2. PRIMING TIME.
With a suction lift from 5 to 10ft., the pump should discharge liquid in less than a
minute. A suction lift of 25ft (at sea level) should require not more than 2 minutes
for initial prime. To further reduce priming time the engine speed may be increased,
after the engine is properly run in. If pumping does not start within this time, shut off
engine and check carefully to find the problem, (See TROUBLESHOOTING GUIDE).
NOTE: Filling the suction pipe with water will speed up the priming process, and it
is recommended that a foot valve (non-return valve) be fitted to the end of the
suction pipe.
3. CONTROL
.
On high suction lifts, a higher engine speed is necessary than on low lifts. On shallow
lifts therefore, or when there is little water to pump, preserve fuel and engine wear,
by reducing engine speed. (See engine manual).
4. STOPPING.
4.1 GRADUALLY reduce engine speed to minimum, and stop the engine by
switching OFF the ignition switch.
4.2 Close the fuel cock.
5. BLOCKAGES
In the event of blockages, where debris has entered the suction chamber, the
suction chamber bolts, (or quick release clamps on the larger pumps), allow the
chamber to be opened and cleaned
MAINTENANCE
A. ENGINE
Ensure the engine is maintained in accordance with the instructions given in the
engine manual, additionally, if the pump is not to be used for some time, it should
be prepared as follows:
1.
Drain the fuel tank and carburetor completely.
2.
Remove the spark plug, and pour 2 - 3 teaspoons of light oil into the cylinder
through the spark plug hole.
3.
Pull the starter recoil rope slowly, 2 or 3 times so that the oil is deposited on the
cylinder walls, and replace the spark plug.
B. PUMP
Always maintain the pump in a clean condition, checking regularly for loose bolts
etc. Additionally, drain the pump body whenever there is danger of freezing, and
if the pump has been used with contaminated or salty water, it should be thoroughly
flushed with clean water immediately after use, both
inside and out.
If the pump is not to be used for some time, it should be flushed thoroughly with
clean water, and drained completely before storing in a clean dry environment
FAULT
PROBLEM
REMEDY
A)
Pump fails to
prime
1. Fill priming chamber
leaving no air gap.
2. Carry out repairs as
necessary
3. Check connections,
and renew gaskets where
necessary.
4. Remove obstruction and
ensure there are no kinks
in delivery line.
5. Increase engine speed.
6. Renew Impeller.
7. Renew Seal.
8. Clean strainer, and
ensure it is not submerged
in mud or sediment etc.
1. Clean strainer, and ensure
it is not sub merged in
mud or sediment etc.
2. Remove obstruction and
ensure there are no kinks
in delivery line.
3. Avoid unnecessary curves,
restrictions or valves.
4. Set pump as near as
possible to the level of
the liquid to be pumped.
5. Increase engine speed.
6. Disassemble pump, and
clean.
B)
Low output
1. Priming chamber not filled correctly.
2. Air leaks through the suction line
joints (broken/damaged screws or,
rubber hoses, loose or broken hose
clamps
3. Quick coupling gaskets broken or
not correctly fitted.
4. Suction or delivery line obstructed
5. Pump speed too low.
6. Worn or broken impeller.
7. Air leaks through damaged
mechanical seal.
8. Suction strainer clogged
1. Suction strainer clogged.
2. Suction or delivery line obstructed
3. High friction losses in the suction line.
4. Suction lift too high.
5. Pump speed too low.
6. Impeller clogged.
TROUBLESHOOTING
NOTE: For engine problems, consult the manual supplied.
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