Lull 944E-42 Service Manual Manuel d'utilisateur télécharger pdf (Page 766)

100

101

Stabil-TRAK™ System

10.8

Model 644E-42/944E-42 Rev. 6/04

10.3.2 Stabil-TRAK™ Solenoid Valves

There are five Stabil-TRAK™ solenoid valves (1, 2, 3,

4 and 5) installed in the Stabil-TRAK™ manifold, attached

to the stabilizer cylinder above the left side of the rear

axle.

If a solenoid valve is suspected of malfunctioning,

disconnect the coil wiring lead and test the coil for proper

resistance (7-9 ohms) and for proper voltage from the

harness (12 VDC). Replace the solenoid coil if open or

shorted to ground.

Also inspect the valve cartridge, o-rings, and the other

hydraulic and electrical components in the circuit to

accurately determine the cause of the problem.

All solenoid coils are identical and can be interchanged

for diagnostic purposes.

Note: DO NOT interchange valves 4A (2), 4B (3),

12A (4) or 12B (5) with valve 3 (1). These valves will fit

into the other locations, but are configured differently

internally and will not operate properly if interchanged.

Cartridge valves 4A (2), 4B (3), 12A (4) and 12B (5) are

identical and can be interchanged for diagnostic

proposes.

IMPORTANT: Make sure the .060 orifices are in place

when installing solenoid valves 4A (2) and 4B (3).

In general, if there is a problem with the Stabil-TRAK™

system beyond common electrical troubles, the involved

electrical and hydraulic circuits should each be checked

and the exact source of the problem diagnosed before

any parts are replaced.

10.3.3 Relay Testing

If after checking the electrical system, a relay is suspect,

test the relay as follows:

1. Park the vehicle on a firm, level surface. Level the

vehicle, ground the attachment, place the travel select

lever in the (N) NEUTRAL DETENT position, engage

the parking brake switch and shut the engine OFF.

2. Place an Accident Prevention Tag on both the

ignition key switch and steering wheel, stating that

the vehicle should not be operated. (Refer to Section

1.5, “Accident Prevention Tag Usage.”)

3. Refer to “Fuse Block Relay Locations” on page 9.22

for information on the location of the Stabil-TRAK™

system relays.

4. Refer to “Testing Relays from the Fuse Block” on

page 9.32 for instructions on testing the suspected

relay.

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Lull 944E-42 Service Manual Manuel d'utilisateur Page 766

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