Lull 944E-42, Service Manual

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8.199 Model 644E-42/944E-42 Rev. 6/04
Hydraulic System
b. Service Brake Valve Reassembly
Note: Use new oiled o-rings as required. ALWAYS
replace seals, o-rings, gaskets, etc., with new parts to
help ensure proper sealing and operation. Lubricate
seals and o-rings with clean hydraulic oil.
Note: Torque all the fittings as specified in Section 2.3,
“Torques.”
1. Transfer the fittings to the new brake valve. Note the
orientation of each fitting before removing them.
2. Transfer the tee fitting (1) to the “T” port on the side
of the new brake valve.
3. Transfer the tee fitting with diagnostic nipple (2) to
the upper “A” port on the side of the new brake valve.
Tighten securely.
4. Transfer the tee fitting with elbow and diagnostic
nipple (3) to the lower “A” port on the side of the new
brake valve. Tighten securely.
5. Transfer the double elbow (4) to the upper pressure
port “P” on the side of the new brake valve. Tighten
securely.
6. Transfer the double elbow (5) to the lower pressure
port “P” on the side of the new brake valve. Tighten
securely.
c. Service Brake Valve Installation
1. Reinstall the brake valve into the dash. Refer to the
reassembly procedure in Section 4.3.5, “Brake Valve
and Service Brake Pedal,” for installation
procedures.
2. Start the engine and run at approximately one-third
to one-half throttle for about one minute without
moving the vehicle or operating any hydraulic
functions.
3. Inspect the service brake valve and connections for
leaks and check the level of the hydraulic fluid in the
reservoir. Shut the engine OFF.
Note: Check for leaks and repair as required before
continuing. Add hydraulic fluid to the reservoir as
needed.
4. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle, work area and tools.
WARNING:
Avoid prolonged engine
operation in closed areas with inadequate
ventilation. Failure to properly ventilate exhaust
fumes can result in death or serious injury.
WARNING:
Escaping hydraulic fluid
under pressure can penetrate the skin, causing
death or serious injury.