¨
Model No. 831.288140
CAUTION
Read all precautions and
instructions in this manual
before using this equipment.
Keep this manual for future
reference.
USERÕS MANUAL
SEARS, ROEBUCK AND CO., HOFFMAN ESTATES, IL 60179
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BEFORE YOU BEGIN
Thank you for selecting the new LIFESTYLER¨ DT
900. The LIFESTYLER¨ DT 900 provides you with a
low-impact workout in the convenience and privacy of
your own home.
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
mention the product model number when calling. The
model number is 831.288140.
For your benefit, read this manual carefully before
you use the LIFESTYLER¨ DT 900. If you have
questions after reading the manual, please call our
Before reading further, please familiarize yourself with
the parts that are labeled in the drawing below.
Handlebars
Seat
Seat Pin
Seat Post
Console
Resistance Knob
Flywheel
Pedal
Side Shield
BACK
FRONT
RIGHT SIDE
3
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ASSEMBLY
Place all parts of the exercise cycle in a cleared area and remove the packing materials. Do not dispose of the
packing materials until assembly is completed. Assembly requires a phillips screwdriver
and an adjustable wrench
(not included).
1. Refer to the inset drawing. Remove the indicated
plastic cap from the Frame (1). Discard the cap.
1
1
Cap
32
Next, slide the bracket on the Rear Stabilizer (2)
into the Frame (1). Attach the Rear Stabilizer with
four Stabilizer Screws (32).
1
2
2. Align the Front Stabilizer (5) with the saddle bracket
on the front of the Frame (1). Make sure that the
Front Stabilizer is turned so the square holes
are facing away from the saddle bracket. Attach
the Front Stabilizer with two Stabilizer Carriage
Bolts (18), two Curved Washers (14), and two
Stabilizer Nuts (30).
2
14
30
5
1
Square Holes
18
Caps
3. Refer to the inset drawing. Remove the indicated
plastic caps from the Frame (1). Discard the caps.
3
42
33
1
Next, slide the Left Handlebar (40) into the left side
of the Frame (1). Slide the Right Handlebar (41) into
the right side of the Frame.
33
3
Slide the Foam Grip (42) onto the Top Handlebar (3).
Push the ends of the Foam Grip towards the center
of the Top Handlebar so the ends of the Top
Handlebar are uncovered. Insert the Top Handlebar
into the Left and Right Handlebars (40, 41) and
attach it with two Handlebar Screws (33). Slide the
Foam Grip back so it covers the Handlebar Screws.
40
41
Align the holes in the Left and Right Handlebars
(40, 41) with the holes in the Frame (1). Attach the
Handlebars with four Handlebar Bolts (36), four
Handlebar Washers (38), and four Locknuts (37).
Make sure that the Locknuts are in the hexagonal
holes in the Frame.
38
36
38
37
1
4
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4. The Console (7) requires two "AA" batteries (not
included). Alkaline batteries are recommended.
Refer to the inset drawing. Remove the battery door
from the back of the Console. Press two batteries
into the battery compartment. Make sure that the
negative ends of the batteries (marked ÒÐÓ) are
touching the springs in the battery compartment.
Re-attach the battery door.
4
7
Console
Wire
Console
Plate
Next, plug the console wire into the socket on the
back of the Console (7).
Slide the Console (7) onto the console plate. Note:
The Console attaches by friction; it does not snap
into place.
Batteries
Battery Door
5. Attach the Seat (11) to the Seat Post (10) with three
Seat Nuts (9) and three Seat Washers (8). Note:
The Seat Nuts and Seat Washers may be pre-
attached to the underside of the Seat.
5
11
Insert the Seat Post (10) into the Frame (1). Press
the Frame Bushing (4) into the Frame. Note: The
Frame Bushing may be pre-assembled.
8
8
9
Next, align one of the holes in the Seat Post (10)
with the hole in the Frame (1). Insert the Seat Pin
(31) through the Frame and the Seat Post to select
the desired seat height. Make sure to insert the
Seat Pin through one of the holes in the Seat
Post; do not insert the Seat Pin under the Seat
Post. Tighten the Seat Pin into the Frame.
