Skytrak 6042 Service Manual User Manual download pdf (Page 108)

Boom

3.62

Model 6042 Legacy Origin 7/02

Note: Record the location of the shoulder bolt

(Fig. 3-139, 4) to ensure correct installation.

9. At the rear of the boom, locate the two retract chain

anchor plates (Fig. 3-139, 1) holding the retract

chain to the inner boom just in front of the retract

chain sheave (2). Remove the elastic locknut (3) and

shoulder bolt (4) 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.

Figure 3-139 Retract Chain Anchor Plates

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

(Fig. 3-140, 1) with multi-purpose grease.

14. From the rear of the boom, one person should push

the threaded clevis end (Fig. 3-140, 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 front

clevis using the string or wire ( 2) attached to the

clevis in step 6. Keep the retract chain (3) to the right

side of the boom, push the threaded clevis down to

the tab (4) 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 (Fig. 3-140, 1) through

the hole in the tab (4).

Figure 3-140 Chain Clevis through Tab in Outer Boom

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

(Fig. 3-141, 1) with multi-purpose grease.

18. From the rear of the boom, one person should push

the threaded clevis end (Fig. 3-141, 1) of the retract

chain (2) under the chain sheave and down between

the intermediate boom and the outer boom. Keep

the retract chain (2) to the right side of the boom,

push the threaded clevis down to the tab (3) at the

front underside of the outer boom.

MH2550

MA9440

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Skytrak 6042 Service Manual User Manual Page 108

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