OPERATOR’S MANUAL
66651-B
RELEASED:
REVISED:
(REV. F)
1-21-00
8-1-11
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
66651-B AIR MOTOR
10” AIR MOTOR
6” STROKE
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
SERVICE KITS
Use only genuine ARO® replacement parts to assure
compatible pressure rating and longest service life.
637110 service kit includes the necessary soft parts for
normal service of the entire air motor.
y
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637111 service kit is a replacement valve kit.
GENERAL DESCRIPTION
The 10” air motor is a power unit used with a two-ball or
chop-check pump. It utilizes tie rod construction for easy
breakdown and it connects to the lower pump end with tie
rods for easy operation. Consult the pump model operator’s
manual for specific instructions.
OPERATING AND SAFETY PRECAUTIONS
DO NOT EXCEED MAXIMUM AIR INLET PRESSURE OF 90
P.S.I. (6.2 bar) OR 75 CYCLES PER MINUTE.
CAUTION: High pressure equipment - Always disconnect air
supply and relieve material pressure before attempting to
service.
A ground lug is located on the air motor. This ground lug al-
lows proper grounding of the pump.
AIR AND LUBE REQUIREMENTS
A filter capable of filtering particles larger than 50 microns
should be used with a lubricator.
Figure 1
Filtered and oiled air will allow the pump to operate more ef-
ficiently and yield a longer life to operating parts and mecha-
nisms.
Use an air line lubricator and keep it supplied with a good
grade of S.A.E. #90W non-detergent gear oil set at a rate not
to exceed approximately 1 drop per minute.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
ꢀ (800) 495-0276 y FAX (800) 892-6276
© 2011
CCN 99834889
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DISASSEMBLY / ASSEMBLY
28. Remove the (48) screw from the (43) piston assembly.
29. Remove the (39) valve rod, (45) spring and (42) ball from
the (43) piston assembly.
AIR MOTOR DISASSEMBLY
NOTE: All threads are right hand.
1. Place the air motor in an up-stroke position by pushing
(43) piston assembly toward the top of the motor.
2. Remove six (26) cap screws from the top of (27 and 30)
blocks.
3. Remove (27 and 30) blocks from (22) head plate.
4. Remove (34) tube from (46) base assembly. Remove two
(33) “O” rings from (34) tube and one (33) “O” ring from
the bottom of (30) block manifold.
5. Remove four (26) cap screws from the end of (27) block.
6. Separate (27) block from (30) block manifold and remove
(28 and 29) “O”rings.
7. Remove 3/4 - 14 N.P.T. pipe plugs from the two exhaust
ports, if applicable.
AIR MOTOR ASSEMBLY
1. Place the (39) valve rod thru the (48) screw.
2. Clean the threads of the (39) valve rod and the (5) exten-
sion rod. Apply Loctite 271 to these threads and screw
the (5) extension rod to the (39) valve rod and tighten
by holding the (39) valve rod below the threads with an
adjustable type pliers and using a wrench on the flats of
the (5) extension rod. CAUTION: Do not mar or damage
the finish on the (5) extension rod.
3. Place the (42) ball and (45) spring into the (43) piston as-
sembly.
8. Using a 1/2” socket on (8) cap screw, turn (20) spool
clockwise to align opening or slot in (20) spool with the
3/4 - 14 N.P.T. exhaust port nearest the (8) cap screw.
9. Insert a 1/4” rod or similar device thru the exhaust port of
(30) block manifold and into the opening or slot of (20)
spool. This rod will prevent rotation of (20) spool when
removing (8) cap screw and (9) washer. CAUTION: Do
not permit this rod to rest against (17) spacer legs,
which could cause breakage of (17) spacer.
10. Remove (8) cap screw and (9) washer.
4. Place the (39) valve rod and (5) extension rod into the (43)
piston assembly. Apply Loctite 271 to the threads of the
(48) screw and thread the (48) screw into the (43) piston
assembly and tighten.
5. Assemble the (50) “O” ring to the groove in the (43) pis-
ton assembly.
6. Assemble the (36) “O” ring to the groove in the (46) air
motor base assembly.
7. Assemble the (41) “U” cup (lips up), (44) guide washer
and (40) retaining ring into the (46) base assembly.
8. Assemble the (43) piston assembly into the (46) base as-
sembly, being careful not to damage the (41) “U”cup.
9. Lubricate the inside diameter of the (37) air cylinder and
slide it down over the (43) piston assembly and onto the
(46) air motor base assembly (see figure 4).
