Lull 944E-42 Service Manual - Manual (Page 82)

Boom
3.34 Model 644E-42/944E-42 Rev. 6/04
15. Coat the threads of the threaded clevis (1) with
multi-purpose grease.
Note: Have a second person help with the installation of
the retract chain between the intermediate and outer
boom assemblies.
16. From the rear of the boom, one person should push
the threaded clevis end (1) under the chain sheave
and down between the intermediate boom (3) and
the outer boom. The person at the front of the boom
should pull the clevis using the string or wire (2)
attached to the clevis in Step 6. Push and pull the
threaded clevis down to the tab (4) at the front
underside of the outer boom.
17. The person at the front of the boom should guide the
threaded end of the clevis (1) through the hole in the
tab (4).
18. Remove the string or wire, and the threaded eye or
capscrew with flat washer, from the end of the clevis.
Once the threaded clevis is through the tab on the
outer boom:
19. Reassemble the flat washer (6), saved, and a new
elastic locknut (5) onto the threaded clevis (7). Tighten
the locknut until the threaded end of the clevis is
flush with the top of the locknut.
20. Tighten the elastic locknut (5) on the retract chain
clevis (7) until the amount of threads protruding
beyond the elastic locknut is the same as the
measurement recorded earlier during removal of the
retract chain.
21. Adjust chain tension. (Refer to Section 3.4.3, “Boom
Chain Tension Check.”)
22. After adjustment is complete, assemble the rear cover
to the rear of the outer boom. Coat the capscrews
with Loctite
®
242 (blue). Install the boom rear
cover (8) using four capscrews (9) and flat washers
(10). Torque 21 to 38 lb-ft (29 to 52 Nm).
MU3930
1
2
4
3
MU1410
5
7
6
MU0170
8
9
10
9
10
10
9
10