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7 -
TROUBLESHOOTING###_8_###
Fault code resolution
Troubleshooting - Foreword
The following troubleshooting information will help you in the unlikely event a problem occurs with your equipment.
Reading the troubleshooting chart is easy. The left-hand column will be the problem you may be having with your
equipment. The center column explains the possible cause or causes of the problem. The right-hand columns gives
you corrective actions you can take to solve the problem. If you feel unsure how to handle the problem with your
equipment do not hesitate to contact your NEW HOLLAND dealer for assistance.
Hydraulic systems - Troubleshooting
Problem
The machine cannot be
operated at the start
The machine loses power
after functioning normally
Lifting and implementing
cylinders malfunctioning,
other cylinders
functioning.
Non-functioning lifting
and implement cylinders
7 - TROUBLESHOOTING
Possible Cause
Low hydraulic oil level.
No oil supply.
Low system pressure from pump.
Hydraulic hoses incorrectly connected.
Excessive back pressure.
Pressure relief valve working irregularly or
set too low.
The hydraulic hoses to/from control valve
are "blocked".
Low hydraulic level.
Loose hydraulic hoses, leaking moving
parts or hoses.
Piston in lifting cylinders leaks.
Excessive back pressure.
Pressure relief valve working irregularly or
set too low.
Spool does not have full stroke.
Loader control valve or tractor's main relief
valve is stuck in the open position.
Check that the check ball in the anti-cavita-
tion valve is seated properly.
Loose hydraulic hoses, leaking moving
parts or hoses.
Limitations to movable parts or hoses.
Piston in lifting cylinders leaks.
Piston unit damaged (does not seal).
Lifting cylinder piston rods bent
Worn out or damaged piston seal. External
leakage.
Spool does not have full stroke.
Pressure relief valve working irregularly or
set too low.
Check and top up with hydraulic oil.
Connect the tractor to the power outlet.
Check the power outlet. Connect the pump
to the power outlet.
Important! Check that the hoses are cor-
rectly installed to the valve.
Restriction between the "in" and "out" port
and the reservoir.
Contact your dealer.
Check hoses and couplings for leakage,
abrasion and twist.
Check and top ip with hydraulic oil.
Tighten hoses, replace damaged O-rings if
leaking. Replace damaged hoses.
Contact your dealer.
Restriction between the "in" and "out" port
and the reservoir.
Contact your dealer.
The spool motion should be 5/16" or in one
direction or 5/8" total.
Contact your dealer.
Clean the anti-cavitation valve properly. Be
sure that it moves freely and is correctly
placed or replace it.
Tighten hoses, replace damaged O-rings if
leaking. Replace damaged hoses.
Replace damaged hoses and movable
parts. Check stripped hoses.
Contact your dealer.
Contact your dealer.
Contact your dealer.
Contact your dealer.
The spool motion should be 5/16" in one
direction or 5/8" total.
Contact your dealer.
7-1
Correction
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