SkyTrak 8042 Service Manual - Manual (Page 188)

3.127 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
11. Measure the chain elongation. Measure across 17
pins (7), somewhere between the chain sheave and
where the chain is laying in the pan or on the tarp.
The maximum measurement allowed is 12.36"
(313 mm). If the measurement is more than 12.36"
(313 mm), the chain must be replaced. (Refer to
Section 3.7.6, “Boom Extend and Retract Chains
Removal and Replacement.”)
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’.
12. If the chain needs to be replaced, refer to Section
3.7.6, “Boom Extend and Retract Chains Removal
and Replacement.”
13. Lubricate the chain, while it is exposed, if it does not
need to be replaced. (Refer to Section 3.7.2, “Chain
Lubrication.”)
14. Coat the threads of the threaded clevis (8) with
multi-purpose grease.
Note: Have a second person help with the installation of
the retract chain between the intermediate and outer
boom assemblies.
If a string or wire was installed to the end of the
clevis:
15. From the rear of the boom, one person should push
the threaded clevis end (8) of the retract chain (9)
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 clevis using
the string or wire (10) attached to the clevis in step 6.
Push and pull the threaded clevis down to the
tab (11) at the front underside of the outer boom.
16. The person at the front of the boom should guide the
threaded end of the clevis (8) through the hole in the
tab (11).
17. Remove the string or wire, and the threaded eye or
capscrew with flat washer, from the end of the clevis.
MA9350
7
MA9440
8
9
10
11