SkyTrak 6036 Service Manual - Manual (Page 212)

Electrical System
9-24 6036, 6042, 8042, 10042, 10054
9.10.5 Service Brake Switch
The service brake switch (12) works in conjunction with
the Stabil-TRAK system. With the boom above 40°, the
transmission shifter in either forward or reverse, and the
service brake depressed, the Stabil-TRAK system
engages. If the Service Brake Switch is suspect in the
proper operation of the Stabil-TRAK system, refer to
Section 10.7, “Stabil-TRAK™
System Test.”.
a. Service Brake Switch Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the rear door. Allow the system fluids to cool.
4. Properly disconnect the battery.
5. Label and disconnect the electrical connectors
attached to the service brake switch.
6. Loosen locknut and remove switch dust cover (13).
Remove switch body.
b. Service Brake Switch Installation
1. Ensure that there is only one thread showing above
the locknut on the shaft of the switch body.
2. Insert switch body through the top of the service
brake switch bracket.
3. Thread the switch dust cover onto the switch body
until finger tight against the service brake switch
bracket.
4. Use a wrench and fully tighten the locknut against
the service brake switch bracket. There should now
be approximately two or three threads showing
above the locknut.
5. Thread the bottom lip of the switch plunger through
the hole in the bottom of the dust cover.
6. Connect the cab harness electrical connectors to the
service brake switch connectors.
7. Properly connect the battery.
8. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
9. Adjust the brake switch. Refer to Section 9.10.5, c.
“Service Brake Switch Adjustment.”
c. Service 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.
2. Loosen locknut securing the switch body to the
service brake switch bracket.
3. Connect a 1000 psi (69 bar) pressure gauge to the
test port on the service brake valve.
4. Block both front tires.
5. Start the engine and run at low idle.
6. Position the boom above 40°, release the park brake
and place the transmission control lever in forward
4th gear.
7. Slowly depress and hold the brake pedal to maintain
150 ±50 psi (10,3 ±3,4 bar) brake pressure.
MH6210
12
13
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.