HALE AP, Operation And Maintenance Manual

Page: 23 / 70

Preventive Maintenance
Booster Pumps
Sec III- 3
Monthly Maintenance
o
Check the Gearbox Oil
o
Perform the dry vacuum test
o
Check the drive line bolts.
Gearbox Lubrication
Too much oil or the wrong type of oil will result
in unnecessary loss of power and high oil
temperature. Change the oil every 12 months,
depending on pump usage. Recommended oil
for Hale booster pumps is SAE EP-90, 80W-90,
or synthetic 75W-80 gear oil
that meets service rating of API
GL-5 requirements. Gearbox
capacity is one to two quarts.
1. Remove the gearbox oil fill
plug, and check the level of
the oil in the gearbox. The
level should be up to the
plug hole. Figure 3-2
2. If the oil appears white or "milky," a water
leak is indicated. Remove the drain plug
(figure 3-3) and drain the oil into a suitable
container. Examine the oil for metal flakes or
other contamination. Either of these condi-
tions indicate maintenance is required on the
unit.
Priming System Test (Dry Vacuum Test)
(Refer to NFPA 1901 or NFPA 1911)
1. Close all valves and drains. Cap all suction
openings and the outlet of the suction side
relief valve (if equipped).
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 at least 22 IN-ng
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 than 10 in of
Hg in 5 minutes, it is a certain indication of at
least one air leak. Vacuum leaks may often
be detected by ear 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 suc-
tion side relief valve (if so equipped).
d. Connect a calibrated vacuum gauge or
manometer to the intake test gauge connec-
tion on the pump panel.
e. Engage the priming pump until the gauge
indicates at least 22 IN-ng vacuum.
f. Watch the gauge. If the vacuum falls
more than 10 inches in 5 minutes, it is a
certain indication of 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.
IF LEAKS CANNOT BE DETECTED BY
FOLLOWING THE PROCEDURE , IT IS
ADVISABLE TO TEST THE PUMP
HYDROSTATICALLY.
o
Open all the valves.
Figure 3-2
Figure 3-3