Lull 944E-42 Service Manual - Manual (Page 89)

3.41 Model 644E-42/944E-42 Rev. 6/04
Boom
11. If needed, pull the boom out slightly to align the
extend chain yoke (8) with the sheave (14). Route
the extend chain around the sheave (14) on the
intermediate boom. Coat the clevis pin (7) and clevis
bore hole with anti-seize compound. Connect extend
chain yoke (8) to the outer boom anchor bracket (16)
with the clevis pin (7). Secure the pin with two
retaining rings (6).
12. Coat the capscrew (2) with Loctite
®
242 (blue). At the
rear of the inner boom (1), attach the retract chain (4)
into the first hole in the anchor link (5) using one
capscrew (2) and one flat washer (3). Torque
capscrew to, 37 - 66 lb-ft (50 - 90 Nm).
13. Install the boom rear cover (17) using four
capscrews (18) and flat washers (19). Coat the
capscrews with Loctite
®
242 (blue). Torque to 21 - 38
lb-ft (29 - 52 Nm).
b. Retract Chain Removal and Replacement
1. Park the vehicle on a hard, level surface.
2. Fully retract the boom and raise the boom to a
horizontal position. Place the travel select lever in
the (N) NEUTRAL DETENT position, engage the
parking brake switch and shut the engine OFF.
3. Remove four capscrews (18) and flat washers (19).
Remove the boom rear cover (17). Leave the
clips (20) attached to the cover.
4. At the front underside of the boom, record the amount of
threads extending beyond the elastic locknut (22).
This measurement will be the starting point for
adjustment of the boom retract chain.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
5. At the front of the outer boom (21) remove the
locknut (22) and washer (23) securing the retract
chain (24) to the boom.
MU0170
17
18
18
19
19
18
19
20
19
MU1410
21
22
23
24