt
(102) in the bottom of the Press Upright (5).
Properly tighten the 3/8” Nylon Jamnut (92) onto
the Bolt. Make sure the Cable Trap is posi-
tioned to hold the Cable in the groove of the
Pulley.
38
72
5
102
92
35
17
58. Wrap the Press Cable (72) around a 3 1/2” Pulley
(35) in the direction shown. Slide a Cable Trap
(38) and the Pulley onto the 3/8” x 4” Carriage
Bolt (112) in the Press Base (3). Secure the Pulley
with a 3/8” Nylon Jamnut (92). Make sure the
Cable Trap is positioned to hold the Cable in
the groove of the Pulley.
58
72
92
35
38
112
3
59. Lay the Press Cable (72) in the bracket on the
Center Base (2). Attach a 3 1/2” Pulley (35) inside
the bracket with a 3/8” x 1 3/4” Bolt (94) and a
3/8” Nylon Jamnut (92).
59
35
72
94
92
2
60. Wrap the Press Cable (72) around a 4 1/2” Pulley
(36) in the direction shown. Attach the Pulley
inside the indicated bracket on the Center Top
Frame (8) with a 3/8” x 1 3/4” Bolt (94) and a 3/8”
Nylon Locknut (90).
60
72
90
8
36
94
22
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61. Attach the Press Cable (72) to the remaining “U”-
Bracket (33) with a 1/4” Washer (99) and a 1/4”
Nylon Locknut (103). Note: Do not completely
tighten the Nylon Locknut; it should be
threaded only two turns onto the end of the
Cable, as shown in the inset drawing.
61
72
96
33
86
43
99
103
Attach the “U”-Bracket (33) to the Long Weight
Tube (43) with a 5/16” x 1 3/4” Bolt (96) and a
5/16” Nylon Locknut (86).
72
Important: Follow all five cables from end to
end and make sure that they rest in the
grooves of all of the pulleys and that the
cables and the pulleys move smoothly.
103
62
Seat Assembly
79
62. Locate and open the parts bag labeled “SEAT
99
25
ASSEMBLY.”
4
Attach the Butterfly Backrest (25) to the Butterfly
Upright (4) with two 1/4” x 2 1/2” Bolts (79) and
two 1/4” Washers (99).
79
99
63. Insert a 1/4” x 2 1/2” Carriage Bolt (91) through
the center hole in a Seat Plate (30). Attach the
Seat Plate to a Seat (23) with two 1/4” x 3/4” Bolt
(98).
63
23
Insert the 1/4” x 2 1/2” Carriage Bolt (91) into the
indicated hole in the Butterfly Seat Frame (10)
and secure it with a 1/4” Washer (99) and a 1/4”
Nylon Locknut (103). Secure the other end of the
Seat (23) with a 1/4” x 2 1/2” Bolt (79) and a 1/4”
Washer.
91
30
98
Attach the other Seat (23) to the Press Seat
Frame (12, not shown) in the same manner.
99
103
79
64. Insert a 1/4” x 2 1/2” Carriage Bolt (91) through
the center hole in a Seat Plate (30). Attach the
Seat Plate to the Press Backrest (24) with two
1/4” x 3/4” Bolt (98).
64
79
99
99
5
24
Insert the 1/4” x 2 1/2” Carriage Bolt (91) into the
indicated hole in the Press Upright (5) and secure
it with a 1/4” Washer (99) and a 1/4” Nylon
Locknut (103). Secure the other end of the Press
Backrest (24) with a 1/4” x 2 1/2” Bolt (79) and
another 1/4” Washer.
103
98
30
91
23
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65. Press a 1 3/4” Square Inner Cap (68) into the
indicated end of the Adjustment Tube (15).
65
Attach the Adjustment Tube (15) to the bracket
(not visible in the drawing) on the back of the Leg
Press Plate (16) with a 5/16” x 2 1/2” Bolt (87),
two 5/16” Washers (100), and a 5/16” Nylon
Locknut (86).
40
87
15
Lip
100
68
14
86
100
Place the Adjustment Tube (15) in the bracket on
top of the Leg Press Lever (14) and secure it with
the Adjustment Pin (40). Note: The lip on the
Leg Press Plate (16) must be on the upper
edge.
16
66. Press four 3/4” Round Inner Caps (64) into the
ends of the two Pad Tubes (51).
66
64
Insert a Pad Tube (51) into the indicated hole in
the Leg Lever (13). Slide two Foam Pads (52)
onto the ends of the Pad Tube.
