Hale Q Series Muscle - Manual (Page 57)

57 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Basic Operation 
12. If you need to increase pressure when this occurs, pump flow must be reduced or
the water supply improved.
To increase pressure, reduce the pump flow. However, the master intake gauge
reading must be maintained at 5 PSI (34 kPa), minimum.
13. As the throttle (engine speed) is increased, the pressure gauge reading
increases.
14. Close the throttle slowly until the pressure begins to stabilize and track with
engine speed. If this does not correct the problem, you may be pumping more
capacity than is available from the supply. Also check the inlet strainers for possi-
ble blockage.
15. Open the discharge valves.
IMPORTANT!
IF THE PUMP OVERHEATS AND IS NOT EQUIPPED WITH THE HALE TRV, OPEN THE
VALVE TO ACCESS THE PUMP AUXILIARY COOLING SYSTEM, OR SLIGHTLY OPEN
THE TANK FILL LINE TO CIRCULATE WATER.
16. When pumping operations are completed, gradually reduce the pump pressure
until the engine returns to IDLE speed. See heading “Pumping From Draft” on
page 58. Disengage the PTO per the PTO manufacturer’s instructions. Also see
heading “Pump-To-Road Shift Procedures” on page 65.
TPM Operation from a Hydrant
When operating from a positive inlet pressure, it may be necessary to adjust the TPM
relief valve to a point where water is dumping to the ground.
The internal relief valve is always opened first, and if it cannot handle the pressure
rise, the external relief valve dumps water on the ground. When the internal relief
valve opens, the panel light illuminates, and when the external dump valve opens, the
light on the panel FLASHES.
Draft Limiting Factors
The effect of raised water temperatures when pumping from a positive pressure
source (i.e., a hydrant) is negligible on fire pump performance. However, when pump-
ing from draft (static source such as a pond, lake or basin), elevated water tempera-
ture does have a limiting effect.
Water temperatures above 95°F (35°C) cause a noticeable decrease in lift when draft-
ing. Also see Table G-2: “Lift Loss from Temperature” on page 195.