9
10
4
31
1
6. Identify the Right Pedal (22). (The Right Pedal is
marked with an ÒR.Ó) Using an adjustable wrench,
tighten the Right Pedal clockwise into the right arm
of the Crank (20).
6
20
22
Tighten the Left Pedal (21) counterclockwise into
the left arm on the Crank (20).
R
21
R
L
7. Make sure that all parts are properly tightened before you use the exercise cycle.
5
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HOW TO USE THE EXERCISE CYCLE
HOW TO ADJUST THE SEAT
BATTERY INSTALLATION
For effective exer-
cise, the seat
Before the console can be operated, two Ò"AA"Ó bat-
teries must be installed. If you have not installed bat-
teries, see assembly step 4 on page 5.
must be at the
proper height. As
you pedal, there
should be a slight
bend in your
knees when the
pedals are in the
lowest position. To
adjust the seat,
first hold the seat
and turn the seat
Seat
DESCRIPTION OF THE CONSOLE
The console features five modes that provide instant
exercise feedback during your workouts. The modes
are described below.
Seat
Post
Frame
Seat
Pin
pin counterclockwise to remove it. Next, align one of
the holes in the seat post with the hole in the frame.
Insert the seat pin through the frame and the seat
post to select the desired height. Make sure to insert
the seat pin through the seat post; do not insert
the seat pin under the seat post. Tighten the seat
pin into the frame.
SPEED
TIME
SCAN
DISTANCE
CALORIES
HOW TO ADJUST THE PEDALING RESISTANCE
To vary the inten-
sity of your exer-
cise, the pedaling
resistance can be
Knob
adjusted. The
Mode
Indicators
Display
Resistance
resistance is con-
trolled with the
resistance knob.
To increase the
Button
resistance, turn
the resistance
knob clockwise; to decrease the resistance, turn the
knob counterclockwise.
¥ SpeedÑDisplays your pedaling speed, in miles per
hour.
LEVELING THE EXERCISE CYCLE
Your exercise
cycle features
adjustable end-
caps on the front
stabilizer. If the
exercise cycle
tends to rock
when in use,
adjust one or both
of the endcaps by
turning them until
the exercise cycle is stable.
¥ TimeÑDisplays the elapsed time. Note: If you stop
pedaling for ten seconds or longer, the time mode
will pause until you resume.
Endcap
¥ DistanceÑDisplays the total distance you have ped-
aled, in miles.
Stabilizer
¥ CalorieÑDisplays the approximate number of calo-
ries you have burned.
¥ ScanÑDisplays the speed, time, distance, and calo-
rie modes, for 5 seconds each, in a repeating cycle.
6
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HOW TO OPERATE THE CONSOLE
Speed, time,
distance or
Note: If there is a piece of clear plastic on the face of
the console, remove it before operating the console.
calorie modeÑ
To select one of
these modes for
continuous dis-
play, press the
console button
repeatedly. The
mode indicators will show which mode is selected.
Make sure that the scan mode is not selected.
1. To turn on the power, press the console button or
simply begin pedaling. When the power is turned
on, the entire display will appear for two seconds.
The console will then be ready for operation.
2. Select one of the five modes:
Scan modeÑ
When the power
is turned on, the
scan mode will
3. To reset the display, hold down the console button
for two seconds. After the display is reset, the scan
mode will be selected.
Mode Indicators
automatically be
selected. One
mode indicator
will show that
the scan mode
is selected, and
4. To turn off the power, simply wait for about four min-
utes. Note: The console has an Òauto-offÓ fea-
ture. If the pedals are not moved and the con-
sole button is not pressed for four minutes, the
power will turn off automatically in order to con-
serve the batteries.
a flashing mode indicator will show which mode is
currently displayed. Note: If a different mode is
selected, you can select the scan mode again by
repeatedly pressing the console button.
7
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MAINTENANCE AND TROUBLE-SHOOTING
Inspect and tighten all parts of the exercise cycle reg-
ularly. Replace any worn parts immediately.
