Ingersoll-Rand 7700-E Series, Installation, Operation And Maintenance Instructions

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Disassembly
1. Remove housing cap, brake spring, brake wheel and components as outlined on Figure 11, p. 17 .
2. On 1/4 ton models, remove nuts (38910), releasing gear and bearing assemblies.
3. On 1/2 and 1 ton models, remove screws (Y194-44), nuts (33368), washers (Y1-516) and bolts (33369), releasing
support ring and gear assemblies.
4. Bearing (36546) and grease seal (37706) should be removed only for replacement.
Assembly
Note: Lubricate gears and bearings liberally with ARO 33153 grease when assembling.
1. Assemble grease seal (37706) and bearing (36546) to end plate, if removed.
2. On 1/4 ton models, assemble bearings (32325) and retaining rings (38908) to idler gears (38905) and secure to
end plate with screws (38907) and nuts (38910).
3. On 1/2 and 1 ton models, assemble wear plates (45909), gear assemblies and bushings to end plate and secure
with support ring, screws (Y194-44), bolts (33369), washers (Y1-516) and nuts (33368).
4. Assemble end plate to housing and secure with washers (30997) and screws (Y99-41).
5. Assemble brake wheel (33376) to splined end of motor spindle and secure with washer (Y117–416) and nut (Y12-
106).
6. Assemble steel balls (Y16-10) and screw (37701) into bracket. Position brake shoes (33387 or 33387-1) over brake
wheel and assemble brake spring (42982) over shoes, using brake spring spreader (33541).
7. Assemble housing cap over brake and secure with screws (Y19-113-C). Refer to “Brake Adjustment,” p. 14 .
Motor Section
Figure 14. MHP3435
INCLUDES Y178-73 ROLL PIN
1/8 ton Cylinder 49171
NOT INCLUDED IN MOTOR ASSEMBLY
33277 KEY
33373 SPINDLE
33235 BEARING (PAIRED)
Y325-154‘‘O” RING
33284 END PLATE
33272 SPACER (2)
34541 CYLINDER
CYLINDER 34032 (STANDARD DESCENT)
(EXTRA - FAST DESCENT)
43067BLADE (8)
Y325-12 "O" RING (2)
47653686001 WASHER
43068 ROTOR
47663336001 END PLATE
Y200-59 SCREW
TORQUE TO 90-110 IN. LBS.
MOTOR ASS'Y.
46076-STANDARD
46077-EXTRA-FAST
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*
*
Disassembly
1. Remove motor from housing as outlined on “Removal of Hoist,” p. 15 .
2. Remove screw (Y200-59) and washer (47653686001). Motor will now come apart.
Assembly
1. Assemble bearings (33235) and spacers (33272) into end plates.
Note: Bearings (33235) are paired flush face bearings, shielded on one side. The open or unshielded side must
be installed facing the end plate. Lubricate bearings with 33153 grease when assembling.
2. Assemble end plate (33284) together with bearing and spacer on large end of spindle shaft (33373) and slide up
to boss on shaft.
3. Assemble key (33277) into groove in spindle and assemble rotor with groove aligned with key on spindle.
4. Assemble cylinder over rotor to end plate and assemble blades (43067) to rotor.
5. Assemble end plate (47663336001) together with spacer and bearing. Secure with washer (47653686001) and
screw (Y200- 59). Hold spindle in a suitable holding device, being careful not to damage splines or threads on
end of spindle.
6. Assemble “O” rings (Y325-12) into end plate.
7. Assemble motor with “O” ring (Y325-154) into housing.
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