Manual

11 7
10) by sliding it out and remove locking ring (656-11B).
Remove washer (656-11A) and liftwheel gear (656-11).
Remove the liftwheel (656-8) and replace it. The liftwheel
(656-8) may require pressing out of liftwheel bearings.
Check the gears and other parts for excessive wear, cracks
and distortion. Replace parts as necessary and then
reassemble the unit in reverse to the order in which it was
d
isassembled. Install the load chain per manual section
“REPLACING LOAD CHAIN”, above. After the hoist is com-
pletely reassembled, it must be tested for proper operation
(See TESTING, page 8).
3. HANDWHEEL OVERLOAD CLUTCH ASSEMBLY: To inspect
or replace handwheel overload clutch assembly, it is necessary
to partially disassemble the hoist. Remove the handwheel
cap (656-36) and the handwheel cover support (656-35).
Lift off the handwheel cover (656-34A) and slide it down the
hand chain (656-31). Lift the hand chain out of the handwheel
(656-27) pockets. Remove cotter pin (656-33), castle nut (656-
30) and washer (656-29) from the drive shaft (656-10).
Remove handwheel overload clutch assembly by turning
handwheel (656-27) counter clockwise. Use spanner socket
tool (656-45, available from CM Corp.) to remove groove nut
(656-25) from handwheel brake hub (626-22). Slide Belleville
spring washer (656-24), pressure plate (656-23), front brake
disc (656-26), handwheel (656-27) and rear brake disc (656-
26) from handwheel brake hub (626-22). Inspect both brake
discs (656-26) and replace if excessive wear, scoring, glazing
or contamination is found. If brake disc is worn down to the
following thickness, replacement is required:
Capacity Thickness Min. (in)
1/2 –Ton, 1-Ton & 2-Ton .043
3-Ton, 5-Ton & 10-Ton .063
Inspect pressure plate (656-23), handwheel (656-27) and
handwheel brake hub (626-22) friction surfaces, replace
if excessively scored.
Replace parts as necessary and then reassemble the unit
in reverse to the order in which it was disassembled.
Once the handwheel overload clutch is assembled, tighten
the groove nut (656-25) with the spanner socket tool (656-45,
available from CM Corp.) to the following torque specification.
Capacity Torque (in-lb)
1/2 –Ton 31
1-Ton 71
2-Ton 106
3-Ton 128
5-Ton 106
10-Ton 142
These torque value will set the handwheel overload clutch
at approximately 125% of rated capacity. This setting must
be checked with the handwheel overload clutch assembled
into the hoist (See ADJUSTMENT OF LOAD LIMITER).
4. To inspect or replace the pawl or pawl spring, it is necessary
to partially disassemble the hoist. Remove the handwheel cap
(656-36) and the handwheel cover support (656-35). Lift off the
handwheel cover (656-34A) and slide it down the hand chain
(656-31). Lift the hand chain out of the handwheel (656-27)
pockets. Remove cotter pin (656-33), castle nut (656-30) and
washer (656-29) from the drive shaft (656-10). Remove hand-
wheel overload clutch assembly by turning handwheel (656-27)
counter clockwise. Remove retaining ring (656-42), pawl (656-
43), and pawl spring (656-44) from handwheel side plate
assembly (656-9). Inspect pawl (656-43) and pawl spring (656-
43) for wear, replace if worn. Replace parts as necessary and
then reassemble the unit in reverse to the order in which it was
disassembled. After the hoist is completely reassembled,
it must be tested for proper operation (See TESTING, page 8).
5. To replace hook latch, grind off head of rivet and drive it out.
Remove and discard the latch and spring. Attach the new
latch and spring using the roll pin provided in the latch kit.
ADJUSTMENT OF LOAD LIMITER
To adjust the load limiter:
1. Remove the hoist from the supporting structure and lay
it on a flat working surface with the handwheel facing up.
2. Remove the three screws securing the plastic center cap and
remove the cap (656-36) from the handwheel cover (656-34A).
3. Block the load chain by inserting a screwdriver or pin through
the load chain just below the hoist frame. Operate the hand-
wheel in the up direction to remove the slack from the load
chain, closing and locking the brake.
4. Change the adjustment of the load limiter by tightening the
groove nut (656-25) with the spanner socket tool (656-45,
available from CM Corp.) to increase the setting or by loosening
the groove nut (656-25) to decrease the setting.
5. Perform required load tests after adjustment. (See TESTING,
page 8). Revise the adjustment if necessary.
NOTE: The hoist should not be able to lift 150% of the
rated capacity load if the load limiter has been properly
adjusted.
6. Replace the center cap (656-36) in the handwheel cover (656-34A).
LUBRICATION
If hoist is disassembled for service, repair or inspection,
remove and clean existing grease from unit and replace
with approximately 1 oz. of Poliplex 2 (Century Lubricants Co.)
grease or equal lubricant to the exterior surface of the drive
shaft, gears, internal thread of brake hub, surface of liftwheel
bushings (1/2 ton unit), bushings in the gear side plate and gear
cover, internal and external surfaces of handwheel bushings and
rim of handwheel cover.