Maintenance, Troubleshooting guide, Performance chart – Simer Pumps 4955 User Manual
Page 3: Running the engine, Pump lubrication
RUNNING THE ENGINE
Refer to engine operation part of this manual for starting and
operating instructions.
Pump performance varies depending on engine R.P.M.
Refer to engine operation 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.
3
CAUSE
CORRECTIVE ACTION
1. ENGINE
A. Speed too low
Refer to engine section
B. Rotating and/or reciprocating parts drag
Refer to engine section
C. Speed too high
Maximum engine speed not to exceed engine manufacturer’s recommendation.
D. Loose or broken parts
Refer to engine section
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
Depth
Gallons per Minute at Discharge Pressure
Maximum
to Water
15 PSI
25 PSI
35 PSI
45 PSI
50 PSI
PSI
0 ft.
141
120
95
65
50
58
5 ft.
130
110
85
55
40
55
10 ft.
121
100
75
45
25
52
15 ft.
113
90
65
30
2
50
20 ft.
105
80
55
7
–
48
25 ft.
80
60
40
2
–
45
Performance Chart