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.
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.
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
Refer to the Testing section of this Chapter for precau
tions and specific test procedures.
Transmission Operates in One Direction Only
Cause
Correction
__________________________________________________________________________________________
Faulty traction control linkage.
Repair linkage
________________________________________________________________________________________________________________________________________________________
Transmission charge check valve defective.
Inspect and clean or replace charge/check.
System Operates Hot, Looses Power or Will Not Operate in Either Direction
Cause
Correction
__________________________________________________________________________________________
Faulty control linkage.
Repair linkage
________________________________________________________________________________________________________________________________________________________
Parking brake engaged.
Disengage parking brake.
________________________________________________________________________________________________________________________________________________________
Hydraulic oil level too low.
Fill to proper level.
________________________________________________________________________________________________________________________________________________________
By-pass valve open.
Close by-pass valve.
________________________________________________________________________________________________________________________________________________________
Clogged hydraulic filter.
Replace filter.
________________________________________________________________________________________________________________________________________________________
Low charge pressure - Test A.
Inspect charge relief valve and replace if faulty.
Inspect charge pump and replace if faulty.
________________________________________________________________________________________________________________________________________________________
Low traction pump flow/pressure - Test B.
Repair or replace pump.
________________________________________________________________________________________________________________________________________________________
Low traction motor efficiency - Test C.
Repair or replace traction motor.
Troubleshooting
Page 4 - 8
Hydroject 3010
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