SkyTrak 8042 Service Manual - Manual (Page 83)

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Boom
18. Install the boom rear cover.
19. Properly connect the battery.
20. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
d. Fourth Boom Section Retract Chain 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. Start the engine and extend the boom until the
retract chain adjustment nut on the bottom of the
second boom section is visible. Shut the engine
OFF.
6. At the front underside of the boom, locate the retract
chain locknut. Record the amount of threads
extending beyond the locknut. This measurement
will be the starting point for adjustment of the retract
chain after installation.
7. Loosen the locknut (10) on the retract chain clevis.
DO NOT remove the locknut at this time, but loosen
the nut as far as possible to gain as much slack as
possible in the retract chain.
8. Return to the operator cab, start the engine and
slowly retract the boom all the way back, and then
extend the boom approximately 1 in (25 mm) or just
until all the tension on the retract chain is relieved.
Shut the engine OFF.
Note: Record the location of the shoulder bolt to ensure
correct installation.
9. At the rear of the boom, locate the two retract chain
anchor plates (11). The two anchor plates can
remain in place on the fourth boom section.
10. Pull the retract chain clevis toward the rear of the
boom, through the middle of the two center hoses on
the chain reel and over the top of the chain reel. Let
the clevis end of the retract chain hang out the rear
of the boom. Use a piece of wire that is
approximately 6 feet (1,8 m) long and tie it to the
clevis end of the retract chain. This wire will be used
to guide the chain back into the boom when the
boom is extended to expose the other end for
removal.
11. Have an assistant start the engine and slowly extend
the boom. Guide the retract chain with the wire
attached into the back of the boom. Extend the
boom until the retract chain adjustment nut on the
lower left side of the second boom section can be
accessed and removed. Turn the engine OFF.
12. Remove the locknut and flat washer holding the
threaded clevis on the retract chain to the tab in the
second boom section.
OH0661
10
MH2671
11
MH6510
12