Lull 6K Service Manual - Manual (Page 335)

Boom and Transfer
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 6-85
14. (Ref. Fig. 6-86) Remove the hardware securing the hose tray
assembly(ies) (Items 4 and 9 and Items 22 and 23) to the boom
extension cylinder. This includes capscrews (Item 1), lockwashers
(Item 2), and flatwashers (Item 3). Remove the hose tray assemblies.
Note: The 6K-37 has one hose tray assembly and seventeen (17) sets of
hardware while the 644B-37 has two hose tray assemblies and thirty-four
sets of hardware.
15. (Ref. Fig. 6-86) Remove the three (3) flat head socket screws (Item 20)
securing the slide plate (Item 19) to the boom extension cylinder.
Remove the slide plate.
Installation, Boom Extension Cylinder
The following procedures describes installation of the boom extension
cylinder.
1. (Ref. Fig. 6-86) Apply thread locking compound to the flat head socket
screws (Item 20). Install the slide plate (Item 19) on the boom
extension cylinder using three (3) flat head socket screws. Torque the
flat head screws to 35 ft-lbs.
2. (Ref. Fig. 6-86) Apply thread locking compound to the capscrews
(Item 1). Install the hose tray assembly(ies) (Items 4 and 9 and Items
22 and 23) on the boom extension cylinder with seventeen (17)
flatwashers (Item 3), lockwashers (Item 2), and capscrews (Item 1) for
each assembly. Torque the capscrews to 156 in-lbs.
3. (Ref. Fig. 6-86) Install rear mount support (Item 12) on the cylinder
manifold with two (2) lockwashers (Item 11) and capscrews (Item 10).
Torque the capscrews to 200 ft-lbs.
4. (Ref. Fig. 6-86) Install hose mounting bracket (Item 5) on the cylinder
manifold with two (2) flatwashers (Item 8), lockwashers (Item 7), and
capscrews (Item 6). Torque the capscrews to 276 in-lbs.
5. Use suitable lifting devices to install the boom extension cylinder along
with the two hose carriers and hoses in the inner boom section.
6. (Ref. Fig. 6-83) Connect the two (2) carriage tilt and two (2) auxiliary
hydraulic hoses to the fittings in the boom. Torque the hose swivel nuts
to 50–58 ft-lbs.
7. (Ref. Fig. 6-81) Move the extension cylinder forward to make sure the
threaded portion of the cylinder rod is properly lined up with the
opening in the mounting block.
8. (Ref. Fig. 6-85) Secure the rear mount support to the outer boom
section with two (2) flatwashers, lockwashers, and capscrews. Torque
the capscrews to 200 ft-lbs.
9. (Ref. Fig. 6-82) Install two (2) carriage tilt hoses (Item 2), and two (2)
auxiliary hydraulics hoses (Item 1) to the connectors located on the
tube mount bracket. Torque the hose swivel nuts to 50–58 ft-lbs.
10. (Ref. Fig. 6-82) Install two (2) hoses (Item 3) to the boom extension
cylinder (Item 4). Torque the hose swivel nuts to 79–88 ft-lbs.