Nortrac 40XTD - Page 41

Page 41 / 48
3. Brake
Failure
Possible Cause
Corrective Action
Brakes are not
sensitive enough.
There is grease or oil on brake
bands.
Replace.
Brake bands are excessively worn.
Replace.
The free stroke of brake is
excessive.
Re-adjust.
Brake will not
return.
The free stroke is too small.
Re-adjust.
It’s too small of the clearance
between the brake bands.
Re-adjust.
The brake arm does not return.
Check whether the return
spring works.
4. Steering Clutch
Failure
Possible Cause
Corrective Action
Steering clutch slips (with heavy
loads, the sound of exhaust pipe isn’t
heavy, but the bulldozer gives a weak
traction force, when traveling slowly
or turning to one side without
controlling the steering system).
There is grease or oil on the
clutch disc.
Replace.
The clutch disc is excessively
worn.
Replace.
The steering free stroke is too
small
Re-adjust.
The steering will not disengage
completely.
The free stroke of steering is
excessive.
Re-adjust.
The free stroke of brake is too
small.
Re-adjust.
5. Hydraulic System
Possible Cause
Corrective Action
Load will not lift or lifts slowly.
There’s much air in the system.
Check the system for
leakage and repair.
The filter is blocked.
Replace the filter.
Pressure is too low in the relief valve.
Add pressure.
The cylinder sealing ring is damaged.
Replace the ring.
There is a serious leak inside the oil
pump.
Repair or replace.
Unable to lift without load.
There is no pressure of the system.
The hydraulic tank is short of oil. The
ring sealing of the joint is damaged or
it’s not torqued enough to tighten the
oil pump.
Supply oil according to
requirements.
Replace the ring or
retighten the pump.
The cylinder’s ring doesn’t work.
Replace.
There’s a leak at the relief valve.
Clean or replace.
Unable to lower after lift.
Main control valve is blocked at the lift
position.
Clean.
Blade or 3-point hitch system
vibrates during lift, lifts poorly, or
fails to lift.
It’s badly worn and poorly sealed
between the main control valve body
and the valve spool.
Replace parts.
Cylinder is badly worn and the seal
ring is damaged.
Replace parts.
Poor sealing in the relief valve.
Clean and replace.