2122.6-0000010 OM
235
Table 6.13.1 continued
Failure
code
Possible cause and malfunction char-
acter
Method of check and elimination
22
High power supply (above 18V).
The central spool of the distributor
section will return to the neutral posi-
tion by itself. Operation by joystick or
OPU of HLL is not possible. When
there is a control signal and voltage
above 18V code “17” will be indicated
untill operation stops.
Check power supply voltage in the
dashboards and in contacts 1, 4 (figure
6.13.5) of the connector for the distribu-
tor section. In case of increased volt-
age check operation of the alternator.
23
Clogging of fine filter of coarse met-
al-ceramic filter or missing of voltage in
the actuating electromagnet of the re-
duction valve. Hereby when operated
with the joystick or OPU of HLL the
central spool will not move or moves
slowly and not to a complete stroke.
The code will be indicated in all sec-
tions where the control signal is deliv-
ered. When the signal is missing or
goes out code indication disappears.
Check voltage in the connector of
the actuating electromagnet (figure
6.13.3) (it shall be on-board circuit volt-
age), measure resistance of the coil (it
shall be 4 to 6 Ohm at the ambient
temperature of 15
°
С
to 35
°
С
). If volt-
age and coil resistance is ok, wash the
coarse metal-ceramic filter located un-
der blind plug 1 (figure 6.13.4), if it is
not possible to wash the coarse filter
then replace it. Replace the fine filter
located under cover 1 (figure 6.13.2),
wash the reduction valve.
25
The “floating” position will not turn
on in the certain period of time due to
mechanical jamming of the central
spool or failure of the control valve.
Hereby the central spool of the dis-
tributor section will return to the neu-
tral position by itself. Operation of the
section by joystick or OPU of HLL is
blocked. The code is only indicated in
the faulty section.
Check voltage in the connector of
the actuating electromagnet (figure
6.13.3) (it shall be on-board circuit volt-
age), measure resistance of the coil (it
shall be 4 to 6 Ohm at the ambient
temperature of 15
°
С
to 35
°
С
). If the
above listed parameters don’t corre-
spond to the rate eliminate the failure in
the electrical circuit. If the electrical cir-
cuit has no failures proceed as follow:
-
wash the coarse metal-ceramic
filter, if it is not possible to wash the
filter, then replace it;
-
replace the fine filter;
-
in case of sticking move the cen-
tral spool by means of manual control
applying force of no more than 450N. If
it requires a bigger force then the cen-
tral spool needs to be washed. When
determining the position of the central
spool it is forbidden to rotate it about
the axis.
https://tractormanualz.com/
