R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 122)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
122/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
8 Maintenance
The lifetime of the hoist is divided into Safe Working Periods (SWPs). At the beginning of the Safe
Working Period, a new hoist has an SWP% of 100. A Safe Working Period ends when the SWP% of the
hoist is zero. When a Safe Working Period ends, a General Overhaul (GO) must be conducted, after
which the hoist is assigned a new Safe Working Period, refer to the section 'General Overhaul, GO'.
During the SWP, the safe and efficient operation of the hoist is contingent on regular servicing.
!
For the safety carry out the inspection and servicing procedures for the hoist in accordance
with the table below.
!
To avoid any risk of spark with explosive proof hoists due to the friction of two mechanical
parts, it is important to follow strictly the maintenance intervals. The safety of the equipment
could be compromised if not.
8.1 Daily inspections
!
Carry out following daily inspection on start of each work shift. Do not use the hoist unless
it is in proper condition. Contact a service agent authorized by the manufacturer
immediately in case of doubts! The usage of a defective hoist can result in serious
damages, injuries or death.
1 Inspection of the wire rope
• Check the wire rope visually for kinking, crushing, corrosion, broken wires and broken
strands
• Check visually that the rope lays in the grooves of the drum and in the rope sheaves
2 Inspection of the hook block
• Check that the hook moves freely in every allowed direction
• Check the presence of the safety latch and it’s functioning
• Check the free and smooth rotation of the rope sheaves
3 Inspection of the hoist limit switch
• Verify that the upper limit switches operate properly
• Verify that the lower limit switch operates properly
4 Inspection of the pushbutton controller
• Check the pushbutton controller for cracks or other signs of wear in the housing, and for
loose or broken buttons
• Verify that all pushbuttons and switches correspond to their intended functions and
directions
• Check the operation of the emergency button.
#
Do not depress the emergency button while the hoist is running during this test. Instead,
depress the emergency button and verify that no movement can be activated with the
pushbuttons.