SkyTrak 8042 Service Manual - Manual (Page 111)

Boom
3.50 Model 8042, 10042, 10054 Legacy Rev. 03/04
c. Expose Retract Chain for Inspection
The retract chain must be removed from the boom in
order to be visually inspected. This must be done every
1000 hours or whenever the retract chain is removed
from the boom. (If removal of the chain is required refer
to Section 3.4.5, “Boom Extend and Retract Chains
Removal and Replacement.”)
While doing the chain inspection, check all chain clevis
ends for distortion or cracking and sheaves for bearing
wear or grooving from the chain.
If during the inspection, any chain is found to be damaged
or stretched, the chain must be replaced. It is
recommended that when any chain is replaced, that all
the chains and clevis’ be replaced at the same time.
1. Park the vehicle on a hard, level surface.
2. Fully retract the boom and raise the boom to a
horizontal position. Place the travel select lever in
(N) NEUTRAL, move the neutral lock lever to
NEUTRAL LOCK position, engage the parking brake
switch and shut the engine OFF.
3. Remove the thumbscrew (1), lockwasher (2) and flat
washer (3), holding the rear cover (4) to the rear of
the outer boom (5). Lift the rear cover straight up
until the capscrew in the top of the cover clears the
retaining hole in the top of the outer boom. Remove
the cover from the outer boom.
4. At the front underside of the boom, record the amount of
threads extending beyond the elastic locknut (6). This
measurement will be the starting point for adjustment
of the boom retract chain.
5. Loosen the elastic locknut (6) far enough so that it
can be removed by hand.
MH0850
4
5
1
2
3
MH1110
6
7
8