Lull 944E-42 Service Manual - Manual (Page 91)

3.43 Model 644E-42/944E-42 Rev. 6/04
Boom
12. From the rear of the boom, one person should push
the threaded clevis end (11) of the retract chain under
the chain sheave (10) and down between the
intermediate boom and the outer boom. The person
at the front of the boom should pull the front
clevis (11) using the string or wire attached to the
clevis in Step 6.
13. Push the threaded clevis down to the tab (12) at the
front underside of the outer boom.
14. The person at the front of the boom should guide the
threaded end of the clevis (11) through the hole in
the tab (12).
15. Replace the retract yoke (8) on the rear of the inner
boom (9) with the clevis pin (7) and two retaining
rings (6).
16. Remove the string or wire from the end of the clevis.
17. Secure the threaded clevis in place with a new
elastic locknut (13) and washer (14). Tighten the
elastic locknut (13) until the amount of threads
protruding beyond the elastic locknut is the same as
the measurement recorded during removal of the
retract chain.
18. Adjust retract chain tension. (Refer to Section 3.4.4,
a. “Component/Assembly Verification.”)
19. Replace the rear cover on the rear of the outer boom.
Install the boom rear cover (17) using four capscrews
(15) and flat washers (16). Coat the capscrews with
Loctite
®
242 (blue). Torque capscrews (15) to,
21 - 38 lb-ft (29 - 52 Nm).
MU1410
11
14
12
13
MU0170
15
16
17
15
16
16
15
16