Lull 944E-42 Service Manual - Manual (Page 131)

8-15 944E-42
Hydraulic System
c. Cleaning and Drying
If contaminated oil or foreign material is in the reservoir,
the reservoir can usually be cleaned.
Note: If a leak is suspected in the reservoir, contact your
local authorized Service Department.
To clean the reservoir:
1. Have a dry chemical (Class B) fire extinguisher near
the work area.
2. Remove the hydraulic reservoir drain plug, and
safely drain the hydraulic oil into a suitable container.
3. Clean the reservoir with a high pressure washer, or
flush the reservoir with hot water for five minutes and
drain the water. Dispose of contaminated water
properly.
4. Refill the reservoir with water until it overflows.
Completely flush the reservoir with water, empty and
allow to dry.
d. Assembly
The hydraulic oil reservoir is a one piece unit and cannot
be disassembled. The hydraulic filter, suction filter, filler
tube, sight gauge and temperature switch can be
removed and reused on the new replacement reservoir.
Dispose of old reservoir according to local regulations
concerning hazardous materials disposal.
e. Inspection
Note: If a leak is suspected in the reservoir, contact your
local authorized Service Department.
1. Inspect the reservoir thoroughly for any cracks,
slices, leaks or other damage.
2. With the reservoir removed from the machine, plug
all openings except one. Install a fitting and apply
approximately 1-1.5 psi (7-10 kPa) of air pressure
through the fitting. Check the reservoir for leaks and
apply a soap solution to the exterior and look for
bubbles to appear at the crack or damaged area.
f. Hydraulic Reservoir Installation
1. Slide the Hydraulic reservoir under the engine and
onto the frame.
2. Uncap and connect the previously labeled hydraulic
hoses to there appropriate locations.
3. Connect the temperature and filter pressure
switches.
4. Install the hydraulic reservoir support bracket.
5. Install the engine frame skirt.
6. Uncap and install the lower hydraulic suction hose.
7. Fill the reservoir according to specifications. Refer to
Section 2.4, “Fluid and Lubricant Capacities.”
8. Check reservoir for leaks.
9. Properly connect the batteries.
10. Install engine cover and close.