Hale 2CBP - Manual (Page 32)

Sec IV- 4
Troubleshooting
Clean suction hose strainer of
obstruction and follow
recommended practices for
laying suction hose. Blockage of suction hose entry
CONDITION POSSIBLE CAUSE SUGGESTED CORRECTION
Relief Valve improperly set If the relief valve control is set
too low the relief valve will
open and bypass water. Reset
the relief valve control per the
procedures in Section III. Other
bypass lines (such as foam
system or in-line valves) may
reduce pump capacity or
pressure. INSUFFICIENT PUMP
CAPACITY (cont'd.)
ENGINE SPEEDS TOO HIGH
FOR REQUIRED CAPACITY
OR PRESSURE Truck transmission in wrong
range or gear Verify the transmission is in the
correct gear.
Lift too high, suction hose too
small Higher than normal lift (10 feet)
will cause higher engine
speeds, high vacuum and
rough operation. Use larger
suction hose. Bring the pump
closer to the water source.
Inner line of suction hose may
collapse when drafting and is
usually undetectable. Change
the suction hose on the pump;
test for comparison against
original hose. Defective suction hose
Pump is approaching
cavitation. Gate the discharge valves to
allow pressure to increase.
This will reduce flow.
Reduce the throttle opening
to the original pressure
setting.