HOW TO ADJUST THE RESISTANCE STRAP
If there is not enough pedaling resistance when the
resistance knob is turned to the highest setting, the
resistance strap may need to be adjusted. To adjust
the resistance
The exercise cycle can be cleaned with a soft, damp
cloth. Avoid spilling liquid on the console. Keep the
console out of direct sunlight or the display may be
damaged. Remove the batteries when storing the
exercise cycle.
strap, first turn
the resistance
knob to the
Slotted
Tab
BATTERY REPLACEMENT
lowest setting.
Next, locate
the slotted tab
on the front of
the exercise
cycle. Grip the
main part the
resistance
Resistance
Strap
If the console does not function properly, the batteries
should be replaced. See assembly step 4 on page 5.
In addition, make sure that the console wire is
plugged into the console.
HOW TO TIGHTEN THE CRANK
strap underneath the slotted tab and pull it towards
the slot. When a little slack is created, pull the end of
the resistance strap tight and then let go of the strap.
Turn the crank for a moment to make sure that there
is not too much resistance.
If the arms of
the crank
become
loose, they
should be
Slotted
tightened in
HOW TO ADJUST THE CHAIN
Crank
Nut
Crank
Nut
order to pre-
vent exces-
sive wear.
Loosen the
crank nut on
the left arm of
the crank.
Place the end of a standard screwdriver in one of the
slots in the slotted crank nut. Lightly tap the screw-
driver with a hammer to turn the slotted crank nut
counterclockwise until the arms are no longer loose.
Do not overtighten the slotted crank nut. When the
slotted crank nut is properly tightened, retighten the
crank nut.
The exercise cycle features a chain that must be kept
properly adjusted. If the chain causes excessive noise
or slips as you pedal, the chain should be adjusted.
Crank Arm
To tighten the
chain, loosen,
but do not
remove, the
axle nuts on
both sides of
the flywheel.
Pull the fly-
wheel slightly
Nut
forwards.
Axle
Make sure that
the flywheel is
straight and tighten the axle nuts.
8
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CONDITIONING GUIDELINES
The following guidelines will help you to plan your
exercise program. Remember that proper nutrition
and adequate rest are essential for successful results.
If your goal is to burn fat, adjust the intensity of your
exercise until your heart rate is near the lowest num-
ber in your training zone as you exercise.
For maximum fat burning, adjust the intensity of your
exercise until your heart rate is near the middle num-
ber in your training zone as you exercise.
WARNING: Before beginning this or any exer-
cise program, consult your physician. This is
especially important for persons over the age
of 35 or persons with pre-existing health
problems.
Aerobic Exercise
If your goal is to strengthen your cardiovascular sys-
tem, your exercise must be Òaerobic.Ó Aerobic exer-
cise is activity that requires large amounts of oxygen
for prolonged periods of time. This increases the
demand on the heart to pump blood to the muscles,
and on the lungs to oxygenate the blood. For aerobic
exercise, adjust the intensity of your exercise until
your heart rate is near the highest number in your
training zone.
EXERCISE INTENSITY
Whether your goal is to burn fat or to strengthen your
cardiovascular system, the key to achieving the
desired results is to exercise with the proper intensity.
The proper intensity level can be found by using your
heart rate as a guide. The chart below shows recom-
mended heart rates for fat burning, maximum fat
burning, and cardiovascular (aerobic) exercise.
HOW TO MEASURE YOUR HEART RATE
To measure your
heart rate, first
exercise for at
least four minutes.
Then, stop exercis-
ing and place two
fingers on your
wrist as shown.
Take a six-second
heartbeat count,
and multiply the
result by 10 to find your heart rate. For example, if
your six-second heartbeat count is 14, your heart rate
is 140 beats per minute. (A six-second count is used
because your heart rate will drop rapidly when you
stop exercising.)
To find the proper heart rate for you, first find your age
on the bottom of the chart (ages are rounded off to
the nearest ten years). Next, find the three numbers
above your age. The three numbers are your Òtraining
zone.Ó The lowest number is the recommended heart
rate for fat burning; the middle number is the heart
rate for maximum fat burning; the highest number is
the heart rate for aerobic exercise.
