Hale Q Series Muscle User Manual
Page 59
59
MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Basic Operation
Some vehicles drive the speedometer from the front wheel of the chassis.
In this case, the speedometer will not register after shifting to the pump posi-
tion. See the chassis manual for details.
8.
Activate the priming pump - pull the control handle, or press the push button.
9.
Your departmental manual for pumping should specify the correct RPM for prim-
ing. However, in general, priming should be operated at IDLE.
10. Running the engine at speeds higher than 1,200 RPM during priming is not rec-
ommended. It does not improve the priming operation but can cause damage to
the pump.
CAUTION!
IF THE DISCHARGE GAUGE READING DOES NOT INCREASE, THE INTAKE GAUGE
READING DOES NOT FALL BELOW ZERO (0), OR THE PRIMING PUMP DOES NOT DIS-
CHARGE WATER TO THE GROUND WITHIN 30 TO 45 SECONDS, DO NOT CONTINUE TO
RUN THE PRIMING PUMP.
STOP THE PUMP AND CHECK FOR AIR LEAKS OR POSSIBLE PROBLEMS. SEE SEC-
TION 6 “TROUBLESHOOTING,” ON PAGE 93.
11. Monitor the intake and discharge master gauges. When the pump is primed, the
intake reading falls below zero (0), and the discharge pressure starts to increase.
You may also hear water splashing on the ground, indicating the pump is primed.
12. Gradually open the discharge valve until water emerges in a steady stream. Then
open the other discharge valves to the desired setting.
13. Gradually open the engine throttle until the desired pressure or flow is achieved.
CAUTION!
DO NOT CAUSE A WHIRLPOOL AT THE STRAINER. THIS ALLOWS AIR INTO THE PUMP,
CAUSING ROUGH OPERATION AND PULSATION. REPOSITION THE STRAINER OR
REDUCE FLOW.
14. As the throttle is opened, the pressure gauge reading increases with the engine
speed. If the engine speed increases without an increase in pressure, the pump
may be cavitating.
15. If the pump is cavitating, warn personnel that the flow is being REDUCED. Close
the throttle slowly until you operate without cavitation.
The following can also lead to cavitation:
Large nozzle tips - Use a smaller nozzle to reduce flow.