2122.6-0000010 OM
210
Table 6.3.1 finished
Failure,
external manifestation, cause
Troubleshooting
Rear axle DL or FDA drive is constantly engaged in an automated mode (fail to disen-
gage during guide wheels turn)
Breakage in the supply circuit “plus”
of left or, correspondingly, right sen-
sor for turning angle
Check the sensor supply circuit “plus” according to
the electric circuit diagram
One of drives (RL DL, FDA, FPTO, RPTO) or gear will not engage or gets disen-
gaged if was previously engaged
Electrical fault in the circuit of the
electromagnet of the distributor for
one of the drives or a gear – initial-
ized by a single-time flashing of the
respective indicating lamp of actu-
ated condition (triggered by the pres-
sure sensor at the output of the dis-
tributor)
- check working order of the electrical circuit from
CECS to the electromagnet of the respective distribu-
tor according to the wiring diagram. If there is a fault it
shall be eliminated.
- check coil resistance of the electromagnet of the re-
spective distributor – it shall make 4 to 6 Ohm. If coil
resistance of the electromagnet is close to 0 Ohm,
then replace the electromagnet.
Break in the circuit to the electro-
magnet of the distributor for one of
the drives or a gear – initialized by a
two-time flashing of the respective
indicating lamp of actuated condition
(triggered by the pressure sensor at
the output of the distributor)
- check working order of the electrical circuit from
CECS to the electromagnet of the respective distribu-
tor according to the wiring diagram. If there is a fault it
shall be eliminated.
- check coil resistance of the electromagnet of the
respective distributor – it shall make 4 to 6 Ohm. If
coil resistance of the electromagnet is close to infin-
ity, then replace the electromagnet.
One of drives (RL DL, FDA, FPTO, RPTO) or gear can be engaged for a short
time (1 to 6 sec.) or gets disengaged if was previously engaged
If pressure in the transmission hydraulics is below
standard (pressure in the transmission hydraulics
shall make 1.1 to 1.2 MPa) it is required to follow in-
structions of subsection 6.9 “Possible failures of the
transmission hydraulic system and instructions for
their troubleshooting”
Malfunction of the pressure sensor
installed at the output of the distribu-
tor of any of the drives or a gear –
initialized by a three-time flashing of
the respective indicating lamp of ac-
tuated condition
If pressure in the transmission hydraulics is normal it
is required to dismount the wire bundle block from the
pressure sensor and having installed a bridge into the
block simulate triggering of the sensor:
-
if failure code indication remains on (three-time
flashing), then it is necessary to check pressure sen-
sor circuit according to the wiring diagram;
-
if failure code indication disappeared, then it is
necessary to replace the pressure sensor itself for a
non-faulty one.
It is impossible to change gear or disengage one of the drives (rear axle DL, FDA,
FPTO, RPTO)
Sticking of a distributor valve of any of
the drives or a gear is initialized by a
four-time flashing of the respective in-
dicating lamp of actuated condition
Eliminate by way of disassembly and washing of the
distributor valve in diesel fuel.
As you engage gearbox braking engine fails
Clutch will not disengage
Adjust clutch disengaging drive
Clutch disengaging sensor is not
adjusted
Adjust clutch disengaging sensor acc. to subsection
5.4.2.12.2.4
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