Ingersoll-Rand 70P3, Operation And Maintenance Manual, Page: 17 / 23

17
MAINTENANCE SECTION
Disassembly of the Impulse Mechanism
1. Use a hooked wire to pull the Retaining Pin Spring
(55) out of the end of the Drive Shaft (53) and
remove the Socket Retaining Pin (54).
2. Remove the Rubber Grip (23).
3. Using a hex wrench, remove the four Cap Screws
(71) and Lock Washers (72). Lift the Mechanism
Cover (66) off the Motor Housing (1) over the Drive
Shaft (53). Remove the Mechanism Cover Gasket
(70).
4. Lift the assembled mechanism off the Rotor (29).
Remove the Bushing Spacer (69).
5. With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism. As an alternate method, using the
syringe from the Fluid Replacement Kit
(Part No. EQ106S–K400), purge the fluid from the
first cavity. Then rotate the Drive Shaft to expose
the second cavity and purge the fluid using the
syringe.
6. Grasp the flats of the Housing Assembly (38) in vise
jaws with the output end of the Drive Shaft
downward.
7. Insert the pins of the spanner plug from the
No. 70P3–199 Tool Kit into the two holes in the
Housing Cap (44). Using a wrench on the plug,
unscrew and remove the Housing Cap from the
Housing Assembly. (Refer to Dwg. TPD1267)
SPANNER PLUG
COUNTERCLOCKWISE TO LOOSEN
(Dwg. TPD1267)
8. Stand the disassembly arbor from the Tool Kit, large
end downward, on a workbench or the table of an
arbor press. Insert the output end of the Drive Shaft
into the central opening and either tap the Housing
downward off the components or use the pressing
sleeve in the Kit to press the Housing downward off
the components. (Refer to Dwg. TPD1268)
PRESSING
SLEEVE
HOUSING
TAP EDGE LIGHTLY
WITH BRASS HAMMER
OR USE PRESSING
SLEEVE FROM TOOL
KIT
DISASSEMBLY ARBOR
FROM TOOL KIT
(Dwg. TPD1268)
9. Disassemble the components of the mechanism in the
sequence shown in Drawing TPA1560 on Page 13.
Disassembly of the Motor
1. Grasp the Motor Housing (1) in vise jaws with the
Motor Housing Cover (35) up.
2. Remove the Motor Housing Cover Bolts (37).
Remove the Motor Housing Cover (35) and Motor
Housing Cover Gasket (34) from the Motor
Housing.
3. Secure the Motor Housing in vise jaws with the mo-
tor bore in a horizontal position and handle pointing
down. Using a plastic hammer, lightly tap the Hous-
ing surrounding the motor bore to loosen the motor.
From the front of the Housing, push on the Rotor (29)
until the assembled motor begins to slide out of the
rear of the Motor Housing. Grasp the Rear End Plate
(24) and pull the assembled motor from the Motor
Housing.
4. Remove the Front End Plate (31), Front End Plate
Bearing (32), Cylinder Assembly (27) and Vanes (30)
from the Rotor.
5. On the table of an arbor press, support the Rear End
Plate (24) with blocks as close to the Rotor as pos-
sible and press the Rotor out of the Rear End Plate
and Rear Rotor Bearing (25).
6. To remove the Rear Rotor Bearing from the Rear End
Plate, use a small drift or pin punch through the cen-
tral opening of the Rear End Plate to tap the Bearing
out of the End Plate. (Refer to Dwg. TPD1271)
Do not enlarge or damage the shaft hole in the
End Plate.