Hale MBP Booster - Manual (Page 48)

47 Silencer Series Booster Pump, p/n: 029-0020-83-0
Preventive Maintenance
❑
2. Connect a test vacuum gauge or manom-
eter to the intake test gauge connection on
the pump panel.
3. Engage the priming pump until the gauge
indicates at least 22” Hg vacuum. (See
Figure 4-4: “PVG Priming Valve Handle.”)
4. Compare the readings of the test gauge
and the apparatus gauge. Note any differ-
ence.
5. STOP the priming pump and observe the gauge. If the vacuum falls more
than 10” Hg. in 5 minutes, it is an indication of at least one air leak.
6. Vacuum leaks can often be detected by ear if the apparatus engine is turned
OFF. Correct leaks immediately before returning the pump to service.
7. 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” Hg vacuum.
f. Watch the gauge. If the vacuum falls more than 10 inches in 5 minutes,
it indicates at least one air leak.
g. Verify the test gauge and the apparatus gauge display the same readings.
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 VALVES
❑ PLACE CAPS ON ALL VALVES
❑ CONNECT A POSITIVE PRESSURE SOURCE
❑ INSPECT THE PUMP FOR LEAKS
Figure 4-4: PVG Priming Valve
Handle