Traction Drive Troubleshooting - MacDon M1170 Operator's Manual

7.5 Traction Drive Troubleshooting

Problem
Symptom: The warning alarm sounds and the low charge pressure warning appears on the Harvest Performance
Tracker (HPT).
Low hydraulic oil level
Low hydraulic pressure
Faulty sender
Symptom: Wheels lack necessary ability to pull on a grade or when pulling out of a ditch.
Internal pump or motor damage
Insufficient torque at drive wheels
Loose or worn controls
Brakes binding or not releasing fully
Relief valve in tandem pump dirty or
damaged
Symptom: With the steering wheel centered, one wheel pulls more than the other wheel.
Leakage at pump or motor
Binding or interference with controls
under cab
Faulty relief valve
Symptom: Both wheels will not pull in forward or in reverse.
Loose hardware on pump controls
Brakes binding or not releasing fully
Low oil level and low charge pressure
Wheel drives disengaged
Servo input loose
Failed pump
Symptom: One wheel will not pull in forward or in reverse.
Broken pump arm or shaft
Steering controls worn or defective
High pressure relief valve stuck open,
damaged seat
Brakes binding or not releasing fully
Failed pump, motor or final drive
214733
TROUBLESHOOTING
Solution
Stop engine, and add oil to hydraulic
system.
Contact Dealer.
Contact Dealer.
Contact Dealer.
Maintain engine rpm, decrease GSL
setting.
Check controls.
Check charge pressure.
Replace relief valve.
Contact Dealer.
Contact Dealer.
Repair or replace valve Contact Dealer. Contact Dealer
Repair or tighten.
Check charge pressure.
Check oil reservoir level.
Engage wheel drives.
Check servo.
Contact Dealer.
Contact Dealer.
Check GSL and steering for loose,
worn or damaged ball joints and
connecting rods.
Contact Dealer.
Check charge pressure.
Contact Dealer.
410
Section
5.7.3 Checking Hydraulic Oil, page 290
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Contact Dealer
Contact Dealer
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Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
5.7.3 Checking Hydraulic Oil, page 290
Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
Contact Dealer
Revision A