52
51
64
Insert a Pad Tube (51) into the indicated hole in
the Butterfly Leg (11). Slide two Foam Pads (52)
onto the ends of the Pad Tube.
52
13
11
64
67. Attach the Curl Pad (22) to the Curl Post (21) with
two 1/4” x 3/4” Bolts (98).
67
98
22
21
68. Make sure that all parts have been properly tightened. The use of the remaining parts will be explained in
ADJUSTMENTS, beginning on the following page.
Before using the weight system, pull each cable a few times to be sure that the cables move smoothly over
the pulleys. If one of the cables does not move smoothly, find and correct the problem. IMPORTANT: If the
cables are not properly installed, they may be damaged when heavy weight is used. See the CABLE
DIAGRAMS on pages 30 and 31 for proper cable routing. If there is any slack in the cables, you will
need to remove it by tightening the cables; see TROUBLESHOOTING AND MAINTENANCE on page
28.
24
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ADJUSTMENTS
The instructions below describe how each part of the weight system can be adjusted. Refer to the exercise
guide accompanying this manual to see how the weight system should be set up for each exercise. IMPOR-
TANT: When using an accessory, make sure it is in the correct starting position for the exercise to be
performed. If there is any slack in the cables or chain as an exercise is performed, the effectiveness of
the exercise will be reduced.
ATTACHING THE ACCESSORIES TO A PULLEY
STATION
Attach the Lat Bar (59) to the Low Cable (71) at the
71
low pulley station with a Cable Clip (58). For some
exercises, the Chain (57) should be attached between
the Lat Bar and the Low Cable with two Cable Clips.
Adjust the length of the Chain between the Lat Bar
and the Low Cable so the Lat Bar is in the correct
starting position for the exercise to be performed.
83
58
57
58
59
The Nylon Strap (83) or Ab Strap (56) can be attached
in the same manner. The accessories can be attached
to the ab pulley station or high pulley station in the
same manner.
56
ADJUSTING THE LEG PRESS PLATE
40
To adjust the position of the Leg Press Plate (16), pull
out the Adjustment Pin (40) and slide the Adjustment
Tube (15) either backward or forward in the bracket
on the Leg Press Lever (14). Line up one of the
adjustment holes in the Adjustment Tube with the
hole in the bracket and re-insert the Adjustment Pin.
15
16
14
ATTACHING THE CURL PAD
To use the Curl Pad (22), remove the 2” Square Inner
Cap (67) from the Butterfly Leg (11). Slide the Curl
Post (21) to the desired height in the Butterfly Leg.
Tighten the Curl Knob (49) into the Butterfly Leg and
an adjustment hole in the Curl Post.
22
49
21
67
11
25
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CHANGING THE WEIGHT SETTING
41
To change the setting of a weight stack, insert a
Weight Pin (81) under the desired Weight (41). Insert
the Weight Pin so that the bent end touches the
weight stack. Turn the bent end down.
To use the Bottom Weight (47) with the press arms or
the leg press, insert the Weight Pin (81) under the
Bottom Weight. Remove the other Weight Pin from
the small weight stack.
41
81
47
To use the small weight stack with the press arms or
leg press, insert a Weight Pin (81) under the Bottom
Weight (47). Then, insert the other Weight Pin under
the desired Weight (41) in the right weight stack.
Note: Due to the cables and pulleys, the amount of resistance at each exercise station may vary from
the weight setting. Use the WEIGHT RESISTANCE CHART on page 27 to find the approximate amount of
resistance at each weight station.
26
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WEIGHT RESISTANCE CHART
The chart below shows the approximate weight resistance at each exercise station. “Left Top” and “Right Top”
refer to the 6 lb. top weights. “Bottom” refers to the 12.5 lb. bottom weight. The other numbers refer to the 12.5
lb. weight plates. Weight resistance shown for the butterfly arm station is for each butterfly arm. Note: The actu-
al resistance at each station may vary due to differences in individual weight plates as well as friction
between the cables, pulleys, and weight guides.
WEIGHT
HIGH
PULLEY
(lbs.)
PRESS
ARM
(lbs.)
LEG
PRESS
(lbs.)
BUTTER-
FLY ARM
(lbs.)
AB
PULLEY
(lbs.)
LEG
LEVER
(lbs.)
LOW
PULLEY
(lbs.)
