Hale MG - Manual (Page 41)

Muscle Pumps
2-7
Pump To Road Shift Procedures
1. Verify that the operator’s hand throttle or
governor control has returned to idle speed.
2. Shift the truck transmission into the
NEUTRAL position, and wait four seconds.
Check to make sure the speedometer reads 0.
3. Moving pump shift control valve lever to the
ROAD position. The in-cab and panel pump
indicator lights should go out when the pump
transmission starts to shift into the ROAD
position.
REFER TO THE FIRE DEPARTMENT
PROCEDURES ON REMOVING WHEEL CHOCKS
AS WELL AS LAY OUT AND CONNECTION OF
SUCTION AND DISCHARGE HOSES.
Standard Relief Valve Procedures
These procedures are for setting the operating
point of the standard relief valve.
1. Increase the engine RPM to reach the desired
pump operating pressure while reading the
discharge pressure gauge.
2. Turn the hand wheel slowly counterclockwise
until the relief valve opens, the pilot light
comes on, and the master pressure gauge drops
a couple of PSI (BAR).
3. Turn the hand wheel slowly clockwise until the
master pressure gauge rises to the desired
pressure and pilot light goes out. The relief
valve will now operate at the set pressure.
4. When the pump is not in operation, turn the
hand wheel clockwise so that the control is set
slightly above the normal operating pressure.
When the pump is put into operation again,
reset the control valve to the desired operating
pressure.
TPM Relief Valve Procedures
These procedures cover the Hale TPM Relief
Valve System. Be sure to select the correct
procedure, according to relief valve.
TPM System (only)
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 pressure
gauge and with the pump discharging water),
slowly move the adjusting handwheel
counterclockwise until the relief valve opens,
the amber pilot light comes on, and the master
pressure gauge reading drops a couple of PSI
(BAR).
3. Turn the handwheel slowly clockwise until the
master pressure gauge reading is at the correct
operating pressure and the pilot light goes out.
The relief valve will operate at the set pressure.
THE INDICATOR ON THE PANEL IS ONLY
A ROUGH INDICATION OF TPM SETTING.
ALWAYS USE THE ABOVE PROCEDURE
TO PROPERLY SET THE TPM RELIEF
VALVE SYSTEM.
TPM System with Engine Governor
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. Power on the governor control.
3. Set the discharge pressure using the RPM
mode of the pressure governor control.
4. Move the TPM handwheel counterclockwise
until the relief valve opens and the amber pilot
light comes on.