Lull 1044C-54 Series II Service Manual - Manual (Page 204)

Boom and Transfer
6-62 31200079
installation
4-Section Boom 1. Prepare replacement boom for installation by removing strapping and
blocks used for shipment. Note location of straps and blocks for use on
the previously removed boom.
2. With the replacement boom still lying upside down, the front carriage
tilt cylinder should be installed at this point. It is easier to install when
the boom is in this position. See page 6-20
3. Attach slings/chains to the boom and crane. Lift the boom and rotate it
to the upright position.
4. Position the boom over the transfer carriage/boom cradle. Carefully
lower boom and align boom pivot boss with the matching bosses in the
transfer carriage/boom cradle.
5. (Ref. Fig. 6-66) Partially insert two (2) boom pivot pins to temporarily
secure the boom pivot. Check gaps between boom pivot boss and the
matching bosses in the transfer carriage/boom cradle. Select
appropriate shim sizes to center the boom in the transfer
carriage/boom cradle.
6. (Ref. Fig. 6-66) Slide the boom pivot pins out one at a time and insert
the required shims. Fully insert the boom pivot pins.
7. (Ref. Fig. 6-61) Align rod-end of a boom hoist cylinder with the
matching boss on the boom. Insert pivot pin and secure with lock pin,
lockwasher, and capscrew. Repeat this procedure for the other hoist
cylinder and rear carriage tilt cylinders.
8. The slings/chains and crane may be removed at this point.
9. (Ref. Fig. 6-61) Connect the two (2) auxiliary hydraulic hoses and two
(2) carriage tilt hoses to the rear of the boom.
10. Connect the two (2) hoses to the boom extension cylinder lines.
11. Lubricate all pivot grease fittings with EP lithium based grease.
12. Install boom extension proximity switch. See Step 9 on page 6-128.
13. Install boom elevation proximity switch in transfer carriage/boom
cradle. See “Boom Elevation Proximity Switch” in Section 7.
14. Install quick attach assembly to boom. See page 6-45.
15. (Ref. Fig. 6-66) Start engine and extend the boom approximately eight
inches. Shut engine off. Secure pivot pins with two (2) capscrews,
lockwashers, and nuts. Torque nuts to 110 ft-lbs.
16. Start engine and cycle the frame tilt fully several times.
a. Raise the boom, noting that Rear Osc Lock light illuminates when
boom is at about 40° elevation. If light does not illuminate, stop and
lower the boom. Follow procedures for under “Boom Elevation
Proximity Switch” in Section 7.
b. Complete proximity switch adjustment before proceeding to
Step 17.
17. Cycle all boom hydraulics several times to remove air from system.