SECTION 3. TROUBLESHOOTING
Problem or symptom
Check or Solution
Wheels on machine will not
rotate
Noisy pump or Motor
Sluggish response to changes
in speed
Low power
Wheels rotate in one direction
only
Tractor moves without
pressing forward or reverse
pedal
Tractor Does not Move when
Forward or Reverse pedal are
Pressed
Check flex plate coupling between
engine and pump
•
Hydraulic level low in transaxle
• • •
Low charge pressure (see Tests and
Adjustments Section)
• • •
Main drive pressure relief valve stuck
open(see Test & Adjustments section)
• • • •
Air in system(see”HYDRAULIC
SYSTEM BLEED PROCEDURE” on
page 20)
• • •
Hydrostatic motor output pressure too
low
(see tests and Adjustments section)
• •
Internal pump or motor damage or
excessive wear
• • • •
Parking brake engaged or
malfunctioning
• •
Pump centering mechanism not
properly adjusted
• • •
Gear box malfunction
(see gear power Train section)
•
Servo valve malfunctioning
• • •
Pedal neutral position Not properly
Adjusted
•
Hydrostatic Control linkage Worn out
or Damaged
• • • •
4-9
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