HALE AP, Technical Manual

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20
If pump overheats, perform appropriate following step. 6.
a) If pump is NOT equipped with a Hale TRV valve, open appropriate valve(s) (usually
tank fill or gutter line) to provide a 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.
D. Begin shutdown.
Gradually reduce throttle and pump pressure until engine is at idle speed. 1.
Close discharge(s). 2.
Ensure tank is full of water. 3.
If opened, close bypass line valve(s) or TRV. 4.
Close suction valve. 5.
Place transmission in NEUTRAL. 6.
Disengage PTO. 7.
Close hydrant. 8.
E. Disconnect all hose connections and stow hoses.
F. Make all appropriate Maintenance Log entries.
G. Perform Pumping From Draft Verification Operations procedure (see para-
graph 3.4 on page 23).
3.2. Vacuum Test
Refer to Table 1 for a list of tools and/or consumables required for this procedure.
Table 1. Vacuum Test Tools And Consumables List
Standard Tools Special Tools Consumables
PPE
(Eye, Hand, and Ear Pro-
tection)
30 inHg Vacuum Gauge (or Manometer)
(Use ONLY a High Quality Calibrated Gauge/
Manometer)
Shop Rag(s) (As Required)
Blanking Cap(s) (As Required)
Tachometer
This test is intended to ONLY test the booster pump for leaks. A known good vacuum pump is
preferred for this test. However, if the apparatus has a primer pump, that primer can be used for
this test to verify both are leak free and the primer does NOT exhibit excessive wear or damage.
If the apparatus associated primer does NOT reach a vacuum of 22 (± 2) inHg (0.745 bar) but
holds a lower vacuum, a fault in the primer is indicated. Perform the following steps to Vacuum
Test a pump.
A. Place blanking cap(s) on pump inlet(s).
B. If no apparatus primer is present, connect a known good primer or vacuum
pump (along with a vacuum/compound gauge) to highest discharge port.
C. Close discharge valve(s) or place blanking cap(s) on pump outlet(s).