Lull 944E-42, Service Manual

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4.9 Model 644E-42/944E-42 Rev. 6/04
Cab and Covers
12. Start the engine and check the operation of steering
system. Check for hydraulic fluid leaks. Check the
hydraulic fluid level in the tank and add fluid as
required.
13. Install the lower dash panel (9). Secure in place
using five capscrews and flat washers. Torque to
7 - 10 lb-ft (9,5 - 10,6 Nm).
4.3.4 Steer Select Valve
With the three-mode Steer Select Valve, the vehicle can
be used in the front-wheel, four-wheel or crab steering
modes. The steer select valve (10) controls the direction
of hydraulic fluid flow to the steering cylinders mounted
on each axle. The steer select valve (10) is located inside
the front dash on the upper left side.
The steer select valve (10) is not serviceable and must be
replaced with a new part if defective.
a. Steer Select Valve Removal
1. Park the vehicle on a firm, level surface, fully retract
all hydraulic cylinders, ground the attachment (if
any), place the travel select lever in the (N)
NEUTRAL DETENT position, engage the park brake
switch and shut the engine OFF.
2. Unlatch and open the engine cover. Allow the
hydraulic fluid to cool.
3. Remove the front (7) and lower dash panels (9).
4. Through the front dash opening (11), disconnect and
label the drain hose (12) on the top of the steer
select valve (13). Cap the fitting on the top of the
valve and plug the drain hose.
5. Label the remaining hydraulic hoses on the steer
select valve.
WARNING:
Hydraulic oil leaking under
pressure can penetrate the skin and cause
severe personal injury. DO NOT use your hand
or any part of your body to check for hydraulic
leaks. When checking for hydraulic leaks, wear
safety glasses and gloves to help provide
protection from spraying hydraulic oil. Use a
piece of cardboard or paper to search for leaks.
MU3950
10
WARNING:
Hot hydraulic fluid can
cause severe burns. Wait for hydraulic fluid to
cool before servicing any hydraulic
component.
WARNING:
Escaping hydraulic fluid
under pressure can penetrate the skin, causing
death or serious injury. Relieve hydraulic
pressure before servicing any hydraulic
component.
MU4010
11
12
13