Lull 944E-42 Service Manual - Manual (Page 785)

10.27 Model 644E-42/944E-42 Rev. 6/04
Stabil-TRAK™ System
Stabil-TRAK System Test Procedures
Step 1
a. Place the vehicle on a level surface with 0° sway.
b. Have the boom fully retracted and horizontal.
c. Place an 8" (203 mm) wood or cement block in front of the front left tire.
d. Enter the vehicle.
e. Fasten the seat belt.
f. Turn the ignition switch to the RUN position.
g. Check to be sure the Stabil-TRAK™ lock light and the slow pivot light are both OFF.
Step 2
a. Turn the ignition switch and start the engine.
b. Turn the parking brake switch OFF.
c. Move the range select lever to (1) FIRST gear.
d. Move the travel select lever to the (F) FORWARD position.
e. Drive the vehicle up on the block and stop the vehicle.
f. Use the frame sway control to level the vehicle back to 0°.
Step 3
a. Depress the service brake pedal.
b. Move the travel select lever to the (N) NEUTRAL DETENT position.
c. Raise the boom to exactly 60°. The Stabil-TRAK™ lock light should come ON when the boom angle is
at about 40° and remain ON. The Stabil-TRAK™ slow pivot light should be OFF.
Step 4
a. Use your left foot to depress the service brake pedal.
b. Move the travel select lever to the (R) REVERSE position and the range selector to the
(2) SECOND gear position.
c. Ease your left foot partially off the service brake pedal, just keeping the Stabil-TRAK™ lock light ON
Approximately 3/4 pedal travel which will be 150 psi (10,3 bar) pressure in the brake valve.
d. With your right foot, increase the engine rpm slightly, as necessary, to back the vehicle off the block.
The Stabil-TRAK™ lock light should remain ON while backing off the block, the front left tire should
remain off the ground. If the front left tire drops to the ground, repeat steps 1 thru 4.
IMPORTANT: Perform Steps 5 thru 9 with the engine rpm at idle.
Step 5
a. Keep the service brake pedal depressed.
b. Move the travel select lever to the (N) NEUTRAL DETENT position.
c. Take your foot off the service brake pedal. The Stabil-TRAK™ lock light should remain ON and the
front left tire should remain off the ground.
Step 6
a. With the travel select lever in the (N) NEUTRAL DETENT position, engage the parking brake switch.
b. Move the travel select lever to the (F) FORWARD position. DO NOT depress the service brake
pedal. The Stabil-TRAK™ lock light should remain ON and the front left tire should remain off the
ground.
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