HALE AP, Technical Manual

Page: 30 / 177

18
The Vacuum Test (paragraph 3.2 on page 20) is intended as the initial check to determine if a
pump leaks. This test quickly and safely indicates if a leak exists however it typically ONLY indi-
cates a leak is present and usually does NOT locate the leak (or leaks). If a pump fails the Vacu-
um Test utilize the Pressure Test (paragraph 3.3 on page 22) to locate the leak (or leaks).
3.1.
Repair Verification Operations
Perform the following steps when a repair is completed to verify the pump is functional. This pro-
cedure is performed by pumping from a hydrant to ensure a clean, high quality water source and
to eliminate the risk of pump damage that could occur from an extended priming period which
could result from attempting to draft with an unverified pump.
NOTES
Refer to department procedures for setting wheel chocks and laying out suction and
discharge hoses.
All valves, drain cocks, and caps should be closed.
A. Prepare truck to pump.
Position truck for best hydrant hookup and discharge hose layout. 1.
Bring truck to a complete stop and come to an idle. (Never attempt to 2.
shift a moving truck from ROAD to PUMP.)
Apply truck parking brake. 3.
Shift truck transmission into NEUTRAL. 4.
Engage pump PTO switch. 5.
Shift road transmission into proper gear (usually DRIVE). 6.
Check the indicator lights to see if pump is in gear, check speedometer, 7.
and listen as pump goes in gear.
Momentarily press accelerator to ensure shift is complete. 8.
DO NOT LEAVE THE CAB OR ATTEMPT TO PUMP UNTIL ALL OK TO PUMP INDICATORS
IN THE CAB ARE ILLUMINATED. SEE FIGURE 7.
Figure 8. Driver Compartment Indicator Lights