10. Assemble the (36) “O” ring to the groove in the (22) head
plate.
11. Align the notch in the (22) head plate with the port in
the (46) air motor base assembly and press the (22) head
plate down until it is seated against the (37) air cylinder.
12. Assemble eight (49) cap screws thru the (22) head plate
and (46) air motor base assembly.
11. Unscrew four (32) cap screws and remove (31) cap as-
sembly.
12. Remove (20) spool out the “exhaust end” of (30) block
manifold and remove (11) piston out the other end.
13. From the “exhaust end” of (30) block manifold, remove
four (19) washers, four (17) spacers, four (18) “O” rings,
five (15) “O”rings, (16) washer, (14) “U”cup, (13) gland and
(10) “O”ring.
14. Remove (12) “U”cup from (11) piston.
15. Using the wrench flats provided, remove the (2) piston
assembly from the (5) extension rod.
16. Remove (1 and 3) “O”rings from (2) piston assembly.
17. Remove (4) washer, (6) cylinder, two (7) “O” rings and (24)
“U”cup from (22) head plate.
13. Assemble eight (47) nuts on the (49) cap screws and
tighten alternately and evenly.
18. Remove two (7) “O” rings and (24) “U” cup from (6) cylin-
der.
19. Remove eight (47) nuts from (49) cap screws.
20. Remove eight (49) cap screws from (22) head plate and
(46) air motor base assembly.
21. Remove (22) head plate from (37) air cylinder, then re-
move (36) “O”ring from (22) head plate.
22. Pull upward on (37) air cylinder until (43) piston assem-
bly separates from the (46) base assembly. If, in this step,
the (43) piston assembly is not pulled from the (46) base
assembly, then remove it after removing the (37) air cyl-
inder.
23. If the (37) air cylinder and (43) piston assembly are re-
moved as one unit, then remove the (43) piston assembly
from the (37) air cylinder.
24. Remove the (36) “O”ring from the (46) base assembly.
25. Remove (40) retaining ring, (44) guide washer and (41)“U”
cup from (46) base assembly.
26. Remove the (50) “O”ring from the (43) piston assembly.
27. Unscrew (5) extension rod from (39) valve rod by holding
the (39) valve rod with an adjustable type pliers and us-
ing a wrench on the wrench flats provided at the top of
the (5) extension rod.
14. Assemble two (7) “O” rings to the grooves in the (6) cylin-
der.
15. Assemble the (24) “U” cup into the (6) cylinder, with the
lips facing out.
16. Assemble the (6) cylinder over the (5) extension rod and
into the (22) head plate. NOTE: Assemble the (6) cylinder
with the “U”cup end onto the (5) extension rod first.
17. Assemble the (4) washer over the (5) extension rod and
into the (6) cylinder.
18. Clean the threads on the (2) piston assembly. Apply
Loctite 271 to the threads and assemble to the (5) exten-
sion rod and tighten, using the wrench flats. CAUTION:
Do not mar or damage the surface of either of these
parts.
19. Assemble the (1 and 3) “O” rings to the grooves in the (2)
piston assembly.
20. Assemble the (14) “U” cup into the (13) gland, with the
lips pointed into the gland. Lubricate the bore of the (30)
block manifold and assemble the (13) gland into the (30)
block manifold, with the lips of the (14) “U” cup pointed
into the block manifold. NOTE: Be sure the (13) gland is
seated squarely against the shoulder in the (30) block
manifold.
66651-B (en)
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DISASSEMBLY / ASSEMBLY
21. Assemble one (15) “O” ring and the (16) washer into the
29. Assemble the (8) cap screw and (9) washer thru the (11)
(30) block manifold and against the (13) gland (see figure
5).
piston.
30. Apply Loctite 271 to the threads of the (8) cap screw then
thread it into the (20) spool.
22. Assemble four (15) “O” rings, four (18) “O” rings, four (17)
spacers and four (19) washers into the (30) block mani-
fold (see figure 5). NOTE: Assemble the (19) washers with
the i.d. lips toward the (18) “O” ring. Position the (17)
spacers so the legs are not aligned with the 3/4 - 14 N.P.T.
exhaust ports in the (30) block manifold.
31. Insert a 1/4” rod or similar device thru the 3/4 - 14 N.P.T.
exhaust port in the side of the (30) block manifold and
thru the slot of the (20) spool to prevent it from rotating,
then tighten the (8) cap screw. Remove the 1/4”rod.
32. Assemble the (28 and 29) “O” rings into the (30) block
manifold.
