SkyTrak 8042 Service Manual - Manual (Page 189)

Boom
3.128 Model 8042, 10042, 10054 Legacy Rev. 03/04
If no string or wire was installed to the end of the
clevis:
18. From the rear of the boom, one person should push
the threaded clevis end (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.
19. The person at the front of the boom should guide the
threaded end of the clevis (1) through the hole in the
tab (3) using a Phillips screwdriver (4). Insert the
screwdriver through the hole in the tab and catch the
countersunk hole in the end of the clevis. Guide the
threaded clevis out as the person at the rear of the
boom pushes the retract chain forward.
Once the threaded clevis is through the tab on the
outer boom:
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
20. Reassemble the saved flat washer (5), and a new
3/4-16 elastic locknut (6) onto the threaded clevis (7).
Tighten the locknut until the threaded end of the
clevis is flush with the top of the locknut.
21. Tighten the elastic locknut (6) on the retract chain
clevis (7) until the amount of threads protruding
beyond the elastic locknut is the same as the
measurement recorded during removal of the retract
chain.
22. Adjust retract chain tension. (Refer to Section 3.7.3,
“Boom Chain Tension Check.”)
23. After adjustment is complete, assemble the rear cover
to the rear of the outer boom. At the rear of the outer
boom (8), position the rear cover (9) in place. Secure
the cover in place with the saved, 5/16" flat
washer (10), lockwasher (11) and thumbscrew (12).
Insert the thumbscrew through the bottom of the
outer boom and into the rear cover. Tighten the
thumbscrew securely to hold the cover in place.
MA9520
1
2
3
4
MA9510
5
6
7
MH5690
8
9
10
11
12