C-6
C.3.1.8 Check Auxiliary Fire Suppression Equipment
Visually inspect all piping and valves on the pump and auxiliary equipment for corrosion or dam-
age.
C.3.2 Monthly Maintenance
Perform the following monthly.
• Perform a dry Vacuum Test (primer pump)
• Check the drive line bolts
C.3.2.1 Priming System Test (Dry Vacuum Test)
NOTE
Refer to NFPA 1901 or NFPA 1911.
Perform a dry Vacuum Test for the pump as follows.
A. Close all valves and drains. Cap all suction openings and (if equipped) outlet
of suction side relief valve.
B. On pump panel, connect a vacuum gauge (or manometer) to intake test
gauge connection.
DO NOT RUN THE PRIMER FOR MORE THAN 45 SECONDS IF PRIME IS NOT
ACHIEVED. IF PRIME IS NOT ACHIEVED IN 45 SECONDS, STOP AND LOOK FOR CAUS-
ES (AIR LEAKS OR BLOCKED SUCTION HOSE). RUNNING THE PRIMER FOR LONGER
PERIODS WITHOUT ACHIEVING PRIME MAY RESULT IN PRIMER AND/OR PUMP DAM-
AGE OR FAILURE.
C. Engage priming pump (see Figure 57) until gauge indicates at least 22 (± 2)
inHg vacuum.
Figure 58. Engage Priming Pump
D. Compare readings of test gauge and apparatus gauge. Record any difference.
E. Stop priming pump and observe gauge. If vacuum falls more than 10 inHg in
five minutes, at least one air leak is indicated.
NOTE
Vacuum leaks may often be detected by ear if the apparatus engine is turned off.
Correct leaks before returning the pump to service.
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