Lull 944E-42 Service Manual - Manual (Page 193)

9-35 944E-42
Electrical System
5. Install the dust cover (11).
6. Connect the cab harness electrical connectors to the
service brake switch connectors.
7. Properly connect the batteries.
8. Adjust the brake switch. Refer to Section c,
“Stabilizer Brake Switch Adjustment.”
When Service Brake Valve Mounting Plate Has
Threaded Mounting Hole
1. Thread the locknut (12) onto the shaft of the switch.
Leave enough threads at the bottom of the shaft for
the thickness of the plate plus approximately 5
threads to extend beyond the plate when mounted.
2. Thread the switch (13) through the top of the service
brake valve mounting plate. There should be
approximately 5 threads on the switch shaft beyond
the mounting plate.
3. Use a wrench and fully tighten the locknut against
the service brake valve mounting plate.
4. Install the dust cover (14).
5. Connect the cab harness electrical connectors to the
service brake switch connectors.
6. Properly connect the batteries.
7. Adjust the brake switch. Refer to Section c,
“Stabilizer Brake Switch Adjustment.”
c. Stabilizer Brake Switch Adjustment
Note: The service brake switch adjustment will require
two people. Enlist the help of an assistant before
attempting to follow the adjustment procedure.
1. Remove the lower access panel (15).
2. Connect a 1000 psi (69 bar) pressure gauge to the
test port (16) on the service brake valve (17).
3. Block both front tires.
4. Start the engine and run at low idle.
5. Ensure that the boom is below 40°, and the park
brake switch is ON.
6. Ensure that the Stabil-Trak “Slow Pivot” Mode
indicator is OFF.
7. Slowly depress and hold the brake pedal to maintain
150 ±50 psi (10,3 ±3,4 bar) brake pressure.
8. Adjust the stabilizer brake switch.
When Service Brake Valve Mounting Plate Does Not
Have Threaded Mounting Hole
Using the top and bottom locknuts in combination,
position the brake switch so the Stabil-Trak “Slow Pivot”
Mode indicator comes ON at the 150 ±50 psi (10,3±3,4
bar) brake pressure.
When Service Brake Valve Mounting Plate Has
MU6990
12
13
14
WARNING
NEVER attempt to adjust the service brake switch
without an assistant. Anytime the engine is running
and the parking brake is disengaged, there must be
an operator located in the cab and the two front tires
must be blocked.
MU7000
15
16
17