Troubleshooting Guide - Koshin Agro-Mate PGH-50 Mode D'emploi

5 Fill pump with water before use.
EN
As pump is self-priming type, fill water fully from priming port into
pump before running. Insufficient water can cause damage to pump.
CAUTION
Running without filling water can damage mechanical seal.
If pump fails to draw water after filling up pump casing through the plug, it is likely due
to air leak caused by poor connection of suction hose. Check the connection of suction
hose and try again. See [ BEFORE USE ] "
Use the correct suction hose. Use attachment coupling and hose band and install
firmly. Make sure to attach the attachment strainer at the end of the suction hose.
HOW TO USE
1
Ensure pump is fully filled up with water.
2 Ensure strainer at the end of suction hose is in water.
(If any mud or sand is at the bottom of water, suspend hose avoiding the bottom.)
Set pump near water source and bring pump as close to water level as possible.
The farther away from water source, the lower the pump performance becomes.
3 Ensure no obstacle is at delivery hose side.
Beware of water hammering
Do not allow any vehicle to run over the delivery hose.
Do not close the delivery valve abruptly because water hammer
may occur. This may result in heavy damage to the pump.
For engine operating, please refer Engine Operation Manual enclosed.
4 If pump doesn't lift water 5 minutes after starting engine, pump case will be hot.
Stop the engine and drain out water from plug. Change water. If the pump still doesn't lift
water after water change, see the [TROUBLESHOOTING GUIDE]
ATTENTION AFTER USE
1
Drain water after use.
2 Long storage.
Discharge fuel in fuel tank and carburetor completely.
Unused fuel in tank (if kept more than 30days) may cause
engine failure. *Please refer "Engine Operation Manual".
Water inside may freeze at below 0˚C in winter and may damage pump.
After use, drain water from drain plug before storing.
The farther away from water source, the lower the pump performance becomes.
Do not smoke as fuel is highly inflammable.
Unused fuel must not remain in the tank for long term storage.
Unused fuel may cause future engine failure.
Priming port
Water
How to Install Couplings" (P.5)
CAUTION
CAUTION
Collapse of Do not close delivery
delivery hose valve abruptly
Drain
CAUTION
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TROUBLESHOOTING GUIDE

PROBLEM POSSIBLE CAUSE
Old fuel.
Cannot pull
Rusting inside engine.
or hard to pull
Burn out of engine.
recoil starter.
Stick impeller.
Obstacles at impeller.
Air leakage from suction side.
Output power down from engine.
Damage of mechanical seal.
Suction lift is high.
Not enough
Suction pipe is too long or
delivery volume.
smaller in diameter.
Leakage of water from
delivery hose or pipe.
Obstacles at impeller.
Wearing out of impeller.
Air goes in from suction side.
Insufficient priming water
inside pump casing.
Pump does not
Drain plug is not tighten.
prime water.
Imperfect revolution of engine.
Damage of mechanical seal.
Wrong suction hose used.
Carburetor is choked.
Spark Plug is wet.
Air cleaner dirty.
Too much engine oil.
Engine does
(4 stroke engine)
not start.
Insufficient engine oil.
(4 stroke engine)
Even if you check above points,
still engine does not start.
Oil leakage form
Fall of engine.
muffler or air cleaner.
- 7 -
EN
SOLUTION
Replace to new fuel. If there is no
improvement, repair engine.
Refer to "Engine Operation Manual".
(Repair.)
Dismantle & clean the impeller.
Check piping at suction side.
Check & Repair engine.
Replace mechanical seal. (Repair.)
Make suction lift lower.
Shorten suction pipe or enlarge
diameter.
Check and stop leakage of water.
Dismantle & clean the impeller.
Replace the impeller. (Repair.)
Check piping at suction side.
Pour more water into pump casing for
priming. Refer [BEFORE USE] " Fill
pump with water before use"(P.6).
Tighten drain plug firmly. Please refer
[ATTENTION AFTER USE].
Refer to "Engine Operation Manual".
Replace mechanical seal. (Repair)
Use suction hose correctly.
Repair.
Check & repair the plug.
Clean air cleaner.
(Refer to "Engine Operation Manual".)
Adjust engine oil to suitable level.
Function of oil alert (oil sensor) is working.
(This function protects engine. If volume of engine
oil is not suitable level, engine does nor start.)
Possibility of damage, inner parts of
engine. (Repair.)
Repair.