HALE AP, Technical Manual

Page: 36 / 177

24
B. Prime pump.
RUNNING THE ENGINE AT SPEEDS HIGHER THAN 1200 RPM DURING PRIMING IS
NOT RECOMMENDED SINCE IT WILL NOT IMPROVE PRIMING OPERATION AND MAY
CAUSE DAMAGE TO THE PUMP.
IF IN 30 TO 45 SECONDS ONE OF THE FOLLOWING (BULLETS) DOES NOT OCCUR
STOP THE PUMP AND CHECK FOR AIR LEAKS OR A POSSIBLE PUMP TROUBLE.
•
THE DISCHARGE GAUGE READING INCREASES
•
THE INTAKE GAUGE READING FALLS BELOW ZERO
•
THE PRIMING PUMP DISCHARGES WATER TO THE GROUND
CONTINUING TO RUN THE PRIMING PUMP MAY RESULT IN PUMP FAILURE OR DAM-
AGE.
Immerse intake strainer at least two feet below water surface to prevent 1.
pump from drawing air. (If whirlpools form above intake strainer the
strainer is too close to the surface of the water.)
Make sure intake strainer is far enough from the bottom to prevent sand, 2.
gravel and other foreign matter from being drawn into the pump.
NOTE
The pump is primed when the intake indication reading falls below zero, and the dis-
charge pressure starts to increase. Water may also be heard discharging to the
ground.
If apparatus is equipped with a priming pump, activate priming pump. 3.
(Pull control handle located on pump panel.) Otherwise, slowly open ap-
propriate discharge(s) and advance engine throttle gradually until master
discharge gauge indicates desired pressure.
Monitor intake and discharge master gauges. 4.
NOTE
As the throttle is opened, increase the pressure gauge reading with engine speed. If
the engine speed increases without an increase in pressure, the pump is nearing
cavitation.
C. Verify pump performance.
Set automatic control/relief valve per department policy. If no depart- 1.
ment policy exists, refer to paragraph 3.6, Relief Valve Procedures, on
page 30.
If pump overheats, perform appropriate following step. 2.
a) If pump is NOT equipped with a Hale TRV valve, open appropriate valve(s) (usually
tank fill or gutter line) to provide bypass line.
b) If pump is furnished with a Hale TRV valve, open valve to booster tank (both suc-
tion and discharge sides) to circulate water (and/or fill water tank).
c) Verify pump is operating correctly by checking ALL gauge readings.