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Monthly Inspection
The person responsible for maintenance of hoist shall check the following items directly touching
the hoist, and repair defective parts.
The time of inspection of each part shall be determined depending on importance from the
viewpoint of safety, difficulty in maintenance, frequency of uses, and wearability. The parts are
classified as shown below.
Items to be surely checked every month and to be regarded as important items from
Class A
the viewpoint of safety.
No.
Check item
Check that there are no obstacles within the
1
traversing range.
Check the stoppers on both the ends of rail
for deformation and missing, and check the
2
mounting bolts for looseness.
Check the ground lead of the pushbutton
pendant metallic casing for breakage,
check the screws for looseness, and check
3
the pushbutton cable through holes for
abnormalities.
State of the operation buttons
4
Check that the interlocks are complete.
Check the operation of the overwinding
limit switch lever.
5
Check the strands for breakage.
Check for wear.
Check for kink, deformation, and
corrosion.
Wire
6
rope
Check the frame fixing parts, pins,
and sheaves.
Check the terminal fitting inlet for
corrosion.
Check that the thrust ball bearing
rotates smoothly.
Check that the foot nut is
provided with loosening
preventive means.
Hook
7
Check the sheave for damage.
block
Check the sheave case and key
plate (nameplate) for damage and
looseness. Check the slinging
wire latch.
Description
Check that the load will not hit
against other articles.
If the metallic casing leaks, an
electrical shock can occur. Look
over the inside.
Check that the buttons return to
position smoothly.
If the pin has been dropped, the
switch lever will not function.
Check that the lever functions cor-
rectly. Check that the lever has
been properly adjusted.
Less than 10% of number of
strands in one twisted wire
7% or less of the nominal diameter
Kink, deformation, and corrosion
should not be allowed.
Stoppers, split pins, wear
Insufficient lubrication, breakage,
and corrosion on the root of the
rope
Check that the nut stopper is not
damaged.
Check the split pin and setscrew for
missing.
Check for flaws and wear of the
groove.
Check the clamping screws for
looseness and damage.
Check for backlash and spring
effect.
- 33 -
Month
Date of
Problem
completion
and remedy
of repair
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