Operation; Inspection And Maintenance - Komatsu 830E Shop Manual

The fire control system aids in protecting the machine
in the event of a fire. The system consists of:
• Actuators
• Pneumatic Actuator/Cartridge Receivers
• Pressure Relief Valve
• Check Valves
• Dry Chemical Tanks
• Hoses And Nozzles.
When either actuator is depressed, a nitrogen cartridge
will pressurize the dry chemical tank. Once the dry
chemical tank has pressurized to a sufficient pressure,
a bursting disc in the tank outlet will break, allowing the
FIGURE 2-1. FIRE CONTROL SYSTEM
1. Cab Actuator
2. Remote Actuator
3. Safety Relief Valve
4. Check Valves
M02004
FIRE CONTROL SYSTEM (MANUAL)
91461
5. Actuator Receiver
6. Cartridge
7. Bursting Disc Union
8. Dry Chemical Tank
Fire Control System
fluidized chemical to flow to the nozzles. The nozzles
will direct the agent at the fire and extinguish the flames.

Operation

To actuate the fire control system, pull the safety ring
on either of the actuators and depress the lever. One
actuator is located in the cab near the operator. An-
other actuator is located on the left fender structure
near the bumper.
NOTE: Operating either actuator will activate fire con-
trol system.

Inspection and Maintenance

It is imperative that the fire control system is inspected
at least every six months. To insure that it will operate
effectively:
1. Check the system for general appearance, me-
chanical damage and corrosion.
2. Inspect each chemical tank fill cap gasket for
damage and replace if necessary. Examine cap
for nicks, burrs, cross threading or rough edges.
3. Check the level of dry chemical. The level should
not be less than three inches (76 mm) from bottom
of fill opening. Dry chemical must be free flowing,
with no caking.
4. Insure that the vent in the fill opening threads is not
obstructed.
5. Remove the cartridge from the extinguisher and
examine the disc-seal. Replace seal if necessary.
Install cartridge hand tight.
FIGURE 2-2. NOZZLE AND BLOW-OFF CAP
91462
M2-1