beautypg.com

Pump and roll operation, Relief valve procedures – Hale 2CBP User Manual

Page 16

background image

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

This manual is related to the following products: