Gearbox Speed Sensor B6; Pto Speed Sensor B7 - Valtra 6000 Workshop Manual

33. Agrodata---instrument
1. Sensors
A. Gearbox speed sensor B6
Note! The sensor resistance should be 1,0 ---1,10 kΩ. The
resistance can be measured on the pins shown below. If the
resistance is infinite, it should be measured on the sensor pins
in order to clear up possible breaks:
Pins:
Sensor pins
X34: pins 1 and 2 (---J05132)
X25: pins 1 and 2 (---J05132)
X26: pins 9 and 10 (white connector)
X13: pins 6 and 15 (J05133---)
X1E: pins 1 and 2 (if in use)
B6
Changing the sensor:
Note! Before the gearbox speed sensor can be removed, the
tractor frame must be split between gearbox ---fuel tank.
--- Remove the faulty sensor and clean the threads where the
sensor fits.
--- 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 a test drive and ensure that Agrodata ---unit func-
tions.
--- Fit the plastic tube onto the sensor wire. Connect the wires
to the sensor and protect 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
cable tie.
N.B.: In 50 km/h transmission the sensor locking nut must
be removed and the sensor is locked with Loctite 572. This
must be done since in this transmission, the measuring
gear wheel is smaller and the sensor thread length is
insufficient to fit the lock nut.
Note! If the driving speed display or travelling distance is
clearly faulty, the fault can lie also in the wrong calibration
of the instrument, see page 331/5.
15. 4. 1995
1. 8. 2000
B. PTO speed sensor B7
Engage the PTO and measure the PTO shaft rotation speed
with a separate RPM meter and compare the reading with the
display on the Agrodata ---unit. Rudely said the diplay can be
checked so that you adjust the engine speed until the rev.
counter indicator is at 540 mark, at which time the display sho-
uld show the same value (±100 rpm).
If there is no PTO speed display or it is incorrect, check the
sensor and its wiring (ensure that the emergency plug is
placed in the rear socket):
Note! The sensor resistance should be 1,0 ---1,10 kΩ. The
resistance can be measured on the pins shown below. If the
resistance is infinite, it should be measured on the sensor pins
in order to clear up possible breaks in the loom:
Pins:
Sensor pins
X34: pins 5 and 6 (---J05132)
X25: pins 5 and 6 (---J05132)
X26: pins 21 and 22 (white connector)
X13: pins 19 and 27 (J05133---)
X1E: pins 5 and 6 (if in use)
Changing the sensor:
--- Remove the faulty sensor and clean the threads where the
sensor fits.
--- Find with a dial gauge the shortest distance between the
sensor and the impulse disc through the sensor hole.
--- Apply Loctite 572 onto the threads and screw the sensor
by hand until the sensor touches the impulse disc (do not
screw too hard because the disc can spring). Unscrew the
sensor then 1/4 of a turn.
--- Lock the sensor with a locking nut and connect wires
--- Ensure that the display shows the PTO speed.
--- Fit a plastic tube onto the sensor leads. Connect the wires
to the sensor and protect 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
cable tie.
334
Model Code
6000-- 8950 331
B7
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