SkyTrak 8042 Service Manual - Manual (Page 187)

Boom
3.126 Model 8042, 10042, 10054 Legacy Rev. 03/04
4. At the front underside of the boom, record the amount of
threads extending beyond the elastic locknut (1). This
measurement will be the starting point for adjustment
of the boom retract chain.
5. Loosen the elastic locknut (1) far enough so that it
can be removed by hand.
6. If the chain clevis has a threaded hole on the
end (4), a string or wire can be attached to the
retract chain clevis using a threaded eye (5) or a flat
washer tack welded to a capscrew (6). The outside
diameter of the eye or flat washer must be smaller
than the diameter of the threads on the clevis. The
string or wire will be used to pull the chain back
through the boom during the reassembly.
If there is no threaded hole on the end of the clevis, a
phillips screwdriver will be needed to catch the
countersunk hole in the end of the clevis and guide it
through the tab during reassembly.
7. Remove the elastic locknut (1) and flat washer (2)
holding the retract chain threaded clevis (3) to the
mounting tab. Save the flat washer and discard the
elastic locknut.
8. If a threaded eye or capscrew with flat washer
(5 or 6) was installed in step 6, attach a string or wire
to the end of the retract chain clevis. The string or
wire must be long enough to pull the clevis and chain
through the outer boom.
9. Place a pan or tarp, free of dirt, at the rear of the
vehicle, for the chain to rest on as it is being
removed from the boom. From the rear of the boom,
pull the retract chain out of the rear of the boom.
10. With the chain hanging from the rear of the boom,
inspect wear and condition of the chain, clevis’, chain
sheaves, chain pins, clevis anchors and all mounting
hardware. Replace a worn or damaged chain. DO
NOT attempt to make any repairs to the chain.
Note: DO NOT attempt to repair a chain. Replace a
stretched or damaged chain with a new part. Always
replace both the chain and the clevis. It is recommended
that when any chain is replaced, that all chains and
clevis’ be replaced at the same time.
MH1110
1
2
3
MA9430
4
5
6