M
AINTENANCE
8.12. Check lowering limiter
WARNING
Danger from chain fracture
If the buffers are damaged, inadmissibly high
loads may act on the chain upon actuation of the
lowering limiter. The chain may break.
I
Do not use the product
I
Have the product repaired (replace buffer)
1. Move the unloaded load hook until just short
of the lower end position.
2. Stop immediately before reaching the end po-
sition and then carefully (by repeatedly press-
ing the control element) move to the end posi-
tion.
3. The movement of the chain must be stopped
due to deformation of the buffer. The engine
will stall in the process.
4. Following successful testing, the buffer must
be unloaded.
8.13. 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 15: Four-tooth chain sprocket
z
a
min
x
max
4
19,0 mm
0,15 mm
5
19,3 mm
0,15 mm
z:
Number of teeth of the chain sprocket
a,x:
Limit dimensions after maximum permitted
wear
8.14. Check the chain guide and hook
mount
Check the chain guides for wear and when the
wear dimension of 0,9mm 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.
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Doc.-No.: VA058498-50-OM-EN-1021-62-2