Miscellaneous Component Test And Adjustment; Brake System Interlocks Check - Komatsu 830E Shop Manual

8.0 MISCELLANEOUS COMPONENT TEST AND ADJUSTMENT

8.1 Brake System Interlocks Check

NOTE: On brake and steering checks, the engine is to be started and run until proper hydraulic
and air pressures are achieved and all instrument panel warning lights are turned Off.
Preparation
•
After normal pressures are reached, the engine is then shut down and the key switch is left in
the RUN (On) position.
•
On 830E trucks the key switch must first be turned Off to shut down the engine, and then
returned to the RUN (On) position to maintain hydraulic pressures.
1. With air tanks fully charged to 120 PSI or more for trucks with air brakes, or hydraulic pressure
at normal operating pressure or more for trucks with hydraulic brakes, and all brakes released,
place selector switch in FORWARD and depress the throttle pedal.
The propulsion contactors should energize.
It should be possible to remove jumper between 73R and 73P (if installed) and still get
the propulsion contactors to energize.
2. With brake lock switch On, depress the throttle pedal.
Propulsion contactors should not energize.
3. Turn brake lock switch Off, turn emergency brake switch On and depress the throttle pedal.
Propulsion contactors should not energize. (Some trucks do not have emergency brake
switch.)
4. Turn emergency brake switch Off, turn operational parking brake switch On and depress the
throttle pedal.
Propulsion contactors should not energize. Park brake light on instrument panel should
come On.
5. Turn park brake switch Off.
6. With selector switch in REVERSE, depress the throttle pedal.
Propulsion contactors should energize.
7. Depress the service brake pedal.
Propulsion contactors should drop out.
Service brake light on instrument panel should come On.
8. Operate override switch on instrument panel or on selector switch console.
Propulsion contactors should pull in and stay pulled in as long as override switch is held
manually.
E3-42
Block truck wheels securely to prevent rolling when the
brakes are released.
The hydraulic pressures will bleed off if the key switch is
not left in the RUN (On) position.
Statex III Electrical Checkout Procedure 2/02 E03012