SkyTrak 8042 Service Manual - Manual (Page 123)

Boom
3.62 Model 8042, 10042, 10054 Legacy Rev. 03/04
Note: Record the location of the shoulder bolt (1) to
ensure correct installation.
9. At the rear of the boom, locate the two retract chain
anchor plates (2) holding the retract chain to the
inner boom just in front of the retract chain sheave
(3). Remove the elastic locknut (4) and shoulder bolt
(1) holding the retract chain clevis to the anchor
plates. Discard the elastic locknut and save the
shoulder bolt. The two anchor plates can remain in
place on the inner boom.
10. From the rear of the boom, pull the retract chain out
of the rear of the boom.
11. Inspect wear and condition of the booms, chains,
clevis’, chain sheaves, extend/retract cylinder, chain
rods, clevis anchors and all mounting hardware.
Replace a worn or damaged chain. DO NOT attempt
to make any repairs to the chain.
Note: Chains and clevis’ are wear items and experience
the same stress. 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’.
Note: Have a second person help with the installation of
the new retract chain between the intermediate and
outer boom assemblies.
If a string or wire was installed to the end of the
clevis:
12. If the new chain has a clevis with a threaded hole,
remove the string from the old chain and attach it to
the new clevis. If the new chain does not have the
threaded hole, you will need to pull the string out of
the boom and follow the instructions under the "If no
sting or wire was installed to the end of the
clevis:" heading.
13. Coat the threads of the threaded clevis (6) with multi-
purpose grease.
14. From the rear of the boom, one person should push
the threaded clevis end (6) of the retract chain (7)
under the chain sheave and down between the
intermediate boom and the outer boom. The person
at the front of the boom should pull the front clevis
using the string or wire (8) attached to the clevis in
step 6. Keep the retract chain (7) to the right side of
the boom, push the threaded clevis down to the
tab (9) at the front underside of the outer boom.
15. The person at the front of the boom should guide the
threaded end of the clevis (6) through the hole in the
tab (9).
16. Remove the string or wire from the end of the clevis.
If no string or wire was installed to the end of the
clevis:
17. Coat the threads of the threaded clevis (10) with
multi-purpose grease.
18. From the rear of the boom, one person should push
the threaded clevis end (10) of the retract chain (11)
under the chain sheave and down between the
intermediate boom and the outer boom. Keep the
retract chain (11) to the right side of the boom, push
the threaded clevis down to the tab (12) at the front
underside of the outer boom.
MH2550
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MA9440
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