Lull 944E-42 Service Manual - Manual (Page 90)

Boom
3.42 Model 644E-42/944E-42 Rev. 6/04
6. Attach a threaded eye (2) or a flat washer tack
welded to a capscrew (3) to the retract chain
clevis (1). The outside diameter of the eye or flat
washer must be smaller than the diameter of the
threads on the clevis. The string or wire will be used
to pull the chain back through the boom during the
reassembly.
7. Attach a string or wire (4) to the threaded eye
(2 or 3) that was installed in Step 6. The string or
wire must be long enough to pull the clevis and chain
through the outer boom (5).
8. Remove two retaining rings (6) and clevis pin (7) to
disconnect the retract chain yoke (8) from the rear of
the inner boom (9). Lay the chain assembly flat
behind the inner boom.
9. From the rear of the boom, pull the retract chain out
of the rear of the boom.
10. Inspect wear and condition of the chains, clevis’,
chain sheaves, chain rods, clevis anchors and all
mounting hardware. DO NOT attempt to make any
repairs to the chain.
Note: Chains and clevis’ are wear items and experience
the same stress. DO NOT attempt to repair a chain.
Replace a stretched or damaged chain with a new part.
Note: Have a second person help with the installation of
the new retract chain between the intermediate and
outer boom assemblies.
11. Remove the string or wire from the old chain and
attach the string or wire to the new clevis.
MU3900
1
2
3
MU3930
4
5
MU1210
6
6
7
8
10
9