HOIST MAINTENANCE
CAUTION: Before disassembling any portion of the hoisting mechanism, the hook assembly must be lowered to the floor
level for support, then continue to lower until stopped by the bolted end of the chain. This should prevent the free fall of
the hook assembly or load chain when the load brake is disengaged.
Handwheel Side, Parts Service (Includes load brake)
(A)
Unscrew 4 screws to remove handwheel cover. Pull cover and lift hand chain from handwheel. chain will remain
looped through handwheel cover. If it is necessary to remove hand chain, find the unwelded link and bend open
for removal.
(B)
Unscrew 4 screws on gear cover and remove cover.
(C) Back out the square head set screw to permit removal of the spindle (smallest gear).
(D) Grasp handwheel and pull. After removal, the complete handwheel and brake assembly may be more
conveniently placed in a soft jawed vise for disassembly.
(E)
Remove cotter pin and unscrew (counter clockwise) the handwheel from spindle. See Fig. 2 Page 8 for
reassembly adjustment.
(F)
Lift off brake disc, ratchet, and second brake disc.
(G)
The pawl retaining ring and pawl spring nut should be removed to permit the pawl and pawl spring to be
disassembled. The pawl stud can be disassembled by turning counter clockwise.
(H) When reassembling, the smaller of the two brake discs is placed on the spindle last (against the handwheel
assembly).
Gear Cover Side Parts Service
(A)
Unscrew 4 screws on cover and remove cover.
(B)
Note the proper timing mark position of the two planet gears. See Figure 1 page 8.
(C) Back-out the square head set screw to permit the pinion cage with the two planet gears to be pulled from the load
shaft.
(D) The two planet gears are removed by pulling the cotter pins and slipping the shafts from the gears.
Reassembling: Mount planet gears in pinion cage with cotter pins in place. Align set screw hole in pinion cage with
cotter pins in place. Align set screw hole in pinion cage with the set screw hole in the drive shaft and time the
planet gears as illustrated in Fig. 1 Page 8.
Trolley Wheel Parts Service
(A)
To disassemble trolley wheels, back off axle nut, then force the axle toward center of hoist. The "C" washer
should be free of its retaining cup shaped washer. When the "C" washer is removed. the axle can be withdrawn.
CHESTER HOIST OIVISION * MONOGRAM INDUSTRIES * PHONE (216) 424-7248 * LISBON, OHIO, U.S.A. 44432
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