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Items to be checked every 3 or 6 months and to be regarded as important
Classes B and C
items from the viewpoint of safety.
Frequently used parts shall be checked every one to three months.
No.
Check item
1
Check the pushbuttons for damage.
Check the screws for looseness.
Electro-
Check the parts for wear and damage.
magnetic
Check that the gap between the cores is
2
brake
proper.
electro-
Check that the lining thickness is
magnet
proper.
Check that no pins have dropped.
Check that the diode (in the control box) for the
hoisting brake and the diode for the traversing
3
operation are not damaged. Also check that their
lead wires are not disconnected.
Check the pushbutton pendant cable and power
cable for external flaws. Check the messenger
4
and hanging wire for damage. Check the hanger
for disconnection.
Check that the wire rope has been lubricated.
5
Check the electromagnetic contactor, contacts,
6
insulated parts and mechanical parts for damage
and wear. Check the screws for looseness.
Check the overwinding limit switch and contacts
for wear. Check the clamping screws for
7
looseness.
Check the trolley wire for looseness and rust.
8
Check the wires.
Check the current collector for contact failure and
9
wear.
Check the traversing wheels and guide rollers for
10
wear.
Check the traversing brake for attraction, release
11
and coasting condition.
Check the rail for abnormal wear, loosened
seams, external flaws and cracks. Check the
clearance between the rail and the guide roller or
12
the wheel flange.
13
Check the hoisting brake resistor for damage.
Check the bolts for looseness.
14
The rules prescribe to prepare a monthly inspection sheet based on these items and store the
results for three (3) years.
Description
Check the inside and contacts.
Open the cover, and check.
Lubricate the sliding and revolving
parts.
Replace the brake disks with new ones.
Open the cover to check the diodes.
Check the leading-out ports.
Check the wire for sagging.
If the wire rope is dry, apply wire rope
oil.
Check visually.
Check that all the screws are tightened
firmly.
Check that the switch and the contacts
are tightened properly.
Check that the switch and the contacts
operate properly.
Check the rotation. Check the wire
connections for looseness.
Check the spring force.
Wear must be less than 5% of the
diameter and less than 50% of the
flange thickness.
Wear less than 5% in width and less
than 10% in thickness is allowed.
Clearance between the rail and the
guide roller or the wheel flange less
than the specified value is acceptable.
(Refer to "Installation on I-Beam".)
Check visually.
Check visually. Tighten the bolts
again.
- 35 -
Month
Date of
Problem
completion
and remedy
of repair
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