Lull 6K Service Manual - Manual (Page 322)

Boom and Transfer
6-72 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
CAUTION: Make sure slings and chains are secure and crane is
supporting the weight of the boom.
14. (Ref. Fig. 6-70) Using the slide hammer puller, remove the two (2)
boom pivot pins and shims (Item 5).
15. (Ref. Fig. 6-70) Carefully lift the boom assembly (Item 7) clear of the
transfer carriage/boom cradle (Item 6).
16. Swing the boom away from the machine and position it above a firm,
level surface.
Installation
2-Section Boom 1. Using slings/chains and a crane, position the boom over the transfer
carriage/boom cradle. Carefully lower the boom and align the boom
pivot bosses with the matching bosses in the transfer carriage/boom
cradle.
2. (Ref. Fig. 6-70) Partially insert the two (2) boom pivot pins (Item 3) to
temporarily secure the boom pivot. Check gaps between the 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.
3. Slide the boom pivot pins out one at a time and insert the required
shims. Fully insert the boom pivot pins. Apply thread locking
compound to the capscrew. Secure the pivot pins with two (2)
capscrews, lockwashers, and nuts.
4. (Ref. Fig. 6-69) Align rod-end of a boom hoist cylinder with the
matching boss on the boom. Apply thread locking compound to the
capscrew. Insert pivot pin and secure with lock pin, lockwasher, and
capscrew. Repeat this procedure for the other hoist cylinder and rear
carriage tilt cylinders.
5. The slings/chains and crane may be removed at this point.
6. (Ref. Fig. 6-68) Connect the two (2) auxiliary hydraulic hoses and two
(2) carriage tilt hoses to the rear of the boom.
7. Connect the two (2) hoses to the boom extension cylinder.
8. Lubricate all pivot grease fittings with EP lithium based grease.
9. Install boom elevation proximity switch in transfer carriage/boom
cradle. See “Boom Elevation Proximity Switch” in Section 7.
10. Install quick attach assembly to boom. See page 6-59.
11. Start engine and cycle the frame tilt fully several times. 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 adjustment under “Boom Elevation
Proximity Switch” in Section 7. Complete proximity switch adjustment
before proceeding to Step 12.