M
AINTENANCE
8.15. Check chain sprocket
NOTICE
If the wear dimensions of a chain sprocket are
outside of the limit dimensions indicated below,
then the chain sprocket is to be replaced.
Figure 16: Four-tooth chain sprocket
z
a
min
x
max
4
38,5 mm
0,30 mm
z:
Number of teeth of the chain sprocket
a,x:
Limit dimensions after maximum permitted
wear
8.16. Check the chain guide and hook
mount
Check the chain guides for wear and when the
wear dimension of 1,7mm is reached with regard
to chain guide diameters or hook mounts in the
centre section of the device: Replace the housing.
The wear dimension must be measured at the
points on the guide surfaces which have been
worn down by the chain.
8.17. Check the hook, shackle and
eyelets
Check load and support hook
If the dimension
x
,
y
or
h
of the load hook (support hook) is outside
of the limit value, the hook must be replaced.
Figure 17: Check dimensions of load hook (sup-
port hook)
Dimension
x
max
Dimension
y
min
Dimension
h
min
116,2 mm
82,0 mm
71,0 mm
Doc.-No.: VA049318-20-OM-EN-0319-64-6
Page
55
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