Hale MG - Manual (Page 63)

Muscle Pumps
4-5
CONDITION POSSIBLE CAUSE SUGGESTED CORRECTION
LEAK AT PUMP
PACKING Packing out of adjustment or
worn. Adjust the packing per the procedure in
Section 3 of this manual (8 to 10 drops per
minute leakage at 150 PSI (10 BAR)
preferred).
Replace pump packing per Section 3 of this
manual. Packing replacement is recommended
every 2 or 3 years depending on usage.
REMOTE CONTROL
DIFFICULT TO
OPERATE Lack of lubrication Lubricate the remote control linkages and
collar with oil.
ENGINE SPEEDS TOO
HIGH FOR
REQUIRED
CAPACTICTY OR
PRESSURE Truck transmission in wrong
range or gear
Lift too high, suction hose too
small
Defective suction hose
Blockage of suction hose entry
Worn pump impeller(s) and
clearance rings
Impeller blockage
Check recommended procedures for correct
transmission selection; see Section 3 and
truck manual.
Higher than normal lift (10 feet) will cause
higher engine speeds, high vacuum and rough
operation. Use larger suction hose.
Inner line of suction hose may collapse when
drafting and is usually undetectable. Try a
different suction hose on same pump; test for
comparison against original hose.
Clean suction hose strainer of obstruction and
follow recommended practices for laying
suction hose. Keep off the bottom of the water
supply but a least 2 feet below the surface of
the water.
Installation of new parts required.
Blockage in the impeller can prevent loss of
both capacity and pressure. Back flushing of
pumps from discharge to suction may free
blockage. Removal of one half of the pump
body may be required (this is considered a
major repair).
RELIEF VALVE DOES
NOT RELIEVE
PRESSURE WHEN
VALVES ARE
CLOSED Incorrect setting of Control
(Pilot) Valve
Relief Valve inoperative Check and repeat proper procedures for
setting relief valve system. (see Section 3)
Possibly in need of lubrication. Remove relief
valve from pump; dismantle; clean and
lubricate. Weekly use of the Relief Valve is
recommended.