R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 37)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
37/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5.12.1 Assembling the manual crank
• Switch OFF the power supply to the hoist
• Remove fan cover (1)
• Remove retainer ring and fan (2)
• Install the crank (4) onto shaft gearing and tighten with bolt (3) to the shaft's centre thread.
• Screw the lever arm (5) into fork lever.
#
Hoist with 406 mm drum diameter and drum length H (1250mm) and J (1600 mm) the brake is
installed in the end of gearbox. Fork lever and crank should be assembled here.
5.12.2 Operating the manual crank
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It is preferred to use the manual crank only for lifting the load, or lowering very small loads.
Lowering heavy loads should be done by the manual brake release only (without the crank).
• Take strong hold to the crank by one hand
• Pull releasing lever (5) carefully with your another hand.
• Move load by rotating manual crank
!
Do not pull the lever too much and too abrupt, but open the brake with care. Sudden
unsuspected rotation of the crank can cause serious injury!
!
Do not let the motor gain too high speed. Release the lever immediately (closing the brake)
in case the motor, and thus the crank, starts rotating too fast or when the force to the crank
becomes too big for you too hold under control.
!
Do not let go of the crank before the brake is closed
5.12.3 Before normal operation of the hoist
• Remove manual crank (4)
• Remove the lever arm (5) from the lever
• Install fan and retainer ring (2)
• Install fan cover (1)
• Switch ON the power supply to the hoist
5.12.4 Assembly
For assembly instructions of the hoisting motor, refer to the section “Hoisting machinery, assembly”
and follow the instructions for removing and re-assembling the brake.
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In those models where the motor is located inside the drum, it is not possible to remove the brake
wires without extracting the complete motor-gearbox subassembly from the drum. In this case, it is
advised to cut the brake wires near the brake, and re-connect the wires to the new brake with a
proper screw- or shrink-connector. Do not use a plug-connection!