Service Manual User Manual

Section 10
10-60
Model 3606 • Origin 10/99
a. Hydraulic Oil Temperature Switch Removal
1. Disconnect the negative (-) battery cable at the
negative battery terminal (Fig. 10– 62).
2. Label and disconnect the switch wiring connector
from the hydraulic oil filter pressure switch lead.
3. Unthread the switch from the hydraulic reservoir.
b. Hydraulic Oil Temperature Switch Disassembly
DO NOT disassemble the hydraulic oil temperature
switch. Replace a defective or faulty switch with a new
one.
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 one.
e. Installation and Testing
1. Thread the switch (Fig. 10– 60) into its welded fitting
on the hydraulic reservoir. Tighten securely.
2. Connect the switch wiring connector lead for the
hydraulic oil pressure switch.
3. Connect the negative (-) battery cable to its battery
terminal (Fig. 10– 62).
4. Clear the area around the vehicle of personnel and
any obstructions to vehicle travel.
5. 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 operators display panel.
10.8.8 Parking Brake Switch
The parking brake switch (Fig. 10– 63) 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 is a two-position toggle switch; the two posi-
tions are engaged and disengaged (Fig. 10– 64). The
parking brake switch must be ENGAGED to permit
engine starting. The parking brake may be used to stop
in an EMERGENCY situation; however, notify the opera-
tor to use caution as the stop will be abrupt and the oper-
ator and the load may be jolted forward unexpectedly.
Figure 10– 63. Location of various operational controls.
When engaged, the parking brake switch completes the
parking brake circuit. The park brake solenoids on the
auxiliary function valve (Fig. 10– 62) are normally de-
energized, allowing the park brake to engage. When the
park brake solenoids are energized, the park brake is dis-
engaged. The system is designed so that, when electri-
cal power is OFF the park brake is engaged.
Figure 10– 64. The parking brake switch has two positions,
engaged and disengaged.
OS0402
Parking Brake
Switch
P
P
OS0120
To engage, toggle downward
To disengage, toggle upward
OS1322