Troubleshooting - Major 1150 Slurry Vac Operator's Manual & Parts List

Troubleshooting

Fault
Insufficient Pump Output
Insufficient Pressure Build-up
Pump Overheating
Pump seized
Little vacuum or pressure in tank
Overheating of exhauster/compressor
Beat against external surface of
exhauster/compressor
Sewage comes out of exhaust elbow of
exhauster /compressor
Fumes come out of exhaust elbow of
exhauster/compressor
Lack of circulating lubricating oil in
Exhauster / compressor
Tank does not fill
NOTE: For vacuum pumps, a fill factor
of ca. 90% is normal. A 6" hose has a
capacity of ca 3500 litres/min.
Hydraulic gate valve doesn't respond
Possible Cause
Pump Vanes Sticking
Tank Air leak
Pump vanes worn
Pump to tank hose faulty
Lack of oil in Pump reservoir
Oil drip feed blocked. Incorrect oil drip
valve settings.
Rotor bent
Broken pump vanes
Blades are worn
Some blades are jammed in the rotor
Air filtration or leakage in system
Undulated cylinder
Reversing gear badly positioned
Flange assembly too light
Excessive pressure
Excessive revs
Excessive working time
Blades too long
Lack of lubrication
Revs too low
Vacuum too high
Top trap valves working incorrectly
Excessive lubrication
Air intake ay pipe fitting
Lubrication tube badly inserted in pipe
fittings
Air in oil pump chamber
The upper cut-off valve closes too early.
Blades of the pump are worn out.
Slurry is extremely thick.
Slurry drain is too deep.
Hydraulic pressure hose is connected
incorrectly
Gas-spring cylinder defect
Fastening eye of the cut-off valve is broken
(as a result of frost or dirt)
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Remedy
Increase Oil Flow
Tighten inspection cover or replace seal.
Replace with complete new set together with
gasket and oil seal.
Tighten clips or renew. Ensure Gate Valves
are closed.
Fill with SAE 20 oil or in summer use SAE 30.
Clear blockage, set to 1 drop per 3 seconds.
Replace.
Replace with complete new set together with
gasket and oil seal.
Replace blades
Disassemble Exhauster/Compressor, clean
and wash rotor, blades and body
Eliminate infiltrations
Smooth or replace body
Disassemble and position correctly
Add a gasket to the back of the flange
Reduce pressure
Reduce revs
Reduce working time
Trim blades to correct size
Check oil level in tank. Functioning of oil
pump, regulation of oil tap
Increase revs
Reduce vacuum
Check top trap valves
Adjust lubrication
Replace pipe fittings
Insert correctly
Fill pump chamber with oil
Allow the pump to rotate at a lower RPM. (a
pressure of 0.7 bar is ideal) OR install under
pressure valve on the tank.
Replace the blades.
Dilute or mix the slurry
Move the drawing-in hose.
Mount a piece of 8" hose at the end of the
hose, with a reducer of 6-8".
Reconnect correctly
Replace cylinder
Remove dirt in the cut-off valve box. OR
Replace the cut-off valve.
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