Ingersoll-Rand 66523-B User Manual

OPERATOR’S MANUAL 66523-B

(Use an Allen wrench to push out screws and washers as shown.)

Figure 1

Allen Wrench

46 Washer (8)

45 Screw (8)

(The remaining four
washers and screws are
on the opposite side.)

Figure 3

2 10

2

4536

30 29

4534

46

28

334645

47

48

7

INCLUDING: OPERATION, INSTALLATION & MAINTENANCE.

8” AIR MOTOR

6” Stroke

Also covers 66614 service kits.

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 compat-



ible pressure rating and longest service life.
66614 for general repair of 66523-B air motor.



90350 installation tool is recommended for repair of 66523-B



air motor.

DISASSEMBLY

NOTE: All threads are right hand.

Force the (43) piston assembly up by pushing toward the top

1.
of the air motor (see gure 4).
Remove six (1) screws, releasing the (31) cap and (32) gasket.

2.
Loosen the eight (45) screws, which hold the (33) valve plate

3.
and pin assembly, (30) valve guide, two (4) valve guides and
the (5) valve plate, until the (30) valve guide and the two (4)
valve guides can be removed by pulling upward (see gures 1
and 2).

RELEASED: 1-21-00
REVISED: 8-1-11
(REV. D)

4. Remove the eight (45) screws and the eight (46) washers from
the 8” air motor by pressure outward with a small Allen wrench
(see gure 1).

5. Using a screwdriver, unhook the (28) insert spring assembly
from the bottom of the (33) valve plate and pin assembly (see
gure 2).

6. Remove the (28) insert spring assembly from the pins in the
top of the (33) valve plate and pin assembly.

7. Pull the (2) valve piston upward until the (7) upper gland has
pulled out of its chamber.

8. Remove the (7) upper gland.

9. Remove the (39) seal, (38) “O” ring and the (13) “O” ring from
the (7) upper gland (see gure 7).

10. Disassemble the (2) valve piston from the (10) piston adapter
(see gure 3).

11. Remove (2) valve piston.

12. Pull the (10) piston adapter upward and grasp the (11) exten-

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sion rod below the (10) adapter. Push the (10) piston adapter
down on the (11) extension rod. Remove the (37) washer and
(11) extension rod.

Figure 2

13. Remove the (8) upper washer and the (9) “U” cup packing from
the (10) piston adapter.

14. Remove the six (22) nuts and (23) bolts.

15. Remove the (35) head assembly and place on the workbench,
with the end that the tube ts in, up.

16. Remove the (16) “O” ring from the (35) head assembly.

17. Remove the four (40) screws, releasing the (41) lower gland.

18. Remove the (12) lower washer and (13 and 42) “O” rings from
the (41) lower gland.

19. Remove (44) tube.

20. Remove the “O” ring from the (44) tube.

21. Pull upward on the (18) air cylinder until the (43) piston as­sembly separates from the (26) air motor base assembly. If the
(43) piston assembly is not pulled from the (26) air motor base
assembly, remove it after removing the (18) air cylinder.

22. Remove the (16) “O” ring from the (26) air motor base and
bearing assembly.

PARTS LIST / 66523-B

Item Description

1

Screw
Valve Piston (1) 92395

2



3 Pilot Insert (1) 90487



4 Valve Guide (2) 90481



5 Valve Plate (1) 90480



6 Valve Plate Gasket (1) 90482



7 Upper Gland (1) 91006



8

Washer (1) 91344



9 “U” Cup



Piston Adapter (1) 92393

10



11

Extension Rod (1) 90080



12

Washer (1) 91345



13 “O” Ring



Screw (1) 92218

14

“O” Ring

16



17

“O” Ring



Air Cylinder (1) 99398

18



19 Valve Rod (1) 90107-1



21 Retaining Ring



Nut

(1/2” - 20)

22
23 Bolt

Guide Washer (1) 92216

24



25 “U” Cup



26

Air Motor Base Assembly (1) 66525-1

“Smart Parts”, keep these items on hand in addition to the service kits for fast repair and reduction of downtime.



(size)

(#10 - 24 x 1/2”)

(3/16” x 1-3/8” o.d.)

(1/16” x 1-3/8” o.d.)

(1/8” x 8” o.d.)

(1/4” x 8” o.d.)

(2.630” o.d.)

(1/2” - 20 x 10-1/4”)

(1/4” x 1-3/4” o.d.)

