TROUBLESHOOTING
* See Your MacDon Dealer
** Refer to Windrower Technical Manual
Form 169552 / 169554 / 169555
189
Revision A
SYMPTOM
PROBLEM
SOLUTION
SECTION
Both Wheels Will Not Pull In
Forward or Reverse (cont’d).
Charge pressure relief valve
misadjusted or damaged.
Check the valve adjustment.
Check valve parts and seat.
7.11.6.2
Failed pump or motor.
Contact your Dealer.
*
One Wheel Does Not Pull In
Forward or Reverse.
One final drive disengaged.
Engage final drive.
6.3.9.1
Steering controls worn or defective.
Check GSL and steering for
loose, worn or damaged ball
joints and connecting rods.
7.7.3 &
7.7.4
Brakes binding or not releasing fully.
Check pressure (min. 200 psi
(1379 kPa)) on brake release
valve.
**
High pressure relief valve stuck open,
damaged seat.
Check valve and clean or
replace.
Pump arm or shaft is broken.
Contact your Dealer.
*
Damaged hydraulic lines preventing
proper oil flow.
Speed-range control not working.
Failed pump, motor or power hub.
With Steering Wheel Centered,
One Wheel Pulls More Than The
Other.
Leakage at pump or motor.
Wheels not in same speed range.
Faulty relief valve.
Repair or replace valve.
7.11.6.2
Excessive Noise From Drive
System.
Hydraulic line clamps loose.
Tighten clamps.
---
Air in system.
Check lines for leakage.
Mechanical interference in steering or
ground speed linkage.
Adjust, repair, replace.
7.7.3 &
7.7.4
Brakes binding or not releasing fully.
Check pressure (min. 200 psi
(1379 kPa)) on brake release
valve.
**
Faulty pump or motor.
Contact your Dealer.
*
Hydraulic Oil Filter Leaks At
Seal.
Not properly tightened.
Tighten filter element.
7.11.4
Damaged seal or threads.
Replace filter or filter head.
8.6 STEERING AND GROUND SPEED CONTROL
SYMPTOM
PROBLEM
SOLUTION
SECTION
Machine Will Not Steer Straight.
Linkage worn or loose.
Replace worn parts.
Adjust linkage.
7.7.4.1
Machine Moves on Flat Ground
With Controls In NEUTRAL.
Neutral interlock misadjusted.
Contact your Dealer.
*
Parking brake not functioning.
GSL cable misadjusted.
Steering Wheel Will Not Lock
With GSL In N-DETENT.
Transmission interlock misadjusted.
Steering Wheel Will Not Unlock.
Transmission interlock cylinder not
working.
Insufficient Road Speed.
Speed-range control in field
position - 1 (0 - 11mph (17.7 km/h)).
Switch to road speed position - 2
(0 - 16 mph (25.7 km/h)).
6.3.8.1