Installation - JLG Lull 1044C-54 II Series Service Manual

Frame Tilt and Oscillation

Installation

Frame Tilt Cylinder
7-10
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.
(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.
b. Install mounting block (with lock pin hole) (Item 10) to rear of axle
with two (2) capscrews (Item 4), lockwashers (Item 6), and nuts
(Item 7). Make sure the lock pin hole is to the rear of the machine.
Torque nut to 150 ft-lbs.
5. Position lower cylinder pivot on axle to install lower pivot pin. Install
lower pivot pin (Item 13) and shims (Item 8) (early production models
only).
6. Secure pin with lock pin (Item 11), lockwasher (Item 12), and capscrew
(Item 14). Torque capscrew to 55 ft-lbs.
7. Attach hydraulic hoses (Item 9) to fittings on cylinder. Torque hose
swivel nuts to 235–265 in-lbs.
8. If necessary, install grease fittings (Item 2) and grease fitting covers
(Item 1) as shown in Fig. 7-6. Torque grease fitting 1.5–3 turns past
finger tight.
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