Lull 944E-42 Service Manual - Manual (Page 88)

Boom
3.40 Model 644E-42/944E-42 Rev. 6/04
4. At the rear of the inner boom (1), remove one
capscrew (2) and washer (3) securing the extend
chain (4) to the anchor link (5). Disconnect the
retract chain.
Note: The Extend Chain yoke (8) will not fit under the
chain sheave.
5. Remove two retaining rings (6) and clevis pin (7) to
disconnect the extend chain yoke (8) from the outer
boom (9). Lay the chain assembly flat against the
inner boom (10).
IMPORTANT: 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.
6. Remove the capscrew (12) and locknut (13) and
remove the sheave pin (15). Remove the
sheave (14) from the outer boom.
7. Attach a string or wire to the extend chain yoke (8).
The string or wire must be long enough to pull the
extend chain through the boom in between the inner
boom (10) and the intermediate boom (11).
8. Pull the extend chain out through the back of the
boom.
9. Reattach the string or wire to the new extend chain
and pull it through the boom between the inner boom
(10) and the intermediate boom (11).
10. At the front of the intermediate boom, coat the
sheave pin (15) and bore with anti-seize compound.
Coat the capscrew (12) with Loctite
®
242 (blue). Install
the sheave (14) into place and insert the sheave
pin (15), capscrew (12) and locknut (13). Torque
capscrew (12) to, 90 - 162 lb-ft (123 - 220 Nm).
MU0260
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MU0210
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9
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MU4860
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