Hale RSD - Manual (Page 51)

51 RSD Series Single-Stage PTO Pumps
p/n: 029-0020-92-0
Pr ev en tive M ain te n an ce
❑
2. Connect a test vacuum gauge or manometer to the
intake test gauge connection on the pump panel.
3. Engage the priming pump until the gauge indicates
22” Hg. vacuum.
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 then 10” Hg. in five (5) min-
utes, it is an indication of at least one air leak.
6. Vacuum leaks may 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:
❑ Attach the suction hose to the pump.
❑ Place the suction tube cap on the end of the hose in place of a strainer.
❑ Close all valves and drains. Cap all suction openings and the outlet of the
suction side relief valve (if so equipped).
❑ Connect a test vacuum gauge or manometer to the intake test gauge con-
nection on the pump panel.
❑ Engage the priming pump until the gauge indicates at least 22” Hg.
❑ Watch the gauge. If the vacuum falls more then 10” in five (5) minutes it is
a certain indication of at least one air leak.
❑ Verify the test gauge and the apparatus gauge display the same readings.
Repair and/or replace 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 (TYPICALLY 250 PSI / 17 BAR)
❑ INSPECT THE PUMP FOR LEAKS
Figure 4-2: Priming
Valve Handle