WORKOUT GUIDELINES
Each workout should include the following three
important parts:
A warm-up, consisting of 5 to 10 minutes of stretch-
ing and light exercise. A proper warm-up increases
your body temperature, heart rate, and circulation in
preparation for exercise.
Burning Fat
To burn fat effectively, you must exercise at a rela-
tively low intensity level for a sustained period of time.
During the first few minutes of exercise, your body
uses easily accessible carbohydrate calories for ener-
gy. Only after the first few minutes of exercise does
your body begin to use stored fat calories for energy.
Training zone exercise, consisting of 20 to 30 min-
utes of exercising with your heart rate in your training
zone. (During the first few weeks of your exercise pro-
gram, do not keep your heart rate in your training
zone for longer than 20 minutes.)
9
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A cool-down, with 5 to 10 minutes of stretching. This
will increase the flexibility of your muscles and will
help to prevent post-exercise problems.
workouts. After a few months of regular exercise, you
may complete up to five workouts each week, if
desired. Caution: Be sure to progress at your own
pace and avoid overdoing it. Incorrect or excessive
training may result in injury to your health.
EXERCISE FREQUENCY
To maintain or improve your condition, plan three work-
outs each week, with at least one day of rest between
Remember, the key to success is make exercise a
regular and enjoyable part of your everyday life.
PART LISTÑModel No. 831.288140
R0399A
Key No. Qty.
Description
Key No. Qty.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
1
1
1
1
2
1
3
3
1
1
2
2
2
6
1
1
2
1
1
1
1
Frame
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
#
1
1
3
1
4
1
2
2
1
4
2
1
1
4
4
4
2
1
1
1
1
1
Chain
Rear Stabilizer
Top Handlebar
Frame Bushing
Front Stabilizer
Stabilizer Endcap
Console
Seat Washer
Seat Nut
Seat Post
Seat
Side Shield
Bronze Bushing
Curved Washer
Side Shield Screw
Flywheel
Resistance Cable/Knob
7/16Ó Flat Washer
Flywheel Axle
3/8Ó Axle Nut
Odometer
Axle Nut
Stabilizer Nut
Seat Pin
Stabilizer Screw
Handlebar Screw
Resistance Spring
Sprocket
Handlebar Bolt
Locknuts
Handlebar Washer
Round Endcap
Left Handlebar
Right Handlebar
Foam Grip
Resistance Strap
Stabilizer Carriage Bolt
Crank Hardware Assembly
Crank
Left Pedal
Right Pedal
UserÕs Manual
Multipurpose Tool
#
Note: Ò#Ó refers to a non-illustrated part. Specifications are subject to change without notice. See the back cover
of this manual for information about ordering replacement parts.
10
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EXPLODED DRAWINGÑModel No. 831.288140
R0399A
29
7
27
25
28
25
13
16
42
27
33
26
11
13
27
3
33
29
25
40
41
21
20
8
4
8
9
9
19
36
10
15
24
38
31
19
39
32
37
12
2
15
39
35
34
20
15
17
22
15
23
6
1
30
14
5
12
6
15
18
15
11
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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.
Model No. 831.288140
QUESTIONS?
When requesting help or service, or ordering parts, please be
prepared to provide the following information:
If you find that:
¥ The MODEL NUMBER of the product (831.288140).
¥ The NAME of the product (LIFESTYLER¨ DT 900).
¥ you need help assembling or
operating the LIFESTYLER¨ DT
900
¥ a part is missing
¥ The KEY NUMBER and DESCRIPTION of the PART (see the
PART LIST and the EXPLODED DRAWING on pages 10 and 11).
¥ or you need to schedule repair
service
call our toll-free HELPLINE
1-800-736-6879
MondayÐSaturday, 7 amÐ7 pm
Central Time (excluding holidays)
REPLACEMENT
PARTS
If parts become worn and need to
be replaced, call the following toll-
free number
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 BIKE EXERCISER, contact the nearest SEARS Service Center throughout the United States
and SEARS will repair or replace the BIKE EXERCISER, free of charge.
This warranty does not apply when the BIKE 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. 152378 H04402AC R0399A
Printed in Taiwan © 1999 Sears, Roebuck and Co.
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