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Serial #10127003 and Later
HF SERIES
GENERAL PUMP
A member of the Interpump Group
14. WARRANTY CONDITIONS
The guarantee period and conditions are contained in the purchase agreement.
A)
The pump is used for purposes other than the agreed
B)
The pump is driven by an electric motor or internal combustion engine having performance values exceeding
those shown in the table.
C) The safety devices have been tampered with or they have been disconnected.
D) The pump has been used as accessories or spare parts not supplied by General Pump.
E)
Damage has been caused by:
1) Improper use
2) Failure to follow maintenance instructions
3) Any use different from that described in the operating instructions
4) Lack of sufficient flow rate
5) Defective installation
6) Improper positioning or sizing pipes
7) Unauthorized design modifications
8) Cavitation
THE PUMP DOES NOT PRODUCE ANY NOISE:
- The pump is not primed and is running dry!
- No water in the inlet line.
- The valves are blocked.
- The pressure line is closed and does not allow
the air to get out the fluid end.
THE PUMP KNOCKS:
- Air suction.
- Insufficient Suppy.
- Bends elbows, fittings on the suction line are
choking the passage of liquid.
- Suction filter is dry or too small.
- The booster pump, where installed, is
supplying insufficient pressure or flow rate.
- The pump is not primed due to insufficient
head or the outlet is closed during priming.
- The pump is not primed due to valve jamming.
- Worn valves.
- Worn pressure seals.
- Imperfect functioning of the pressure control
valve.
- Problems on the transmission.
THE PUMP DOES NOT DELIVER THE
RATED VOLUME:
- Insufficient feeding (due to the cause
listed above).
- RPM are less than rated.
- Excessive amount of water by-passed.
by the pressure regulating valve.
- Worn out valves.
- Excessive leakage from pressure
packings.
- Cavitaion due to:
1) Impropor sizing of suction ducts /
undersized diameters.
2) Insufficient flow rate.
3) High water temperature.
INSUFFICIENT PUMP PRESSURE:
- The nozzle is (or has become) too large.
- RPM are less than rated
- Excessive leakage from pressure
packings
- Excessive leakage from the pressure seal.
- Worn out valves.
EXCESSIVE WATER LEAKAGE FROM
THE PUMP:
- Pressure packing are excessively worn
out (due to normal wear or excessive
cavitation).
- Worn out plungers
OVERHEATED PUMP:
- The pump is working in overpressure
conditions or pump rpm is higher than the
nominal value.
- Oil in the pump casing is not at level or not
the recommended type as stated in
chapter 7 (par. 7.6).
- Excess belt tension or joint or pulley
alignment is incorrect.
- Excessive pump tilt during operation.
PIPE VIBRATIONS OR KNOCKING:
- Air suction.
- The pressure regulating valve does not
work properly.
- The by-pass line is undersized.
- Jammed up valves.
- Drive transmission motion is irregular.
15. TROUBLE SHOOTING
Ref 300764 Rev. F
05-21