Left Top
32
55
35
34
-
-
-
-
-
-
-
-
1
59
70
2
67
77
105
140
172
208
243
278
307
315
350
385
425
470
510
550
-
-
-
-
3
84
104
124
144
164
180
205
210
230
250
280
320
365
400
-
-
-
-
4
99
-
-
-
-
5
118
133
150
165
170
187
205
225
245
260
280
-
-
-
-
6
-
-
-
-
7
-
-
-
-
Bottom
-
-
-
-
Right Top
25
40
55
71
87
103
120
25
41
55
70
85
100
117
30
48
65
84
100
120
138
28
42
63
80
95
113
130
1
2
3
4
5
6
27
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TROUBLESHOOTING AND MAINTENANCE
Make sure all parts are properly tightened each time you use the weight system. Replace any worn parts immedi-
ately. The weight system can be cleaned using a damp cloth and mild non-abrasive detergent. Do not use solvents.
TIGHTENING THE CABLES
Woven cable, the type of cable used on the weight system, can stretch slightly when it is first used. If there is
slack in the cables before resistance is felt, the cables should be tightened. Slack can be removed from the
cables in several different ways.
When you are tightening the cables, note that they are linked into two distinct groups. The Rear Cable (70), the
Low Cable (71), the Butterfly Cable (73), and the Ab Cable (74) are all connected to the small weight stack. All
three cables will be tightened by tightening the Rear Cable at the small weight stack, or by adjusting the
3 1/2” Pulleys (35) in either set of Pulley Plates (32).
The Press Cable (72) is attached to the large weight stack. The Press Cable can be tightened at the large
weight stack or by moving the “V”-Pulleys (34) on the Press Upright (5) and the Press Seat Frame (12).
The Pulley Plates (32) have four sets of adjustment
holes for each 3 1/2” Pulley (35). Slack can be
removed from the cables by moving one or both
Pulleys to a set of holes closer to the center of the
Pulley Plates.
32
93
To move a 3 1/2” Pulley (35), remove the 3/8” Nylon
Locknut (90) and the 3/8” x 2” Bolt (93) from the
Pulley Plates (32), the Cable Trap (38), and Pulley.
Re-attach the Pulley and Cable Trap to the next set of
holes in the Pulley Plates with the Bolt and Nylon
Locknut. Note: Begin by moving the bottom Pulley
up one set of holes. If the cables are still too
loose, move the top Pulley down one set of holes,
until the slack in the cables has been removed.
Adjustment
Holes
90
38
35
The threaded ends on the Rear Cable (70) and the
Press Cable (72) attached to the weight stacks can
be used to tighten the cables.
To tighten the Rear Cable (70), remove the 5/16” x
1 3/4” Bolt (96) and the 5/16” Nylon Locknut (86) from
the “U”-Bracket (33) and the Short Weight Tube (44).
70
96
Tighten the 1/4” Nylon Locknut (103) at the end of the
Rear Cable (70) a few turns. Re-attach the “U”-
Bracket (33) to the Short Weight Tube (44) with the
5/16” x 1 3/4” Bolt (96) and the 5/16” Nylon Locknut
(86).
33
99
86
103
44
The Press Cable (72) can be tightened in the same
manner.
28
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Slack can be removed from the Press Cable (72) by
moving the “V”-Pulley (34) attached to the Press Seat
Frame (12) closer to the Press Upright (5).
85
Remove the 3/8” x 4 1/4” Bolt (85), 3/8” Washer (97),
and 3/8” Nylon Locknut (90) from the Press Seat
Frame (12), the “V”-Pulley (34), and the Long Cable
Trap (37). Move the Pulley to a hole that is closer to
the Press Upright (5), one hole at a time, until the
slack is removed. Reattach the Pulley and Cable Trap
to the hole with the Bolt, Washer, and Nylon Locknut.
97
37
12
72
34
90
If there is still slack in the Press Cable (72), move the
“V”-Pulley (34) attached to the small tube on the
Press Upright (5) to a hole that is closer to the
Upright.
Remove the 3/8” x 3 1/4” Bolt (104), 3/8” Washer
(97), and 3/8” Nylon Locknut (90) from the Press
Upright (5), the “V”-Pulley (34), and the Long Cable
Trap (37). Move the Pulley to a hole that is closer to
the Press Upright, one hole at a time, until the slack
is removed. Reattach the Pulley and Cable Trap to
the hole with the Bolt, Washer, and Nylon Locknut.
90
97
34
72
104
5
If a cable slips off the pulleys often, the cable may have become twisted. Remove the cable and re-install
it. If the cables need to be replaced, see ORDERING REPLACEMENT PARTS on the back cover of this manual.
