HARBEN CENTURY, Руководство по обслуживанию

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Flowplant Century Pump Manual
3.4 FAULT FINDING
3.4.1 General
It is essential when fault finding on the pump that due regard is taken of the likely
equipment faults. Therefore Table 3.1 includes likely equipment faults, whilst Table 3.2
gives likely pump faults. For details of engine faults refer to the appropriate
manufacturer's handbook. When investigating a pump diaphragm for possible failure,
refer to Fig 3.2.
TABLE 3.1 EQUIPMENT FAULT FINDING
Problem Cause Action
Low System Pressure 1. Worn or incorrect size of
cutting nozzle.
2. Engine speed slow.
3. Leaks from hose,pipes
and connections.
4. Blocked inlet filter.
5. Inlet hose too long.
6. Loss of water through
dump line of selector
valve or gun when high
pressure selected.
7. Loss of water through
dump line of remote
control kit, if fitted.
Replace nozzle.
Adjust to correct speed.
Check connections for
tightness. Replace as
necessary.
Clean or replace element.
Shorten hose length.
Check seats and seals.
Check seats and seals.
High System Pressure 1. Blocked nozzle, selector
valve or gun.
2. Nozzle size too small.
3. Hose bore size too small.
4. Engine speed high.
5. Crushed delivery hose.
6. Two gun choke left in
gun when operating as
single gun unit.
Clean nozzle, selector valve
or gun and flush out delivery
line.
Replace nozzle.
Replace hose.
Adjust to correct speed.
Replace if necessary.
Replace with STD choke.
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