SkyTrak 8042 Service Manual - Manual (Page 190)

3.129 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
d. Expose Inner Boom 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 3.7.6, “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 (12), lockwasher (11) and
flat washer (10), holding the rear cover (9) to the rear
of the outer boom (8). 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. Start the engine, slowly extend the boom until the
clevis end (13) of the inner boom retract chain is
exposed on the under side of the primary
intermediate boom. Turn the engine OFF.
5. At the front underside of the primary intermediate
boom, record the amount of threads extending beyond
the elastic locknut (13). This measurement will be the
starting point for adjustment of the boom retract
chain.
6. Loosen the elastic locknut (13) far enough so that it
can be removed by hand.
7. If the chain clevis has a threaded hole on the
end (14), 17 gauge wire can be attached to the
retract chain clevis using a threaded eye (15) or a
flat washer tack welded to a capscrew (16). The
outside diameter of the eye or flat washer must be
smaller than the diameter of the threads on the
clevis.
OH0660
13
MH5950
14
15
16