Hale SMR - Manual (Page 59)

Stainless Max Series Pumps 4-7
Preventive Maintenance
4. Compare the readings of the test gauge and the apparatus
gauge. Note any difference.
5. Stop the priming pump and observe the gauge.
If the vacuum falls more than 10 inches of Hg in 5 minutes, it is
an indication of at least one air leak.
Vacuum leaks may often be detected audibly if the apparatus
engine is turned off. Correct leaks immediately to return the
pump to service.
6. Test the suction hose as follows:
a. Attach the suction hose to the pump.
b. Place a suction tube cap on the end of the hose in place of a
strainer.
c. Close all valves and drains. Cap all suction openings and the
outlet of the suction side relief valve (if so equipped).
d. Connect a calibrated vacuum gauge or manometer to the
intake test gauge connection on the pump panel.
e. Engage the priming pump until the gauge indicates at least
22 IN-hg vacuum.
f. Watch the gauge. If the vacuum falls more than 10 inches in 5
minutes, it is an indication of at least one air leak.
g. Verify that the test gauge and the apparatus gauge display the
same readings.
h. Repair or replace any gauges that do not display the correct
pressure.
IMPORTANT!
IF LEAKS CANNOT BE DETECTED BY FOLLOWING THE PROCEDURE, IT
IS ADVISABLE TO TEST THE PUMP HYDROSTATICALLY. TO TEST:
❑ OPEN ALL THE VALVES
❑ PLACE CAPS ON ALL VALVES
❑ CONNECT A POSITIVE PRESSURE SOURCE
❑ INSPECT THE PUMP FOR LEAKS
Drive Line and Flange Bolts
Check all drive line and flange bolts to ensure:
1. No bolts are missing.