Ingersoll-Rand 7792-A - Manual (Page 7)

Form 10590149-Edition 2 7
Upper Hook Disassembly
- Remove nuts (153), washers (152) and bracket (150).
- Drive out roll pin (147) - One-Ton Models. Roll pins
(155) and (154) - Two-Ton Models.
- Remove collar (143) and balls (144) - One-Ton
Models. Collar (116), thrust bearing (120) and bearing
races (119) - Two-Ton Models.
Upper Hook Assembly
Position hook on bracket (150).
Apply a liberal amount of grease to groove of collar (143) and
assemble eleven balls (144) to collar.
Slide collar and balls over shank of hook and secure with roll
pin (147) - One-Ton Models.
Apply a liberal amount of grease to thrust bearing (120) and
assemble thrust races (119) and bearing (120) to shank of
hook. Secure with roll pins (154) and (155) - Two-Ton
Models.
Assemble bracket (150), shafts (151), washers (152) and
nuts (153).
CAUTION
Do not over-tighten nuts (153); tighten 25 to 30 ft. Ibs.
torque.
Lower Hook Disassembly
1-Ton Models
- Remove snap ring (139).
- Slide snap ring (139) and sleeve (140) up on chain and
remove pin (146).
- Separate connector (142) from bucket (145) and
remove pin (141).
- Drive out roll pin (147) and remove hook from bucket
(145).
2-Ton Models
- Remove bolts (134), washers (133) and shrouds (130).
- Remove bolts (124), (129), washers (125), and
spacers (126).
- Remove shaft (128), spacers (127) and sheave (114).
- Drive out roll pins (118) and (117).
- Remove collar (116), thrust bearing (120), bearing
races (119) and hook (123).
Lower Hook Assembly
1-Ton Models
- Slide snap ring (139) and sleeve (140) on end of load
chain.
- Position end of load chain in connector (142) and
secure with pin (141).
- Assemble hook (149) to bucket (145).
- Apply a liberal amount of grease to groove of collar
(143) and assemble eleven balls (144) to collar.
- Assemble collar (143) over shank of hook and secure
with roll pin (147).
- Assemble bucket (145) to connector (142) and secure
with pin (146).
- Slide sleeve (140) over bucket (145) and secure with
snap ring (139).
2-Ton Models
- Assemble hook (123) to yoke (121).
- Apply a liberal amount of grease to thrust bearing
(120) and assemble bearing races (119) and thrust
bearing to collar (116).
- Assemble collar (116) over shank of hook and secure
with roll pins (117) and (118).
- Lubricate roller bearing of sheave (114) and assemble
bearing race (115) to sheave.
- Assemble spacers (127), sheave (114) and shaft (128)
to yoke (121).
- Assemble washers (125) and spacers (126) to bolts
(124) and (129) and secure bolts to shaft (128).
- Feed load chain around sheave - with weld of standing
links facing out from sheave and attach end of chain to
anchor bracket (112) with pin (111) and retaining rings
(110).
- Position shrouds (130) on lower hook assembly and
secure with washers (133) and bolts (134).