require a few minutes to evacuate air from the suction line.
After several minutes of operation, pump will be fully primed
and pumping water. Priming time will vary depending on
length and diameter of suction line.
RUNNING THE ENGINE
Refer to engine owner/operator manual supplied with pump
for starting and operating instructions.
Pump performance varies depending on engine R.P.M.
Refer to engine operator's manual to adjust engine speed.
MAINTENANCE
PUMP LUBRICATION
Pump liquid end does not require any grease or oil for lubri-
cation. The mechanical seal is lubricated by water when the
pump is operating.
ENGINE
Refer to the engine manufacturer's operating manual for
complete maintenance.
3
WARNING
Rotating parts. Can catch
hands, feet, or clothing.
Stay clear of equipment
and keep shields in place
while pump is running.
Stop motor or engine
before servicing pump.
Read owner’s manual
before using equipment.
CAUSE
CORRECTIVE ACTION
1. ENGINE
A. Speed too low
Refer to engine manufacturer’s manual
B. Rotating and/or reciprocating parts drag
Refer to engine manufacturer’s manual
C. Speed too high
Maximum engine speed not to exceed engine manufacturer’s recommendation.
D. Loose or broken parts
Refer to engine manufacturer’s manual
2. PUMP
E. Not primed
Reprime, inspect suction system for air leaks, and or clack assembly.
F. Pump takes too long to prime
Check for air leaks or defective check valve.
G. Flow through pump completely
Locate and remove obstruction. Attach strainer.
or partially blocked
H. Internal leakage
Check clearances between face of vanes and case. Should not exceed 1/32".
I. Rotating parts drag
Inspect. Repair.
J. Loose or broken parts
Inspect. Repair.
3. SYSTEM
K. Pressure required by system at design
Compare pump pressure and flow rate against pump performance chart.
flow rate exceeds pressure rating of pump
Reduce system pressure requirement. Increase pressure capability of pump.
L. Obstruction in suction piping
Locate and remove obstruction. Attach strainer.
M. Suction lift too high
Check with gauge or measure vertical distance between water surface and
center line of pump, allowing for friction loss in suction pipe. Reduce rate of
flow to obtain desired lift. Refer to pump performance chart.
N. Discharge head too low
Decrease rate of flow
O. Suction inlet not immersed deep enough
Refer to “Installation”
P. Leaky suction line or connection admitting air
Repair or replace suction line. Tighten connections.
PROBABLE CAUSE
SYMPTOM
ENGINE
PUMP
SYSTEM
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
No water delivered
X
X
X
X
X
X
X
Not enough water delivered
X
X
X
X
X
X
X
Not enough pressure
X
X
X
X
X
X
Engine heats excessively
X
X
X
X
X
X
X
Abnormal noise and/or vibration
X
X
X
X
X
X
X
Pump works for a while, then stops
X
X
X
X
X
X
Troubleshooting Guide
