JLG sky trak mmv Service Manual page 622

Electrical System
a. Parking Brake Switch Removal
1. Remove engine side battery box cover (1). Remove
wing nuts (2) and carriage bolts (3) and set cover
and mounting hardware aside for later re-assembly.
2. Disconnect the negative (-) battery cable (4) at the
battery negative (-) terminal on the battery in the
engine side battery box.
3. Disconnect the negative (-) cable (5) at the bottom of
the battery equalizer (6).
2
1
3
4. Carefully pry the parking brake switch (7) and wiring
out of the mounting hole.
5. Label and disconnect the wiring from the parking
brake switch. Remove the switch from the vehicle.
10.142
6
5
4
MM2911
7
MT09402
b. Parking Brake Switch Disassembly
DO NOT disassemble the parking brake switch. Replace
a defective or faulty switch with a new switch.
c. Parking Brake Switch Inspection and
Replacement
Inspect the switch terminals for continuity and shorting in
both the engaged and disengaged positions. Replace a
defective or faulty switch with a new switch.
d. Parking Brake Switch Installation and Testing
1. Route the wiring from the dash through the bezel,
then connect the wiring to the parking brake
switch (7) as labeled during switch removal.
2. Properly position the "P" on the switch (7), then
press or "snap" the switch into place in the bezel.
3. Connect the negative (-) battery cable (4) at the
battery negative (-) terminal on the battery in the
engine side battery box.
4. Connect the negative (-) battery equalizer cable (5)
at the bottom of the battery equalizer (6). Torque the
nut to a maximum of 100 lbs/in (11 Nm).
5. Replace engine side battery box cover (1). Use the
wing nuts (2) and carriage bolts (3) to secure the
cover in place.
6. Clear the area around the vehicle of personnel and
any obstructions to vehicle travel.
7. Start the engine, engage the park lock switch, place
the travel select lever in FORWARD [F] or
REVERSE [R] and second gear and apply full
throttle. The vehicle should remain motionless in
both FORWARD and REVERSE positions.
8. To test for proper parking brake switch
disengagement, firmly depress the service brake
pedal, disengage the park lock switch, place the
travel select lever in either forward or reverse and in
first gear, and slowly press the throttle pedal while
releasing the service brake pedal. The parking brake
should release and the vehicle should travel freely.
Note: The parking brake indicator on the operator's dis-
play panel must illuminate when the parking brake switch
is engaged, and not illuminate when the parking brake
switch is disengaged.
Model MMV Rev. 12-04