1. Fire Research Pump Boss 400 Pressure Governor

2. Overview
To control pump operations the 2013 Rosenbauer Rear Mount Pumpers are equipped with a Pump Boss 400 pressure governor.
The Pump Boss 400 pressure governor operates in one of two modes; pressure or RPM.
It maintains a steady pump discharge pressure within system capabilities by controlling the engine speed or holds a selected engine RPM.

3. Features Automatic regulation of pump discharge pressure
Large Control Knob - Easy to operate with a gloved hand
Dual 600 PSI discharge and intake mounted pressure sensors
Programmable preset settings
Always starts in Pressure Mode at Idle RPM
Displays and LEDs automatically adjusted for day or night operation

4. Features Limits increase of pressure when in RPM Mode
Recognition of No Water Condition with automatic response
No pressure or RPM variation when changing modes
Red IDLE Button - Brings the engine to idle RPM quickly
Manual control of pressure or engine RPM settings
Retains warning alerts history
Audible alarm buzzer

5. Information Provided by Pump Boss
Engine RPM; shown with four daylight bright LED digits
Check Engine and Stop Engine warning LEDs
Engine oil pressure; shown on a dual color (green/red) LED bar graph display
Engine coolant temperature; shown on a dual color (green/red) LED bar graph display
Transmission temperature: shown on a dual color (green/red) LED bar graph display
Battery voltage; shown on a dual color (green/red) LED bar graph display
Pressure and RPM operating mode LEDs
Pressure/RPM setting; shown on a dot matrix message display
Throttle ready LED.
Pump Hour Meter (shown in LCD display)

6. Diagnostic and Warning Messages
High Battery Voltage
Low Battery Voltage (Engine off)
Low Battery Voltage (Engine running)
High Transmission Temperature
Low Engine Oil Pressure
High Engine Coolant Temperature
Out of Water (Visual alarm only)
No Engine Response (Visual alarm only).

7. How does it work?
In Pressure Mode, the governor maintains a constant pump discharge pressure. The discharge pressure is monitored and compared to the selected pressure setting, the engine RPM is varied to keep the discharge pressure at the selected setting.
In RPM mode the governor maintains a constant engine RPM. The pump discharge pressure is monitored, it can vary but is limited to an increase of 30 PSI. If the discharge pressure increases 30 PSI, the pressure governor automatically lowers the engine RPM to reduce the discharge pressure.

8. Henderson Fire Department Presets
The preset button on the Pump Boss has been preprogrammed by our department to 145 PSI to aid in quick setup for standard 200’ 1.75” hose speedlay deployment.

9. Give It a Try!
Click on link below to complete required FRC interactive tool.
Agree to Responsibility Code
Select PBA 400
Complete Chapters 1-8