Nortrac 35XT Owner's Manual page 53

Fault
4. Farm implements slowly
drop after being lifted, and
the descent becomes faster
after turning off the engine.
5. With the 3-point lift lever
at lifting position, the
hydraulic distributor makes
a loud noise.
6. The 3-point hitch has no
hydraulic pressure or weak
output.
Maintenance Instructions
Causes
(3) Gear oil pump failure.
(4) Hydraulic oil level is too low.
(1) The tightness of the check valve in
the hydraulic flow hydraulic flow
distributor is poor.
(2) The lowering valve is not sealed
tightly.
(3)The oil cylinder safety valve leaks
oil or is not adjusted properly.
(4) The O-ring for the oil cylinder is
damaged or leaking.
(5) The seal ring between the
distributor or the cylinder head and
the oil inlet hole on the 3-point lifter
shell is improperly
damaged.
(1) Because of improper adjustment,
the inner lifting arm props against the
lifter case to open the safety valve..
(1) The oil cylinder inlet line has been
disconnected.
(2)The front cone and conical hole of
the speed lowering control valve have
not been sealed tightly.
(3) Lifter is in the neutral lifting
position.
47
(4) Add lubricating oil according to the
requirements.
(1) Clean the check valve.
(2) Clean or replace the lowering valve.
(3) Repair or readjust the safety valve on
the oil cylinder.
(4) Replace the O-ring.
(5) Check and replace the seal ring.
installed or
(1) First measure the lifting height of the
farm implement. Then readjust and
shorten the force/position adjusting rod to
make the highest lifting position lower
than the original position.
(1) Tighten
adjustment knob clockwise to reduce the
lowering speed.
(2) Replace the valve.
(3) Push the lifter control handle to the
lowering position to lower the outer
lifting arm to the lowest position. Shut off
the inlet oil line to the oil tank, and then
put the operating lever in the lift position.
Troubleshooting
the lowering speed