29
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CABLE DIAGRAMS
The Cable Diagrams below and on the next page show the proper routing of the Rear Cable (70), the Low Cable
(71), the Press Cable (72), the Butterfly Cable (73), and the Ab Cable (74). The numbers show the correct route
for each Cable. Make sure that the Cables are routed correctly, that the Pulleys move smoothly, and that
the Cable Traps do not touch or bind the Cables. Incorrect cable routing can damage the weight system.
Press Cable (72)
CABLE ID CHART
73, 52”
14
70, 95 1/8”
71, 142 1/8”
74, 226 1/2”
72, 387 5/8”
2
1
15
13
12
5
6
9
8
3
10
11
7
4
30
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Ab Cable (74)
Low Cable (71)
3
1
7
4
5
2
3
6
2
1
5
4
6
8
9
10
Rear Cable (70)
11
1
3
Butterfly Cable (73)
2
4
5
2
1
3
4
31
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The model number and serial number of your WEIDER® PRO
POWER STACK weight system are listed on a decal attached to
the frame. See the front cover of this manual to find the location
of the decal.
Model No. 831.159831
QUESTIONS?
All replacement parts are available for immediate purchase or
special order when you visit your nearest SEARS Service Center.
To request service or to order parts by telephone, call the toll-free
numbers listed at the left.
If you find that:
• you need help assembling or
operating the WEIDER® PRO
POWER STACK weight system
When requesting help or service, or ordering parts, please be
prepared to provide the following information:
• a part is missing
• or you need to schedule repair
service
• The MODEL NUMBER of the product (831.159831)
• The NAME of the product (WEIDER® PRO POWER STACK
weight system)
call our toll-free HELPLINE
1-800-736-6879
Monday–Saturday, 7 am–7 pm
• The KEY NUMBER and DESCRIPTION of the PART (see the
PART LIST/EXPLODED DRAWING in the center of this manual).
Central Time (excluding holidays)
REPLACEMENT
PARTS
If parts become worn and need to
be replaced, call the following toll-
free number
SEARS, ROEBUCK AND CO., HOFFMAN ESTATES, IL 60179
1-800-FON-PART
(1-800-366-7278)
FULL 90 DAY WARRANTY
For 90 days from the date of purchase, if failure occurs due to defect in material or workmanship in this
SEARS WEIGHT SYSTEM EXERCISER, contact the nearest SEARS Service Center throughout the
United States and SEARS will repair or replace the WEIGHT SYSTEM EXERCISER, free of charge.
This warranty does not apply when the WEIGHT SYSTEM EXERCISER is used commercially or for
rental purposes.
This warranty gives you specific legal rights, and you may also have other rights which vary from state
to state.
SEARS, ROEBUCK AND CO., DEPT. 817WA, HOFFMAN ESTATES, IL 60179
Part No. 185648 R0502A
Printed in Canada © 2002 Sears, Roebuck and Co.
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This chart is provided to help you identify the small parts used in assembly. The number in parenthesis below
each part refers to the key number of the part from the PART LIST in the center of this manual. Important:
Some parts may have been pre-assembled for shipping purposes. If you cannot find a part in the parts
bags, check to see if it has been pre-assembled.
Note: Assembly is divided into four stages: 1) frame assembly; 2) arm
assembly; 3) cable assembly; and 4) seat assembly. The hardware for
each assembly stage is packaged separately. Wait until you begin each
stage to open that parts bag.
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PART IDENTIFICATION CHART—Model No. 831.159831
R0502A
1/4" Nylon Locknut (103)
3/8" x 1 3/4" Bolt (94)
3/8" x 2" Bolt (93)
5/16" Nylon Jamnut (77)
5/16" Nylon Locknut (86)
1/4" x 2 1/2" Bolt (79)
5/16" x 2 1/2" Bolt (87)
3/8" Nylon Jamnut (92)
3/8" Nylon Locknut (90)
3/8" x 2 1/2" Bolt (105)
1/4" x 2 1/2" Carriage Bolt (91)
5/16" x 2 1/2" Carriage Bolt (75)
3/8" x 2 1/2"Carriage Bolt (76)
1/4" Washer (99)
5/16" Washer (100)
5/16" x 2 3/4" Bolt (89)
3/8" x 2 3/4" Bolt (82)
3/8" Washer (97)
3/8" SAE Washer (113)
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5/16" x 1 3/4" Bolt (96)
5/16" x 3" Bolt (107)
5/16" x 1" Shoulder Bolt (84)
1” Tap Screw (80)
5/16" x 2 3/4" Shoulder Bolt (108)
3/8" x 3" Bolt (88)
3/8" x 3 1/4" Bolt (104)
3/8" x 3 1/2" Bolt (111)
1/4" x 3/4" Bolt (98)
3/8" x 3 1/2" Carriage Bolt (95)
3/8" x 3 3/4" Bolt (101)
3/8" x 4" Bolt (78)
3/8" x 4" Carriage Bolt (112)
3/8" x 4 1/4" Bolt (85)
3/8" x 4 3/4" Bolt (102)
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3/4" Round Inner Cap (64)
Round Inner Cap (63)
1” Retainer (54)
1" Square Inner Cap (69)
1" Round Inner Cap (66)
1" Cover Cap (55)
1 3/4" Square Inner Cap (68)
2" Square Inner Cap (67)
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REMOVE THIS PART LIST/EXPLODED DRAWING
FROM THE MANUAL.
