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7.2 Troubleshooting electrics
A stable power supply is necessary for the
electrical control unit to function satisfactorily.
Any drop in voltage from cables and switches
must not result in an operating voltage lower
than 11V on the command panel and the so-
lenoids.
Use the original Taarup battery power cable
only.
Sources of electrical fault:
Generally: Look for error messages in the
command panel display.
a. Poor power supply from battery (large
voltage drop, brief power failure).
Needs particular checking when a fault arises
as a result of changing tractors.
b. Damage to cables/switches.
Check the connection with a multimeter (re-
sistance measurement/W).
c. Poor connection in connectors.
Tighten the collar in order to achieve proper
contact.
d. Fault on sensors.
Check that light of sensor flashes when pow-
er is on and sensor is activated, or check with
a multimeter (resistance measurement/R)
and steel piece (“magnet”). When the steel
piece is held near the sensor, the resistance
should be approximately equal to zero (short
circuit).
Check even that the respective control light
(X) in the driver module is activated when a
piece of steel is approaching the sensor. Re-
move the module cover to observe the control
lights.
e. Fault on command panel.
Possible remedy:
Check wiring - particularly the cable between
the black box and the command panel (“data
transfer cable”).
Check for any short circuit on the sensor ca-
bles.
7.1 Troubleshooting hydraulics
d. Contaminated oil.
Badly contaminated oil is extremely detrimen-
tal to the hydraulic system. Bear in mind the
timed intervals for checking and replacing
filter and oil - see sections 6.2.1 and 6.2.2.
Contaminated oil can contain large amounts
of particles, which cannot be filtered, but can
nevertheless cause wear to the motor seal
and blocking of valve spools.
Experience shows that the hydraulic oil in the
tractor is often badly contaminated by parti-
cules and water.
The fault is impossible to repair.
Contact your Taarup dealer. Any kind of infor-
mation regarding faults found is useful for a
quick repair.
Maintenance
a. Oil flow block in quick-release cou-
plings to tractor.
This may, for example, produce pressure on
return pipe (blocked return coupling). Try
quick-release coupling adapted to tractor.
b. Intensive heating of oil.
Oil temperatures of up to 80º C are not unu-
sual during continuous operations. 60º C
feels very hot when touched. Check that the
plug for closing the centre of the central unit
(John Deere plug) is being used correctly
(only on tractors with variable hydraulic
pumps, i.e. mainly John Deere).
c. Fault in spool valve unit.
Check that the actual spool is moving
smoothly. See spool valve overview.
Fit spool handle and ease the malfunctioning
spool back and forth a few times first.
Observe! Reduce oil flow from the tractor to a
minimum before testing and keep your dis-
tance from moving parts on the machine.
If the functions can be operated, the problem
is electrical.
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