Flowplant 003301, Operation & Maintenance Manual

Page: 37 / 66

37
6.1. Equipment Fault Finding
Problem Possible Cause Recommended
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 to 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 the old jetting
Nozzle with a new one.
Adjust to correct speed.
Check the connections for
tightness, replace if needed
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 Incorrect nozzle size.
3 Incorrect bore size.
4 Engine speed high.
5 Crushed delivery hose.
6 Two gun choke left in gun when
operating as single gun unit.
Clean the items and flush out
the delivery line.
Replace the nozzle.
Replace the hose.
Adjust to correct speed.
Replace if necessary.
Replace with standard choke.
Low Water Level
1 Blocked or dirty pre-filters.
2 Faulty ball valve assembly.
3 Wrong seat in ball valve
assembly.
4 Low inlet pressure. Clean or replace elements.
Replace if necessary.
Replace the seat if
necessary.
Increase pressure.
Pump Not Running
Evenly (also refer to
pump faults).
1 Air in water.
2 Air in crankcase oil.
3 Worn drive coupling.
4 Faulty inlet or delivery valve.
5 Valve nut over tightened. Water bleed pump.
Oil bleed pump.
Replace flexible elements
and examine coupling.
Check valve condition.
Check tightness of inlet &
delivery nut
Burst Disc failure or
Safety Relief Valve
Operating (also refer
to high system
pressure problem).
1 Incorrect burst disc.
2 Incorrect valve setting.
3 Faulty Valve.
4 Faulty or fatigued burst disc. Replace with correct disc.
Check certificate/setting.
Repair or replace if required.
Replace with new disc.