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

Installation

Frame Tilt Control Valve
31200079
1. (Ref. Fig. 7-3) Insert frame tilt control valve (Item 5) into control panel
(Item 3) with plugged ports on front of valve body facing forward.
2. Install two (6) starwashers (Item 6) and capscrews (Item 7) to secure
valve to control panel.
3. Install two (2) fittings (Item 8) into rear of valve body and position them
as previously noted. Torque fittings to 300–340 in-lbs (25–29 ft-lbs).
4. Install hydraulic hoses (Items 4 and 9) onto fittings. Torque nuts on 3/8"
hoses to 235–265 in-lbs (20–22 ft-lbs). Torque nuts on 1/4" hoses to
130–150 in-lbs.
5. Position control panel in operator's compartment and secure with six
(6) flatwashers (Item 1) and screws (Item 2).
6. Start engine and raise boom slightly. Tilt frame fully left and right
several times to purge trapped air from frame tilt hydraulic system.
7. Level frame, and cycle remaining controls to purge air from those
control circuits. Lower boom to ground, and shut off engine. Inspect for
hydraulic leaks and repair as necessary.
Frame Tilt and Oscillation
7-5