Lull 6K Service Manual - Manual (Page 369)

Boom and Transfer
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 6-119
50. Turn the inner boom upside down.
51. (Ref. Fig. 6-125) Remove the capscrew (Item 14), lockwasher
(Item 13), and lock pin (Item 12) securing the base end pin (Item 11) to
the inner boom section.
52. (Ref. Fig. 6-125) Remove the base end pin and the front carriage tilt
cylinder.
53. (Ref. Fig. 6-125) Remove the two (2) quick attach pivot pin bushings
(Item 16) from the inner boom section.
Assembly and Installation
3-Section Boom 1. With the inner boom section upside down, install new quick attach pivot
pin bushings until they are flush with the outer edge of the tube of the
inner boom section.
2. Clean and inspect the bushings in the front carriage tilt cylinder. If
necessary, replace them as instructed in Step 10 on page 6-21.
3. Install the front carriage tilt cylinder as described under “Installation” on
page 6-19.
4. Turn the inner boom section over to an upright position.
5. (Ref. Fig. 6-125) Secure the hydraulic tubes (Items 3 and 5) in the
channels located inside the inner boom section using cushion clamps
(Item 2).
6. (Ref. Fig. 6-125) Attach the auxiliary hydraulic hoses (Item 1) to the
auxiliary hydraulic tubes and the carriage tilt hydraulic hoses (Item 4)
to the carriage tilt hydraulic tubes. Torque the swivel nuts on the hoses
to 50–58 ft-lbs.
Note: “K” Model machines are not equipped with auxiliary hydraulics. For
these models, disregard procedures that refer to auxiliary
components. Some models are equipped with an additional set of
auxiliary hydraulics and will have two (2) additional sets of hoses,
tubes, and mounting hardware.
7. (Ref. Fig. 6-125) Connect the auxiliary hydraulic hoses (Item 1) to the
quick disconnect coupler(s) (Item 7). Torque the hose swivel nuts to
44–48 ft-lbs.
8. (Ref. Fig. 6-125) Connect the carriage tilt hydraulic hoses (Item 4) to
the connectors on the front carriage tilt cylinder (Item 10). Torque the
hose swivel nuts to 50–58 ft-lbs.
9. (Ref. Fig. 6-125) Install the quick disconnect coupler(s) (Item 7) to the
inner boom section with the capscrew (Item 6), lockwasher (Item 8),
and nut (Item 9). Torque the nut to 55 ft-lbs.