Relief valve procedures, Tpm /p35 relief valve procedures, Figure 3-4: pmd relief valve control – Hale SMR User Manual
Page 46
Operating Procedures
3-12
Stainless Max Series Pumps
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 ON.
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 based upon how the truck is
equipped.
See Figure 3-4: “PMD Relief Valve Control.”
1. Set the pressure indicator on the PMD control valve to a position
slightly above the normal operat-
ing pressure (even before water
starts to flow).
2. After normal operating pressure
has been achieved (as indicated
on the master pressure gauge
while the pump is discharging
water), slowly move the adjusting
hand wheel counterclockwise
until the relief valve opens.
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.
Figure 3-4: PMD Relief Valve
Control
Indicator Light
(Amber)
Pressure Indicator