Abbey Machinery Slurry Tanker, Maintenance, Operating Instructions And Spare Parts List, Page: 68 / 72

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9.0 Trouble Shooting For Slurry Tankers
Don’t panic, take your time and think through the problem logically, LOOK FOR THE OBVIOUS! Things like
damaged hoses, loose fittings or wrongly connected quick release fittings (at the tractor) will cause problems.
Try to identify common conditions or circumstances where the problem exists.
Change only one thing at a time when trying to identify the problem area, if that doesn’t solve it, put it back
the way it was, and then try the next thing. Changing more than one thing at a time can cause confusion.
Vacuum Pump
1. Overheating of Vacuum Pump:
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Check that the oiler is getting the right amount of drops per min
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Check that 6/8” fill valve is open fully and that nothing is blocked
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Reduce rev’s on tractor to 540 RPM
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Excessive use, pump should only be run up to 8mins at a time
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Blades are too long:
i. Open back plate and add gaskets or
ii. Take out veins and trim off ends
2. Oiler working intermittently or not at all.
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Have you used the correct oil. Heavy oil will not travel through the system
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Check pipes connecting reservoir, pump and that oilers are not blocked
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Clean out oiler
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Oil pump on back housing may be defected and needs to be replaced
3. Pumps veins sticking:
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Revs too low, increase to 540 RPM
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Run diesel through the pump to clean out
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Have you been using milking machine oil? This swells the veins and causes veins to stick.
Replace all veins
4. Pump Seized:
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Using milking machine oil(Vacuum oil) can lead to veins jamming and breaking in rotor either
causing it to just jam the rotor or it could also lead to bending the rotor
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Excess use and not replacing the veins can lead to the same
5. Insufficient Pump Output:
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Veins too short or worn
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Veins sticking in rotor
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Lack of oil feed
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Are there any air leeks?
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Is the pressure relief valve set correctly? Factory sets this at 0.8 bar
6. Pump Handel Sized or very stiff:
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Operating temperatures too low and has frozen. Wait to taw
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Bottom of selector valve needs a slight shim inserted
7. Slurry comes out of exhaust:
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Is there excessive effluent in the slurry causing it to fraught?
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Ball in traps has gone oval and needs to be replaced