-I -
One
pitch
Sum of pitches
of five
links
2. Rust, damage,
deformation
Check visually.
Obvious rust (apply oil
as necessary).
Twists or cracks, nicks,
dents or gouges.
Remove rust.
Replace load chain. iii
Destroy old load
...
chain.
12
.
Item
I InspectionMethod
I
Discard Limit/Criteria
I
Measures
..
3. Hookflaws
I Checkvisually.
Deepflaws.
Replacethe hook.
4. Hook
I
Turnhook.
Hook does not turn
Replacethe hook.
movement.
smoothly.
5. Upper/lower
I
Checkvisually.
Loose or missing rivets,
I
Replacethe hook.
fixture damage
nuts or bolts.
(Fittings of 1,4
44,56,66,75)
6. Idlesheave
Holdthe load chain
Rotation is
W
I
Repair
T
rotation (55,61,
with both hands and
not smooth.
70)
turn the idle sheave
by moving the chain
up and down.
7. Hook Latch
Check visually.
Improper positioning and
Replace the latch or
(2,6,45,57,67,
does not work smoothly.
hook.
76.
LOAD CHAIN
(42)
1. Wear
Measure with slide
Measure the sum of pitches
Replace the chain.
calipers.
offive chain links and
check that the maximum
length is not exceeding
the values shown below in
Table2.
Table 2
Capacity
Sum of pitches of
Discard Limit
five links
(ton)
mm (in)
mm (in)
1/2
75.5 (2.972)
77.7 (3.059)
1,2
95.5 (3.760)
98.3 (3.870)
1 1/2,3,5
106.0 (4.173)
109.1 (4.295)
