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Troubleshooting
The cause of an improperly functioning hydraulic sys-
tem is best diagnosed with the use of proper testing
equipment and a thorough understanding of the com-
plete hydraulic system.
A hydraulic system with an excessive increase in heat
or noise has a potential for failure. Should either of these
conditions be noticed, immediately stop the machine,
turn off the engine, locate the cause of the trouble and
correct it before allowing the machine to be used again.
Continued use of an improperly functioning hydraulic
system could lead to extensive hydraulic component
damage.
The chart below contains information to assist in trou-
bleshooting. There may possibly be more than one
cause for a machine malfunction.
Refer to the Testing section of this Chapter for precau-
tions and specific test procedures.
Problem
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Possible Cause
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Hydraulic oil leaks
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Hydraulic fitting(s), hose(s) or tube(s) are loose or damaged.
O–ring(s) or seal(s) are missing or damaged.
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Foaming hydraulic fluid
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Oil level in reservoir is low.
Hydraulic system has wrong kind of oil.
Pump suction (return) line has an air leak.
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Hydraulic system operates hot
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Oil level in reservoir is low.
Excessive dirt and/or debris on hydraulic components.
Oil is contaminated or too light.
Air trapped in hydraulic system.
Hydraulic pump is worn or damaged.
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Coring head will not lift or lifts slowly
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Engine speed is too low.
Reservoir oil level is low.
Pump drive belt is loose or worn.
Lift cylinder is binding.
Coring head is binding.
Control valve in hydraulic pump is stuck open.
Lift cylinder is leaking internally.
Hydraulic pump is worn or damaged.
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Coring head raises, but will not stay
up
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Lift cylinder is leaking internally.
Neutral position check valves in lift valve leak.
Hydraulic
System
Greens Aerator
Page 4 – 9
Hydraulic System
Summary of Contents for Greens Aerator
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