(Qty) Part No. Item Description

(6) 95956827

(1) Y186-51

(2) Y325-26

(2) Y325-265
(1) Y325-443

28 Insert Spring Assembly (1) 65807



29 Valve Insert (1) 99202



Valve Guide (1) 90488

30



31

Air Motor Cap (1) 90078



Gasket (1) 90083-1

32



33

Valve Plate and Pin Assembly (1) 65756



34 Valve Plate Gasket (1) 90479



Head Assembly (1) 66524-1

35

36 “O” Ring



37 Washer (1) 90105



38

“O” Ring



39 Seal (1) 91007



40 Machine Screw



41 Lower Gland (1) 90114



42 “O” Ring



43 Piston Assembly (1) 62109-B



(3/32” x 7/8” o.d.)

(0.103” x 1.255” o.d.)

(1/16” x 7/16” o.d.)

44 Tube (1) 92215

Machine Screw

45



(1) Y147-237
(6) Y11-8-C
(6) 94046-1

46 Washer (8) 90084



47 Machine Screw



48 Lock Washer
49 Ground Lug (1) 93006

(1) Y186-24

Gadus S2 U1000 Grease Pack (2) 94833



Items included in Service Kit 66614



(size)

(#8 - 32 x 3/8”)

(#8 - 32 x 3/4”)

(1/4” - 28 x 3/4”)

(1/4”)

(Qty) Part No.

(2) Y325-115

(1) 91207

(4) Y136-85-S

(1) Y325-11

(8) Y19-89-S

(2) Y119-49-C
(2) Y14-416

23. Now remove the (21) retaining ring, (24) guide washer and
(25) “U” cup packing from the (26) air motor base and bearing
assembly.

24. (43) piston assembly is factory assembled and should not be
disassembled.

25. Remove the (17) “O” ring from the (43) piston assembly. CAU-

TION: Do not mar the nish on the piston rod.

26. Disassemble the (43) piston assembly from the (14) screw.

27. Unscrew the (19) valve rod from the (11) extension rod by
holding (19) valve rod with adjustable-type pliers and placing
a wrench on the ats provided at the top of the (11) extension
rod.

ASSEMBLY

NOTE: All threads are right hand. Inspect and replace old parts with
new parts as necessary. Look for deep scratches on metallic sur­faces. Replace all “O” rings upon reassembly. Lubricate all “O” rings
and “U” cups with Gadus® S2 U1000 grease upon reassembly.

Place (17) “O” ring onto the (43) piston.

1.
Place the (14) screw onto the (19) valve rod. The threaded end

2.
of the screw should be down, away from the threaded end of
the valve rod.
While holding the (19) rod assembly below the threads with

3.
locking type pliers, clean threads with solvent and apply Loc­tite® 271™ to the threads and attach the (11) extension rod.
Place the (19) valve rod into the hole in the end of the (43)

4.
piston assembly and screw the (14) screw into the (43) piston
assembly.
Thoroughly grease and install the (16) “O” ring in the (26) air

5.
motor base and bearing assembly.
Place the (25) “U” cup packing, (24) guide washer and (21) re-

6.
taining ring in the (26) air motor base and bearing assembly.

Grease and install (13) “O” ring on the (41) lower gland.

7.
Grease the bore in the (35) head assembly and insert (41)

8.
lower gland into the bore of the (35) head assembly with a
twisting motion.
Align the bolt holes in the (41) lower gland and (35) head as-

9.
sembly and secure with four (40) screws.
Push the (43) piston assembly through the (25) “U” cup pack-

10.
ing in the (26) air motor base and bearing assembly, being
careful not to damage the “U” cup packing.
Thoroughly grease the inside of the (18) cylinder.

11.
Apply grease to (17) “O” ring, then insert into the bottom of

12.
the (18) cylinder (see gure 5).
Push the (43) piston assembly to the top of the cylinder.

13.
Thoroughly grease and install the (42 and 16) “O” rings in the

14.
(35) head assembly.
Thoroughly grease the two (36) “O” rings and install one on

15.
each end of the (44) tube.
Press the (44) tube into the counterbored hole in the (26) air

16.
motor base and bearing assembly.
Push the (11) extension rod through the (42) “O” ring in the

17.
base of the (35) head assembly.
Align and press the (35) head assembly down until the (18)

18.
cylinder and (44) tube are seated in the head assembly.
Insert the six (23) bolts down through the holes in the anges

19.
of the (35) head assembly and the air motor base and bearing
assembly.
Screw the six (22) nuts on the six (23) bolts. Alternately and

20.
evenly tighten the nuts.
Thoroughly grease and install the (9) “U” cup packing in the

21.
(10) adapter, with the lips of the packing down toward the
thick ange of the (10) piston adapter.
Thoroughly grease and install the (38 and 13) “O” rings in the

22.
(7) upper gland.

Gadus® is a registered trademark of the Shell Oil Company  ARO® is a registered trademark of Ingersoll-Rand



Loctite® is a registered trademark of Henkel Loctite Corporation  271™ is a trademark of Henkel Loctite Corporation



Page 2 of 4 66523-B (en)

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(continued on page 4)