Lull 944E-42 Operation Manual - Manual (Page 128)

126 Model 944E Origin 3/04
General Maintenance
B. Hydraulic Oil & Filter Change
(First 100 Hours - Filter Only)
(1000 Hour Intervals - Oil & Filter)
Change the hydraulic oil filter after the
first 100 hours of operation and change
the hydraulic oil and filter every 1000 hours of operation thereafter. The hydraulic
filter must be changed anytime the hydraulic oil filter restriction warning indicator
light on the front dash panel comes ON. See page 51 for the location of this light on
the front dash panel.
1. Level the vehicle, ground the attachment, place the travel select lever in
the (N) NEUTRAL DETENT position and engage the parking brake switch.
2. Fully retract all hydraulic cylinders and shut off the engine.
3. Unlatch and open the engine cover. Allow the oil to cool.
4. Clean around the hydraulic filter head cover (1). Loosen but do not remove
the washer head bolts (2) that secure the filter head cover to the hydraulic
filter housing (3).
5. Rotate the cover clockwise and remove the cover (1). Retain the o-ring
seal (4) located in the groove on top of the filter housing.
6. Remove the spring (5) from the top of the filter. Remove the filter (6) with
center assembly from the filter chamber.
7. Remove the center assembly (7) from the filter, discard the filter.
8. Inspect the inside of the filter chamber (8), if contamination is evident, the
chamber can be pulled straight out and cleaned. Be sure to retain the o-
ring (9) under the lip of the chamber. Reassemble the chamber and o-ring.
Be sure the chamber is seated tight against the inside of the filter housing.
9. Install a new filter (6) onto the center assembly (7). Push the filter all the
way on.
10. Insert the filter into the filter chamber (8) and seat completely over the tube
at the bottom of the chamber.
11. Reposition the spring (5) with the wide side up, on top of the filter.
12. Reposition the cover on top of the housing, rotate the cover counterclock-
wise into position under the washer head bolts. Torque all four washer
head bolts to 9 lb-ft (12 Nm).
WARNING:
DO NOT change the hydraulic oil or filter with the
engine running. Contact with moving parts can cause death or serious
personal injury.
100
OT0840
OU0530
OS0840
1000
OH2690