Lull 6K Service Manual - Manual (Page 513)

Frame Tilt and Oscillation
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 7-11
(Ref. Fig. 7-6) The following procedures are required to remove the frame
tilt cylinder.
1. Follow preparation procedures as outlined in Section 3.
2. Place blocks between frame and top of front axle. These will hold the
frame in place when the cylinder is removed.
3. Tag and disconnect two (2) hydraulic hoses (Item 9) at frame tilt
cylinder (Item 3). Cap hoses and fittings.
4. See warning and procedures on page 7-16 for releasing hydraulic
pressure in cylinder.
5. Remove nut (Item 18), lockwasher (Item 17), and capscrew (Item 16)
securing cylinder upper pivot pin (Item 15) to frame.
6. Remove capscrew (Item 14), lockwasher (Item 12), and lock pin
(Item 11) securing cylinder lower pivot pin (Item 13).
7. Place a sling around the cylinder and attach the sling to suitable lifting
equipment. Make sure sling and lifting equipment have sufficient
capacity. The frame tilt cylinder weighs approximately 200 pounds.
Using the lifting equipment, support the weight of the cylinder.
8. Remove upper pivot pin.
9. Remove lower pivot pin and shims (Item 8) (early production models
only).
10. Move cylinder out and up from the machine.
11. For models with the cylinder illustrated in View B, remove lower
bushing (Item 19) from front axle using bushing driver and hammer or
press. Inspect and, if damaged, discard bushing.
Installation
Frame Tilt Cylinder (Ref. Fig. 7-6) The following procedures are required to install the frame tilt
cylinder.
1. Prior to installation, lubricate upper and lower pivot pins with a light
coating of grease.
2. For models with the cylinder illustrated in View B, install new lower
bushing (Item 19) on front axle. Install bushing so that it is centered in
axle boss.
3. Using suitable lifting equipment, position upper cylinder pivot at frame
pivot. Install upper pivot pin so hole in pin is aligned with hole in frame
boss. Secure upper pivot pin with capscrew (Item 16), lockwasher
(Item 17), and nut (Item 18). Torque nut to 180 in-lbs.
4. If necessary (models with the cylinder illustrated in View A), install
mounting blocks on front axle as follows:
a. Install mounting block (Item 5) to front of axle with two (2)
capscrews (Item 4), lockwashers (Item 6) and nuts (Item 7). Torque
nuts to 150 ft-lbs.