RELIEVE HYDRAULIC PRESSURE
Remove electrical control box cover from electrical control box and switch ELECTRIC toggle to
Using the hydraulic valve control levers, EXTEND AND RETRACT all hydraulic cylinders and
CHARGE HYDRAULIC SYSTEM
On electrical control box, switch ELECTRIC toggle to ON position.
Using the hydraulic valve control levers, FULLY EXTEND and RETRACT all hydraulic
cylinders and exercise winch.
Visually inspect hydraulic system component(s), hose(s), and connection(s) related to the
maintenance task for evidence of leaking fluid.
If leaking fluid is found, perform necessary (required) maintenance and repeat steps 1 through 3.
On electrical control box, switch ELECTRICAL toggle to OFF position.
PURGE AND FILL HYDRAULIC SYSTEM
Spilled hydraulic oil is very slippery. Be careful when entering
or working in area. Wipe up any spilled oil immediately. Failure
to comply may result in severe injury or death to personnel.
Hydraulic system contains approximately 18 gal (68L) of hydraulic oil. An
adequate container must be used to maintain purged fluid.
Fold COUPLED fifth wheel towing device onto prime mover using transport configuration
steps (1) through (9) (WP 0007). Do not remove pivot pins.
Remove plug and drain reservoir (Figure 115, WP 0065).
Loosen hydraulic hose from straight adapter on main valve assembly (Figure 107, WP 0059).
Remove hydraulic hose from elbow on reservoir (Figure 115, WP 0065).
Tighten hydraulic hose to straight adapter on main valve assembly (Figure 107, WP 0059).
Reinstall drain plug prior to filling reservoir.
Remove fill port plug. COMPLETELY fill reservoir with new oil (see WP 0039). Ensure return
line is draining into a suitable container. Loosely replace fill port plug.
MAST EXTEND mast to vertical position and remove pivot pin. Repeat step 6. MAST
RETRACT and lower mast until lower arrow is approximately 4 inches (101.6mm) below main