SkyTrak 8042 Service Manual - Manual (Page 80)

Boom
3-42 6036, 6042, 8042, 10042, 10054
24. At the rear of the boom, tighten the two locknuts on
the chain clevis’ until the amount of threads
protruding beyond each locknut is the same as the
measurement recorded during removal of the extend
chains.
25. Check and adjust the retract chain tension. Refer to
Section 3.7.5, “Boom Chain Tension Check.”
26. Install the boom rear cover.
27. Properly connect the battery.
28. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
b. Fourth Boom Section Extend Chains Removal
and Replacement
1. Park the machine on level ground. Place the
transmission control lever in (N) NEUTRAL, engage
the parking brake switch, level the boom and shut
the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Properly disconnect the battery.
4. Remove the boom rear cover.
5. At the rear of the boom, locate the extend chain
locknut (1). Record the amount of threads extending
beyond the locknut. This measurement will be the
starting point for adjustment of the extend chain after
installation.
6. Remove the locknut and flat washer holding the
extend chain clevis to the anchor plate on the boom.
7. At the front of the boom, disconnect the extend chain
clevis from the anchor plates on the second boom
section. Remove the locknut holding the shoulder
bolt (2) to the anchor plates. Pull the extend chain
clevis from between the plates and lay over the front
of the fourth boom section (3).
8. Remove the locknut and capscrew holding the
extend chain sheave to the front of the third boom
section.
9. Inspect the sheave pin for corrosion or damage. If
the pin is damaged, it should be replaced. Minor
corrosion can be repaired with fine emery cloth.
Save the chain sheave, pin and capscrew.
10. At the rear of the boom, attach one end of a wire to
the threaded clevis (4) on the extend chain with a
threaded eye or a flat washer tack welded to a
capscrew. The outside diameter of the eye or flat
washer must be smaller than the diameter of the
threads on the clevis.
11. Have an assistant pull the chain from the front of the
boom while guiding the wire into the boom from the
rear. Remove the wire from the clevis, but not from
inside the boom.
MH1781
1
MH1791
3
2
MH6510
4