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13
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Item
Inspection method
Discard limit / criteria
Remedy
4. Flatness of friction
plate [37]
Check clearance with
straight gauge.
Clearance shall be uniform.
Internal part shall not be thicker than
external part.
Replace the part.
5. Wear and oil of
bushing [39]
Check radial thickness (t)
with slide calipers and oil
existence.
Radial thickness (t) shall be uniform. Oil
shall be contained. Refer to table below.
Replace the part.
Bushing (39)
t: Radial thickness
6. Wear and rust of
ratchet disc [38]
Check visually.
The tooth wear shall not be more than1.5
mm.
Replace the part.
Check visually.
No rust
Replace the part.
Lifting system
1. Wear and deformation
of load sheave [14]
Check visually.
No large wear, no deformation or no burr
due to load chain contact is permitted on the
surface of load chain pocket.
Replace the part.
2. Wear and flaw of gear
[25, 27]
Check visually.
Teeth shall be free from large wear flaw.
Replace the part.
Friction plate (37)
(Discard condition)
Internal
External
Load chain pocket
Load sheave (14)
Gear #2 (27)
Ball bearing (28)
Snap ring (26)
Load gear (25)
WLL
(t)
Normal thickness: t
(mm)
Discard limit (mm)
0.5, 1, 1.5, 3
3
2
2, 2.5, 5, 7.5,
10, 15, 20
4 3
