Table 2-1. Street Side Operator's Controls and Indicators
250 GPM Mini-Pumper Firefighting Truck (Continued)
(Refer to Figure 2-1)
Control or Indicator
Master Pressure Gauge.
The Master Pressure Gauge indicates the amount of pressure on the
discharge side of the pump. (0 to 600 PSI).
Compound Pressure Gauge.
The Compound Pressure Gauge indicates the amount of suction on the
suction side of the pump (0 to 600 PSI).
Relief Valve Control
The Relief Valve Control Flush
Knob is used to flush sediment from the relief valve.
Turn the knob left (counterclockwise) to flush. Turn the knob to the right
(clockwise) to close.
Change 1 2-5