Belarus 3522.5, Operator'S Manual

Page: 321 / 340

3522.5-0000010 OM
322
Continuation of the Table 7.3
а
Error
code Cause of suspicion and malfunction
nature
Test and elimination method
25 “Floating” position can not be en-
gaged during the set period of time
due to mechanical blocking of the
central spool or the control valve
failure. Meanwhile the central spool
of the distribution valve section
spontaneously goes back to the
“neutral” position. The section op-
eration controlled by the joystick or
HLL POU becomes blocked. The
error code is indicated only in the
damaged section.
Check the voltage level (board
network voltage), measure the coil
resistance [(5±1) Ohm at (20±3)
0
С
] of
the actuating electromagnet socket.
Rinse the sintered metal coarse filter,
located under the plug (Figure 7.3.4).
If the specified parameters do not
comply with standard requirements,
eliminate the failure in the electric cir-
cuit. In case the electric circuit failure
perform the following actions:
- rinse the sintered metal coarse fil-
ter;
- replace the fine filter;
- in case of deadlock use manual
control to shift the central spool with
effort not exceeding 450 N. If this ac-
tions require more efforts that the
central spool shall be rinsed. When
determination of the position of the
central spool is carried out, it is for-
bidden to rotate the central spool
around its axis
26 Switching on of the central spool
into position “lowering” or “floating”
was caused by the control valve
blocking in the “lowering” or “float-
ing” position. If the control valve
blocking in the position correspond-
ing to oil supply for shifting of the
central spool into the “lift” position
occurs, than after the tractor is
started the central spool is shifted
to the “lift” position
The code disappears after shifting
of the central spool into the “neutral”
position. It is necessary to perform
the following actions:
- use manual control to shift the
central spool with effort not exceeding
450 N. If this actions require more ef-
forts that the central spool shall be
rinsed;
- disassemble the cabinet in the
section with electrical equipment.
Withdraw and rinse the control valve
from the section;
When determination of the position
of the central spool is carried out, it is
forbidden to rotate it around its axis
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