23. Clean the threads in the (20) spool.
24. Apply grease to the exterior of the (20) spool and assem-
ble it into the (30) block manifold. Align the slot in the (20)
spool with the 3/4 - 14 N.P.T. exhaust port in the side of
the (30) block manifold.
25. Assemble the (51) spacer into the (31) cap assembly and
assemble the (31) cap assembly to the (30) block mani-
fold, securing with four (32) cap screws.
26. Assemble the (12) “U” cup into the groove in the (11)
piston, with the lips pointed toward the “boss” side of the
piston.
33. Assemble the (27) block to the (30) block manifold, se-
curing with four (26) cap screws (hand tight only).
34. Assemble two (33) “O”rings to grooves in the (34) tube.
35. Assemble the (34) tube into the port provided in the (46)
air motor base assembly.
36. Assemble one (33) “O” ring to the counterbore in the bot-
tom of the (30) block manifold.
37. Lubricate the bore in the (27) block.
38. Carefully slide the (27 and 30) block assemblies down
over the (2) piston assembly and (34) tube and onto the
(22) head plate.
27. Assemble the (10) “O” ring onto the boss portion of the
(11) piston.
28. Clean the threads on the (8) cap screw.
39. Assemble six (26) cap screws in the (27 and 30) block
assemblies. Tighten the two (26) cap screws in the (27)
(continued on page 6)
PARTS LIST
(size)
(size)
Item Description
Qty Part No.
(1) Y325-8
(1) 66654
Item Description
Qty Part No.
(1) 92531
(1/16" x 5/16" o.d.)
1
2
"O" Ring
31a Cap
9
(includes items 2a and 2b)
Piston Assembly
31b Washer
(1) 92516
(1/4” - 20 x 1-3/4”)
2a Washer
2b Piston
(1) 92524
32 Cap Screw, Socket Head
(1/16” x 1-1/4” o.d.)
(4) Y99-45
(3) Y325-24
(1) 92518
(1) 92520
33 “O” Ring
34 Tube
9
9
(3/32” x 5/8” o.d.)
3
4
5
6
7
8
9
“O” Ring
Washer
(1) Y325-111
(1) 92517
9
9
(1/8 - 27 N.P.T.)
35 Pipe Plug
36 “O” Ring
(1) Y227-2-L
(2) Y325-272
(1) 92217
(1/8” x 9-3/4” o.d.)
Extension Rod
Cylinder
(1) 92519
(1) 92513
37 Air Cylinder
(1/16” x 7/8” o.d.)
(1/16 - 27 N.P.T.)
“O” Ring
(2) Y325-18
(1) Y6-54-C
(1) F15-44-C
(1) Y325-12
(1) 92521
38 Pipe Plug
(1) Y227-1-L
(1) 92527
9
(5/16” - 18 x 7/8”)
Cap Screw, Hex Head
Washer
39 Valve Rod
(2.630” o.d.)
40 Retaining Ring
41 “U” Cup Packing
(1) Y147-237
(1) Y186-24
(1) Y16-14
(1) 62110-B
(1) 92216
(1/16” x 1/2” o.d.)
(1/4” x 1-3/4” o.d.)
10 “O” Ring
9
9
9
(0.4375” dia.)
11 Piston
42 Ball
(3/16” x 1-5/8” o.d.)
12 “U” Cup Packing
13 Gland
(1) Y186-53
(1) 94789
43 Piston Assembly
44 Guide Washer
45 Spring
(3/16” x 1-1/2” o.d.)
14 “U” Cup Packing
(1) Y186-52
(5) Y325-134
(1) 94790
(1) 24143-B
(1) 66652
9
9
(3/32” x 2-1/16” o.d.)
(includes items 46a and 46b)
15 “O” Ring
16 Washer
17 Spacer
18 “O” Ring
19 Washer
20 Spool
46 Air Motor Base Ass’y
46a Air Motor Base
46b Bushing
(1) 92530
(4) 93250
(1) 92511
(1/8” x 1-3/4” o.d.)
(1/2” - 20)
(4) Y325-222
(4) 93251
47 Nut
(8) Y11-8-C
(1) 92525
9
9
48 Screw
(1/2” - 20 x 10-1/4”)
(1) 92522
49 Cap Screw, Hex Head
(1/4” x 10” o.d.)
(8) 94046-1
(1) Y325-448
(1) 92860
22 Head Plate
(1) 92529
50 “O” Ring
51 Spacer
9
(1/8” x 11/16” o.d.)
