SkyTrak 8042 Service Manual - Manual (Page 78)

Boom
3-40 6036, 6042, 8042, 10042, 10054
14. From the rear of the boom, have an assistant push
the threaded clevis end of the chain under the chain
sheave and down between the second and first
boom sections. Pull the front clevis using the string
or wire. Keep the chain to the right side of the boom,
push the threaded clevis down to the tab at the front
underside of the first boom section.
15. Have an assistant guide the threaded end of the
clevis through the hole in the tab.
16. Remove the string or wire from the end of the clevis.
17. Reassemble the flat washer and locknut onto the
threaded clevis. Tighten the locknut until the
threaded end of the clevis is flush with the top of the
locknut.
18. At the rear of the boom, place the retract chain up
and over the chain sheave. Place the clevis between
the two anchor plates.
19. If re-installing a used chain, insert the saved
shoulder bolt, in the same position in the plates and
clevis recorded during removal.
20. If installing a new chain, line up the hole in the clevis
with the second hole from the rear of the anchor
plates. Insert the shoulder bolt, saved during
removal of the old chain.
21. Secure the shoulder bolt in place with a locknut.
Tighten the locknut securely.
22. Tighten the locknut on the retract chain clevis until
the amount of threads protruding beyond the locknut
is the same as the measurement recorded during
removal of the retract chain.
23. Check and adjust retract chain tension. Refer to
Section 3.7.5, “Boom Chain Tension Check.”
24. Install the boom rear cover.
25. Properly connect the battery.
26. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
3.7.10 Extend Chains Removal and
Replacement (10054)
a. Second and Third 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
locknuts (16). Record the amount of threads
extending beyond the locknuts. This measurement
will be the starting point for adjustment of the extend
chains after installation.
6. Remove and replace the boom extend chains one at
a time. Remove the right side locknut and flat
washer holding the right side chain clevis to the
anchor plate.
7. At the front of the first boom section, remove the
capscrews (17) and locknuts holding the extend
chain clevis’ to the yoke plates.
MH1781
16
SH1811
17