Lull 944E-42 Service Manual - Manual (Page 117)

4.13 Model 644E-42/944E-42 Rev. 6/04
Cab and Covers
6. Remove the two capscrews (4), flat washers (5) and
nuts (6) attaching the service brake valve (7) to the
steering column support (8). Remove the service
brake valve (7) through the lower dash panel
opening.
b. Brake Valve Installation
Note: DO NOT disassemble the service brake valve.
The service brake valve is not serviceable and must be
replaced as a unit.
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 fluid.
Note: Torque all the fittings as specified in Section 2.3,
“Torques.”
1. Transfer the fittings (9) to the new brake valve. Note
the orientation of each fitting before removing them.
2. Install the service brake valve (7) through the lower
dash panel opening. Mount the brake valve to the
steering column support (8) inside the dash. Attach
the brake valve with two capscrews (4), flat washers
(5) and flange nuts (6).
3. Attach the hydraulic hoses to the service brake
valve.
4. Check the routing of all hoses, wiring and tubing for
sharp bends or interference with any rotating
members, and install tie wraps and/or protective
conduit as required.
5. 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.
6. 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.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle work area and tools.
Note: Refer to Section 8.7, “Hydraulic System Testing,”
for complete testing procedure.
MU3411
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4
6
7
8
5
9
MU3500
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:
Wait for the hydraulic fluid
to cool before servicing any hydraulic component.
Hot hydraulic oil can cause severe burns.