Troubleshooting; Transmission Operates In One Direction Only; System Operates Hot, Looses Power Or Will Not Operate In Either Direction - Toro Hydroject 3010 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 is a potential 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

Transmission Operates in One Direction Only

Cause
__________________________________________________________________________________________
Faulty traction control linkage.
________________________________________________________________________________________________________________________________________________________
Transmission charge check valve defective.

System Operates Hot, Looses Power or Will Not Operate in Either Direction

Cause
__________________________________________________________________________________________
Faulty control linkage.
________________________________________________________________________________________________________________________________________________________
Parking brake engaged.
________________________________________________________________________________________________________________________________________________________
Hydraulic oil level too low.
________________________________________________________________________________________________________________________________________________________
By-pass valve open.
________________________________________________________________________________________________________________________________________________________
Clogged hydraulic filter.
________________________________________________________________________________________________________________________________________________________
Low charge pressure - Test A.
________________________________________________________________________________________________________________________________________________________
Low traction pump flow/pressure - Test B.
________________________________________________________________________________________________________________________________________________________
Low traction motor efficiency - Test C.
Troubleshooting
system could lead to extensive internal component
damage.
The charts that follow contain detailed information to
assist in troubleshooting. There may possibly be more
than one cause for a machine malfunction. All causes
should be checked in the order in which they are listed
on the charts.
Refer to the Testing section of this Chapter for precau­
tions and specific test procedures.
Correction
Repair linkage
Inspect and clean or replace charge/check.
Correction
Repair linkage
Disengage parking brake.
Fill to proper level.
Close by-pass valve.
Replace filter.
Inspect charge relief valve and replace if faulty.
Inspect charge pump and replace if faulty.
Repair or replace pump.
Repair or replace traction motor.
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