MacDon M155 Operators Manual - Manual (Page 414)

TROUBLESHOOTING
Symptom Problem Solution Section
Broken pump arm or shaft Contact Dealer. Contact Dealer.
One final drive disengaged Engage final drive.
Final Drives, page
135
Steering controls worn or
defective
Check GSL and steering for loose,
worn or damaged ball joints and
connecting rods.
5.7.3 Ground
Speed
Lever (GSL)
Adjustments,
page 276
and
5.7.4 Steering
Adjustments, page
278
High pressure relief valve
stuck open, damaged seat
Check valve, and clean or replace. Contact Dealer.
Brakes binding or not
releasing fully Check pressure on brake release
valve) (min. 200 psi [1379 kPa]).
Damaged hydraulic lines
preventing proper oil flow
Ground speed range control
not working
One wheel does
not pull in forward
or reverse
Failed pump, motor or power
hub
Contact Dealer.
Contact Dealer.
Mechanical interference in
steering or ground speed
linkage
Adjust, repair, replace.
5.7.3 Ground
Speed
Lever (GSL)
Adjustments,
page 276
and
5.7.4 Steering
Adjustments, page
278
Brakes binding or not
releasing fully Check pressure on brake release
valve) (min. 200 psi [1379 kPa]).
Faulty pump or motor Contact Dealer.
Contact Dealer.
Air in system Check lines for leakage.
Excessive noise
from drive system
Hydraulic line clamps loose Tighten clamps.
—
Not properly tightened Tighten filter element.
Hydraulic oil filter
leaks at seal
Damaged seal or threads Replace filter or filter head.
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Revision A