Checking/Changing Engine Speed Sensor; Changing Pto Speed Sensor; Changing Gearbox Speed Sensor B2C - Valtra 6000 Workshop Manual

35. Autocontrol IV

Changing gearbox speed sensor B2C:

--- Remove the faulty sensor and clean the threads on the
tractor.
--- Apply Loctite 572 onto the sensor threads and turn it
against the gear wheel and then unscrew it 1/4 of a turn.
--- Lock the sensor with the nut and connect wires
--- Carry out the calibrating drive and check the speed sen-
sors, see instruction A.
--- When the sensor functions, fit a plastic tube onto the sen-
sor wire. Connect the wires to the sensor and protect
shoes with grease UC1913 (vaseline spray HHS 2000
(Wyrth)). Move the tube onto the sensor and warm it until
it is pressed tightly round the sensor.
--- Fold the wire on the sensor and fasten it with a plastic
binder. Fasten the wire also to the lock washer under the
sensor locking nut
N.B.: In transmission 50 km/h the sensor locking nut must
be removed and the sensor is locked with Loctite 572. This
must be done since in this transmission type the measur-
ing gear wheel is smaller and the sensor thread length is
insufficient.
Changing front axle speed sensor B5C:
--- Remove the faulty sensor
--- Screw a new sensor against the impulse plate and then
unscrew it 1/4 of a turn.
--- Lock the sensor with a locking nut and connect wires.
--- Carry out the calibrating drive and check the speed sen-
sors, see instruction A.
--- When the sensor functions, fit a plastic tube onto the sen-
sor wire. Connect the wires to the sensor and protect
shoes with grease UC1913 (vaseline spray HHS 2000
(Wyrth)). Move the tube onto the sensor and warm it until
it is pressed tightly round the sensor.
--- Fold the wire on the sensor and fasten it with a plastic
binder. Fasten the wire also to the lock washer under the
sensor locking nut
C. Checking/changing engine speed sen-
sor
The display unit shows the engine speed. Press the rotation
speed key until the display shows the engine speed. It should
be the same as the rotation speed shown by the instrument
panel tachometer (±50 r/min).
Model
1. 1. 1994
6600E
1. 1. 1995
8100E-- 8750E
If there is not the engine speed display or it is incorrect, check
the sensor and its wiring:
The sensor resistance should be 1,0 ---1,10 kΩ. The resis-
tance can be measured on the pins shown below. If the resis-
tance is infinite, it should be measured on the sensor pins in
order to clear up possible breaks:
Connector pins to measure the engine speed sensor
resistance:
A1C: 31 and 12.
X2C: 10 and 7
Sensor pins
Changing engine speed sensor,
gearbox speed sensor.
D. PTO speed sensor
Engage PTO 540 r/min. Press the rotation speed key until the
display shows the PTO speed. Adjust the engine speed so
that the tachometer indicator in the instrument panel is at the
540 mark. The display should also show the same PTO speed
(±50 r/min). The PTO shaft speed can also be measured with
a separate tachometer.
If there is not the PTO speed display or it is incorrect, check
the sensor and its wiring (ensure that the emergency plug is
placed in the rear socket):
The sensor resistance should be 1,0 ---1,10 kΩ. The resis-
tance can be measured on pins shown below. If the resistance
is infinite, it should be measured on the sensor pins in order
to clear up possible breaks:
Connector pins to measure the engine speed sensor
resistance:
A1C: 28 and 11.
X2C: 6 and 3
Sensor pins

Changing PTO speed sensor

rear axle sensor on page 351/2.
421
Code Page
351 3
see change of the
, see change of the