Hale 2CBP - Manual (Page 33)

Troubleshooting
Sec IV- 5
RELIEF VALVE DOES NOT
RELIEVE PRESSURE WHEN
VALVES ARE CLOSED Incorrect setting of Control
(PMD) Valve Check and repeat proper
procedures for setting relief
valve system. (See Section 3)
Relief Valve inoperative Refer to the relief valve
manual.
RELIEF VALVE DOES NOT
RECOVER AND RETURN TO
ORIGINAL PRESSURE
SETTING AFTER OPENING
VALVES
Dirt in system causing
sticky or slow reaction Refer to the relief valve
manual.
Clean the valve with a small
wire or straightened paper clip.
Refer to the relief valve
manual.
CONDITION POSSIBLE CAUSE SUGGESTED CORRECTION
Worn pump impeller(s) and / or
clearance rings Installation of new parts
required.
Impeller blockage Blockage in the impeller can
prevent loss of both capacity
and pressure. Back flushing
the pump from discharge to
suction may free blockage.
Removal of the pump head
may be required (this is
considered a major repair).
Blocked relief valve.
WATER IN PUMP GEARBOX Leak coming from above pump Check all piping connections
and tank overflow for possible
spillage falling directly on to
the pump gearbox.
If mechanical seal is installed,
there should be no leaks.
Inspect the oil seal and
replace if necessary. Leaking Mechanical Seal