Parking Brake Switch - JLG sky trak mmv Service Manual

b. Hydraulic Oil Temperature Switch Disassembly
DO NOT disassemble the hydraulic oil temperature
switch. Replace a defective or faulty switch with a new
switch.
c. Hydraulic Oil Temperature Switch Cleaning and
Drying
DO NOT submerge the hydraulic oil temperature switch.
Clean only with an approved solvent and dry with a clean,
lint-free cloth.
d. Hydraulic Oil Temperature Switch Inspection and
Replacement
Inspect switch wiring for continuity and shorting. Replace
a defective or faulty switch with a new switch.
e. Installation and Testing
1. Thread the switch (1) into its welded fitting (2) on the
hydraulic reservoir. Tighten securely.
2. Connect the switch wiring connector lead (3) to the
harness connector (4).
3. Connect the negative (-) battery cable (10) at the
battery negative (-) terminal on the battery in the
engine side battery box.
4. Connect the negative (-) battery equalizer cable (11)
at the bottom of the battery equalizer (12). Torque
the nut to a maximum of 100 lbs/in (11 Nm).
5. Replace engine side battery box cover (7). Use the
wing nuts (8) and carriage bolts (9) 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, check for hydraulic fluid leaking at
the hydraulic oil temperature switch, and allow the
hydraulic fluid to reach operating temperature. Cycle
the boom several times and check whether the
hydraulic oil temperature warning indicator
illuminates on the operator's display panel.
Model MMV Rev. 12/04
10.13.5

Parking Brake Switch

The parking brake switch (17) is located on the dash to
the left of the steering column and is pressed or
"snapped" into a rectangular switch bezel. The parking
brake switch must be ENGAGED to permit engine start-
ing.
Note: The parking brake may be used to stop in an
EMERGENCY situation; however, notify the operator to
use caution as the stop will be abrupt and the operator
and the load may be jolted forward unexpectedly.
The parking brake switch is a two-position toggle switch;
the two positions are engaged (18) and disengaged (19).
The switch is marked with an engaged (20) and disen-
gaged (21) symbol. When engaged, the parking brake
switch completes the parking brake circuit. The parking
brake solenoids on the auxiliary function valve (5) are nor-
mally de-energized, allowing the parking brake to engage.
When the parking brake solenoids are energized, the
parking brake is disengaged. The system is designed so
that, when electrical power is OFF the parking brake is en-
gaged. (Refer to Section 10.13.5, Parking Brake Switch .)
18
19
OS1323
Electrical System
17
20
P
P
21
OS0121
MT09402
10.141