Hale MG - Manual (Page 47)

Muscle Pumps
3-4
Drive Line and Flange Bolts
Check all drive line and flange bolts to ensure:
1. No bolts are missing.
2. All bolts are tight.
3. Bolts used are “Grade 8” strength.
Pump Mounting Bolts
1. No bolts are missing.
2. All bolts are tight.
Priming System Test (Dry Vacuum Test)
IN THE FOLLOWING PRIMING SYSTEM TEST,
IF LEAKS CANNOT BE DETECTED BY
FOLLOWING THE PROCEDURE BELOW, IT IS
ADVISABLE TO TEST THE PUMP
HYDROSTATICALLY. TO DO THIS CONNECT
THE PUMP TO A SOURCE OF WATER, AND
LOOK FOR LEAKS.
1. Close all valves and drains. Cap all suction
openings and the outlet of the suction side relief
valve (if so 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 22 inches or more mercury vacuum.
4. Watch the gauge. If the vacuum falls more then
10 inches 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 a serviceable condition.
5. Test the suction hose as follows:
a. Attach the suction hose to the pump.
b. Place the 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 test 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 inches mercury.
f. Watch the gauge. If the vacuum falls more
then 10 inches 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 a
serviceable condition.
Relief Valve System Check
1. Place apparatus out of service in accordance
with departmental procedures.
2. Test relief valve system in accordance with
Weekly Maintenance Check. If the relief valve
is not working, clean the strainers as follows:
a. Open pump compartment panel and locate
the relief valve system strainer(s). (On all
relief valve systems the strainer is located
in one of the pump pressure taps. On TPM
an additional strainer is located in one of
the pump vacuum taps).
b. Disconnect tubing then remove strainer
from respective tap.
c. Clean any debris from strainer and check
strainer for damage.
d. Using a suitable thread sealant (Loctite
PST or equal) reinstall strainer.
e. Reconnect tubing.