Service Manual

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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
o
r 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 charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
The successful operation of the Pro Sweep 5200 de-
pends on the hydraulic system of the tow vehicle. When
troubleshooting
a sweeper hydraulic problem, make
sure that the tow vehicle hydraulic system is evaluated
as well.
NOTE: When troubleshooting a hydraulic problem on
t
he Pro Sweep 5200, inspect tow vehicle hydraulic sys-
tem if both sweeper brush motor and lift cylinder are mal-
functioning. If one sweeper hydraulic component
appears to be malfunctioning, check that component.
Problem
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Possible Cause
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Hydraulic oil leaks.
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Hydraulic fitting(s) or hose(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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Hydraulic oil level in tow vehicle reservoir is low.
Hydraulic system has wrong kind of oil.
Hydraulic system on tow vehicle is malfunctioning.
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Hydraulic system operates hot.
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Hydraulic oil level in tow vehicle reservoir is low.
Excessive dirt and debris on hydraulic components.
Oil is contaminated or too light.
Brush motor is worn or damaged.
Hydraulic system on tow vehicle is malfunctioning.
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Brush motor will not turn.
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Hydraulic hose(s) to tow vehicle are not connected.
Control manifold brush solenoid (S2) is not being energized or car
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tridge is faulty.
Control manifold demand solenoid (S3) is not being energized or
cartridge is faulty
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Internal brush motor components are damaged.
Electrical problem exists (see Chapter 4 – Electrical System).
Hydraulic System Page 3 – 10 Pro Sweep 5200