Clarke CHF3 운영 및 유지 관리 지침 - 페이지 8

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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:

Drain the fuel tank and carburetor completely.

Remove the spark plug, and pour 2 - 3 teaspoons of light oil into the cylinder

through the spark plug hole.

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

TROUBLESHOOTING

NOTE: For engine problems, consult the manual supplied.

FAULT

PROBLEM

A) Pump fails to

1. Priming chamber not filled correctly.

prime

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

B) Low output

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.

REMEDY

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.