MacDon M155 Operators Manual - Manual (Page 412)

TROUBLESHOOTING
6.5 Traction Drive Troubleshooting
Symptom Problem Solution Section
Low hydraulic oil level
Stop engine, and add oil to hydraulic
system.
Checking and
Filling Hydraulic
Oil, page 360
Low hydraulic pressure
Foreign material shorting
sender
Short in alarm wiring
Warning alarm
sounds and
transmission oil
light is on
Faulty sender
Internal pump or motor
damage
Contact Dealer. Contact Dealer.
Insufficient torque at drive
wheels
Move ground speed range control
to field position, and reduce ground
speed. Driving Forward
in Engine-Forward
Mode, page 116
Loose or worn controls Check controls.
5.7.3 Ground
Speed
Lever (GSL)
Adjustments, page
276
Use proper oil.
Lubricants, Fluids,
and System
Capacities, page
263
Check oil level and leaks.
Checking and
Filling Hydraulic
Oil, page 360 Air in system
Check hydraulic oil filters.
5.7.9 Hydraulic
System, page 359
Brakes binding or not
releasing fully Check pressure on brake release
valve (min. 200 psi [1379 kPa]).
Wheels lack pulling
ability on a grade
or pulling out of a
ditch.
Relief valve in tandem pump
dirty or damaged
Replace relief valve.
Leakage at pump or motor
Wheels not in same speed
range
Contact Dealer.
With steering
wheel centered,
one wheel pulls
more than the
other
Faulty relief valve
Repair or replace valve. Contact
Dealer.
Contact Dealer.
169883
396
Revision A