Hale Q Series Muscle - Manual (Page 66)

 Basic Operation
66 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
6. Prime the pump, if necessary.
7. Open the discharge valves and commence operations.
4.8 RELIEF VALVE PROCEDURES
Be sure to select the correct procedure based on how the truck is equipped. (See Fig-
ure 4-3: “TPM / PMD Relief Valve Control” on page 67.) Some trucks may utilize a
governor in place of the relief valve.
Standard Relief Valve Procedures
1. Increase the engine RPM to the desired pump operating pressure while reading
the discharge pressure gauge.
2. Turn the handwheel slowly counterclockwise until the relief valve opens. The pilot
light illuminates and the master pressure gauge drops a few PSI (kPa).
3. Turn the handwheel slowly clockwise until the master pressure gauge rises to the
desired pressure and the pilot light goes out.
4. When the pump is not in operation, turn the handwheel clockwise to a position
slightly above the normal operating pressure. When the pump is put into opera-
tion again, reset the valve to the desired operating pressure. More complete and
detailed information is found in the relief valve manual.
TPM Relief Valve Procedures
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. When normal operating pressure is achieved (as indicated on the master pres-
sure gauge while the pump is discharging water), slowly move the adjusting
handwheel counterclockwise until the relief valve opens.