KITO ER020S - Periodic Inspection - Hook Wear and Fittings; Hook Wear Measurement; Hook Fittings and Swivel Operation

− 46 −
Class Item Inspection method Discard limit/criteria Remedy
Hoist & Trolley
(2) Hook wear Measure "b" and
"c" with slide
calipers.
NEVER use the hook if dimension
"b" or "c" becomes less than 90%
of normal.
Replace with new
hook if worn.
(3) Hook neck
deformation
(4) Hook swivel
operation
(5) Upper /
lower fitting
damage
Check visually.
Rotate hook.
Check visually.
NEVER use bent hook.
Hook turns smoothly.
No damage or deformation.
Rivets, bolts and nuts have not
loosened or become detached.
Replace with
new hook.
Replace with
new hook if it dose
not turn smoothly.
Replace with
new fittings if
damaged or
deformed.
Capacity
(kg or t)
b (mm) c (mm)
Normal Discard Normal Discard
125(H),250(S),250(H),500(L),500(S) 17.5 16 23.5 21
1(L), 1(M), 1(S) 22.5 20 31 28
1.5(S) 26.5 24 36.5 33
2(L), 2(M), 2(S) 29 26 40 36
2.5(S) 31.5 28 43.5 39
3(L), 3(S), 3(C) 34.5 31 47.5 43
5(L) 42.5 38 56 50