SkyTrak 6042 Service Manual - Manual (Page 98)

Boom
3.52 Model 6042 Legacy Origin 7/02
11. Measure the chain elongation. Measure across 17
pins (Fig. 3 -110, 1), somewhere between the chain
sheave and where the chain is laying in the pan or
on the tarp. The maximum measurement allowed is
12-3/8" (313 mm). If the measurement is more than
12-3/8" (313 mm), the chain must be replaced.
(Refer to Section 3.4.5, “Boom Extend and Retract
Chains Removal and Replacement.”)
Figure 3-110 Retract Chain Exposed for Inspection
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
3.4.5, “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 3.4.2, “Chain
Lubrication.”)
14. Coat the threads of the threaded clevis
(Fig. 3-111, 1) 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 (Fig. 3-111, 1) of the retract
chain (3) 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 ( 2) attached to the clevis in
step 6. Push and pull the threaded clevis down to the
tab (4) 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 (Fig. 3-111, 1) through
the hole in the tab (4).
Figure 3-111 Chain Clevis through Tab in Outer Boom
17. Remove the string or wire, and the threaded eye or
capscrew with flat washer, from the end of the clevis.
MA9350
1
MA9440
3
1
2
4