Troubleshooting; Troubleshooting - Toro Pro Sweep 07066 Service Manual

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 of the tow vehicle, locate the cause
of the trouble and correct it before allowing the machine
to be used again. Continued use of an improperly func-
tioning hydraulic system could lead to extensive hydrau-
lic component damage.
The charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
Problem
Hydraulic oil leaks.
Foaming hydraulic fluid.
Hydraulic system operates hot.
Hydraulic System
The successful operation of the Pro Sweep depends on
the hydraulic system of the tow vehicle. When trouble-
shooting a sweeper hydraulic problem, make sure that
the tow vehicle hydraulic system is evaluated as well.
NOTE: When troubleshooting a hydraulic problem on
the Pro Sweep, inspect tow vehicle hydraulic system if
sweeper brush motor, offset cylinder and lift cylinder are
all malfunctioning. If one sweeper hydraulic circuit ap-
pears to be malfunctioning (e.g. the brush circuit and lift
cylinder are working but the offset cylinder will not func-
tion), check the non--functioning circuit and its compo-
nents.
Possible Cause
Hydraulic fitting(s) or hose(s) are loose or damaged.
O--ring(s) or seal(s) are missing or damaged.
Hydraulic oil level in tow vehicle reservoir is low.
Hydraulic system has wrong kind of oil.
Hydraulic system on tow vehicle is malfunctioning.
Hydraulic oil level in tow vehicle reservoir is low.
Excessive dirt and debris on Pro Sweep hydraulic components.
Hydraulic oil is contaminated or too light.
Brush motor is worn or damaged.
Hydraulic system on tow vehicle is malfunctioning.
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