R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 48)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5.16.1 Service
• Check the proper tripping point of upper limit function.
• Test safety limit switch function manually monthly.
• Check the wiring for loose connections.
5.17 Hook operated control limit switch (ø 303, 355, 406, 608 mm)
Hook operated limit switch trips hoisting movement when hook reaches the adjustable lever. Hook
operated limit switch can be automatic reset or manually reset. With automatic reset hoisting movement
is possible again after tripping as soon as hook has been lowered from the switching area. Hook
operated limit switch with automatic reset can be used as a working limit before standard upper limit
tripping height.
With manual reset hoisting movement is not possible before limit switch has been manually re-activated .
Hook operated limit switch with manual reset can be used as a back-up switch for the standard upper
limit. When manual reset limit is used as back-up switch and switch stops the hoisting movement,
function of rotating limit switch have to be checked and corrected before using the hoist again.
Hook operated limit switch increases hook approach (hook-rail distance). .
1
2
3
4
c_hols1a
1.Hoist
2.Limit switch
3.Limit switch lever
4.Hook
5.18 Pushbutton controller
Operating instructions for pushbutton controller are described in section “Using the pushbutton
controller”.