MacDon M155 - Page 456

TROUBLESHOOTING
Symptom
Problem
Solution Section
Broken pump ar
m or shaft
Contact Deale
r.
Contact Deale
r
One final drive disengaged Engage final drive.
Final Drives, page
191
Steering co
ntrols worn or
defective
Check GSL an
dsteeringforloose,
worn or dama
ged ball joints and
connecting
rods.
5.5.3 Ground
Speed
Lever (GSL)
Adjustment
s,
page 317 and
5.5.4 Steer
ing
Adjustment
s, page
319
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, and replace.
5.5.3 Ground
Speed
Lever (GSL)
Adjustments,
page 317 and
5.5.4 Steering
Adjustments, page
319
Brakes binding or not
releasing fully
Che
ck pressure on brake release
val
ve (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 p roperly tightened
Tighten filter element.
Hydraulic oil filter
leaks at seal
Damaged seal or threads Replace filter or filter head.
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