SAVE THIS PART LIST/EXPLODED DRAWING FOR FUTURE REFERENCE
1
8
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PART LIST—Model No. 831.159831
R0502A
Key
No. Qty.
Butterfly Base
Center Base
Press Base
Butterfly Upright
Press Upright
Upright Support
Butterfly Top Frame
Center Top Frame
Press Top Frame
Butterfly Seat Frame
Butterfly Leg
DescriptionKey
59
No. Qty.
Description
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
2
2
2
2
3
1
4
2
4
25
2
4
19
2
1
13
2
1
1
2
4
1
1
1
2
2
4
2
4
2
1
1
3
1
2
2
4
2
4
2
2
15
7
1
1
1
1
1
1
10
1
3
1
5
2
2
10
1
2
1
36
5
Lat Bar
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
#
Plastic Bushing
Large Bushing
Handgrip
Round Inner Cap
3/4” Round Inner Cap
Butterfly Arm Bushing
1” Round Inner Cap
2” Square Inner Cap
1 3/4” Square Inner Cap
1” Square Inner Cap
Rear Cable
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Press Seat Frame
Leg Lever
Low Cable
Press Cable
Leg Press Lever
Adjustment Tube
Leg Press Plate
Press Frame
Press Arm
Right Butterfly Arm
Left Butterfly Arm
Curl Post
Butterfly Cable
Ab Cable
5/16” x 2 1/2” Carriage Bolt
3/8” x 2 1/2” Carriage Bolt
5/16” Nylon Jamnut
3/8” x 4” Bolt
1/4” x 2 1/2” Bolt
1” Tap Screw
Weight Pin
Curl Pad
Seat
Press Backrest
Butterfly Backrest
Right Weight Guide
Left Weight Guide
Small Support Plate
Large Support Plate
Seat Plate
Double “U”-Bracket
Pulley Plate
“U”-Bracket
“V”-Pulley
3 1/2” Pulley
4 1/2” Pulley
Long Cable Trap
Cable Trap
3/8” x 2 3/4” Bolt
Nylon Strap
5/16” x 1” Shoulder Bolt
3/8” x 4 1/4” Bolt
5/16” Nylon Locknut
5/16” x 2 1/2” Bolt
3/8” x 3” Bolt
5/16” x 2 3/4” Bolt
3/8” Nylon Locknut
1/4” x 2 1/2” Carriage Bolt
3/8” Nylon Jamnut
3/8” x 2” Bolt
3/8” x 1 3/4” Bolt
3/8” x 3 1/2” Carriage Bolt
5/16” x 1 3/4” Bolt
3/8” Washer
1/4” x 3/4” Bolt
1/4” Washer
1
14
30
3
16
6
6
2
3
18
8
10
9
7
3
5
4
2
1
4
1
4
2
1
1
4
1
1
Pulley Cover
Adjustment Pin
Weight
Top Weight
5/16” Washer
Long Weight Tube
Short Weight Tube
Weight Tube Bumper
Weight Bumper
Bottom Weight
Weight Plate
Curl Knob
Bumper
Pad Tube
Foam Pad
Large Foam Pad
1” Retainer
3/8” x 3 3/4” Bolt
3/8” x 4 3/4” Bolt
1/4” Nylon Locknut
3/8” x 3 1/4” Bolt
3/8” x 2 1/2” Bolt
3/8” x 8” Bolt
5/16 x 3” Bolt
5/16” x 2 3/4” Shoulder Bolt
Medium Support Plate
Pro Pulley
3/8” x 3 1/2” Bolt
3/8” x 4” Carriage Bolt
3/8” SAE Washer
User’s Manual
1” Cover Cap
Ab Strap
Chain
#
Exercise Guide
Cable Clip
Note: “#” indicates a non-illustrated part. Specifications are subject to change without notice.
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EXPLODED DRAWING—Model No. 831.159831
R0502A
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