Disassembly And Assembly; Removal Of Hoist; Head Section; Brake And Gearing Section - Ingersoll-Rand 7700-E Series Installation, Operation And Maintenance Instructions

Disassembly and Assembly

To minimize the possibility of ports damage and for convenience, the steps for disassembly or reassembly listed on
the following pages are recommended.

Removal of Hoist

1. Lower and disconnect load from hoist.
2. Shut off air at source and operate hoist control to bleed air from hoist and line.
3. Disconnect air hose at inlet swivel (on pendant control models, remove pendant control hoses) and remove
hoist from overhead suspension.
4. If chain basket is being used, remove from hoist.
5. Drain oil from reservoir in head.
6. Remove trolley from hoist housing.
7. Place hoist upside-down in vise and clamp on upper mounting on housing.
8. If hoist is to be completely disassembled, it is recommended the load chain be removed. For removal of chain,
refer to "Removal and Installation of Load Chain," p.

Head Section

1. Remove roll pin (Y178-56) from gear (34022) and control rod (34021).
Note: If head assembly is not to be disassembled, control rod may be removed with head, thereby making it
unnecessary to re-time gear (34022) with throttle valves (see
head, remove roll pin (Y178-55) from control arm (37719), remove roll pin (Y178-60) from brake block
(34029) and remove brake block.
2. Remove screws (Y154-54) and washers (Y14-10).
3. Remove head assembly from housing.

Brake and Gearing Section

1. Remove screws (Y19-113-C) and housing cap assembly.
2. Slide brake spring (42982) part way off brake shoes (33387 or 33387-1) and remove spring with brake spring
spreader (33541). This will release brake shoes and steel balls (Y16-10).
3. Place a pin through hole in brake wheel (33376) to keep from turning and remove nut (Y12-106) and washer
(Y117-616). Remove brake wheel.
4. Remove roll pin (Y178-60) from brake block (34029) and remove brake block from control rod (34021).
5. Remove screws (Y99-41) and washers (30997) and remove gearing assembly.

Motor Section

1. After removal of head assembly, housing cap, nut (Y12-106) and washer (Y117-616); motor assembly may be
removed from housing.

Housing Section

1. Follow disassembly procedures as outlined in head section, brake and gearing section and motor section.
For further disassembly of sections, see pages 18 to 29.
13.
Figure 10, p. 16). To remove control rod with
15