Hale 2CBP - Manual (Page 16)

Sec II- 4 Operating Procedures
Booster Pumps
slightly open the drain line.
16. After completing pumping procedures,
gradually reduce the engine RPM to idle
speed and disengage the PTO.
PUMP AND ROLL OPERATION
Hale booster pumps are primarily driven by a
transmission mounted Power-Take-Off (PTO)
unit.
During pump and roll operation, it is necessary
to slow the forward motion of the apparatus to
the PTO manufacturer's recommended
engagement speed.
The following outlines a general pump and roll
procedure:
1. Slow the apparatus to safe PTO engagement
speed as recommended by the PTO manu-
facturer.
Note: Most PTOs must be engaged while the
apparatus is stopped. Only a "Hot Shift" PTO
can be engaged while the apparatus is rolling.
2. Engage the PTO.
3. Verify the PUMP ENGAGED light is illumi-
nated.
4. Open the valve between the tank and pump
suction.
5. Observe pump discharge pressure and verify
the pump pressure increases.
6. Prime the pump if necessary.
7. Open the discharge valves and commence
operations.
RELIEF VALVE PROCEDURES
TPM /P35 Relief Valve Procedures
These procedures cover the Hale TPM Relief
Valve System. Be sure to select the correct
procedure, for the equipment on the truck.
1. Set the pressure indicator on the PMD
control valve to a position slightly above the
normal operating pressure (even before
water starts to flow).
2. After normal operating pressure has been
achieved (as indicated on the master pres-
sure gauge while the pump is discharging
water), slowly move the adjusting hand
wheel counterclockwise until the relief valve
opens, and the amber indicator light comes
on.
3. Turn the hand wheel slowly clockwise until
the indicator light goes out. The relief valve
will operate at the set pressure.
4. When the pump is not in operation, turn the
hand wheel clockwise back to a position
slightly above the normal operating pressure.
Figure 2-3 PMD Relief
Valve Control