24 “U” Cup Packing
(1) Y186-46
(2) Y227-2-L
(10) Y99-68
(1) 92514
(1/8 - 27 N.P.T.)
25 Pipe Plug
52 Connector
(1) 93006
(3/8” - 16 x 2-1/2”)
(1/8” x 2”)
26 Cap Screw, Socket Head
27 Block
Cotter Pin
(1) Y15-47-C
(2) 94833
™
™
9
9
Gadus S2 U1000 Grease Packet (1/4 oz.)
(1/16” x 5/8” o.d.)
28 “O” Ring
(1) Y325-14
(1) Y325-131
(1) 92515
9
9
(3/32” x 1-7/8” o.d.)
29 “O” Ring
Items included in service kit
637110
637111
9
™
(entire valve section)
30 Block Manifold
Service Kit
(includes items 31a and 31b)
31 Cap Assembly
(1) 66655
Items not included with 66651-B air motor
Page 4 of 8
66651-B (en)
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PARTS LIST
29
28
8
ꢀ
9
25
26
27
1
ꢂ
11
12
10
ꢀ
52
26
30
14
15
16
17
18
15
19
51
32
2a
2b
6
2
3
4
7
ꢀ
13
38
ꢂ
33
24
35
ꢂ
20
31b
22
36
5
31a
31
ꢁ
ꢀ
37
ꢀ
49
48
39
33
45
42
34
41
33
36
50
43
40
44
ꢁ
ꢁ
46b
46a
46
47
LUBRICATION / SEALANTS
Apply thread sealant to all pipe threads.
c
d
e
Apply Loctite® 271™ to threads when assembling.
Lubricate (43), (41), i.d. of (37) and all upper valve
parts with Gadus S2 U1000 grease.
Figure 3
66651-B (en)
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DISASSEMBLY / REASSEMBLY
block, making sure it rests squarely on the (22) head
TROUBLE SHOOTING
Air leakage out of the main exhaust.
plate.
40. Snug up the other four (26) cap screws in the top of the
(30) block manifold just enough to draw the (30) block
manifold against the (22) head plate.
41. Tighten the four (26) cap screws which secure the (27)
block to the (30) block manifold. Now, tighten the four
(26) cap screws in the top of the (30) block manifold.
Check for worn or damaged (18) “O”rings on spool.
Check for worn or damaged (14) “U”cup packing.
Check for worn or damaged (20) spool.
Check for worn or damaged (50) “O” ring on (43) piston
assembly.
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Air leakage around (43) piston assembly.
Check for worn or damaged (12) “U”cup packing.
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37 Air Cylinder
50 “O” Ring
Fluid leakage out of the pilot exhaust hole.
Check for worn or damaged (3) “O”ring.
Check for worn or damaged inside diameter of (6) cylin-
der.
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Check for worn or damaged (1) “O”ring.
Check for worn or damaged (24) “U”cup packing.
Check for worn or damaged (12) “U” cup packing on (11)
piston.
y
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46 Air Motor Base
43 Piston Assembly
Figure 4
ARO® is a registered trademark of Ingersoll-Rand Company Gadus® is a registered trademark of the Shell Oil Company Loctite® is a registered trademark of the Henkel Loctite Corporation
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271® is a trademark of the Henkel Loctite Corporation
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Page 6 of 8
66651-B (en)
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CROSS SECTION
Figure 5
66651-B (en)
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OPTIONAL 66718 MUFFLER ASSEMBLY
MUFFLER INSTALLATION
66718 PARTS LIST
(size)
Item Description
Qty Part No.
(1) 79294
(1) 79293
(1) 79295
(4) Y6-417
(1) Y17-14-C
NOTE: Secure fittings after all components have been posi-
tioned.
1
2
3
4
5
90° EMT Short Angle Elbow
1. Remove nut and sleeve from the (1) 90° short angle el-
bow.
2. Insert and install the 3/4 - 14 N.P.T. end of the (1) elbow
to the air motor (back off the retaining nut a few turns).
3. Insert the (5) pipe plug into the air motor secondary ex-
haust port.
Tube
Muffler
(
1/4”- 20 x 4”)
Cap Screw
Pipe Plug
(3/4 - 14 N.P.T.)
4. Slide the sleeve and nut onto the (2) tube and insert the
tube into the (1) elbow.
5. Locate the (3) muffler on the collar of the air motor while
aligning the (2) tube with the hole provided in the muf-
fler.
6. Secure the muffler to the air motor collar with four (4)
cap screws.
7. Secure all connections.
2
1
5
3
4
Figure 6
PN 97999-869
66651-B (en)
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