BELARUS-
1523/1523В
/1523.3
/1523В.3
Troubleshooting
229
Trouble, symptoms
Remedy
slide edges.
distributor and set the position handle to the
foremost position. The retaining ring of the
slide shall rest against the regulator-
distributor body. Move the position handle to
the rearmost position. The slide shall move
upwards by at least 7 mm. If the displace-
ment will be less, dismantle the regulator-
distributor and remove the foreign particles
seized between the edges of the slide and
body.
The lift linkage with load fails to move upwards or its movement is slowed down:
The fault appears as oil in the hydraulic sys-
tem is warmed up: the pump is faulty.
Check the pump capacity. Should the pump
efficiency be below 0.7, replace the pump.
The fault appears at any oil temperature:
the discharge valve is clogged.
Dismantle the regulator-distributor, remove
the bypass valve from it and wash the valve
and the body in diesel fuel.
The lift linkage with load moves upwards slowly; after stopping the engine, its
spontaneous lowering is visually noticeable; the position corrections are frequent,
the pressure can be suspended:
Destruction of the rubber seals of the regu-
lator-distributor.
Remove the regulator-distributor and re-
place the rubber seals by the new ones.
The pump is not unloaded over the whole range of travel of the lift linkage with
load when using the position method of adjustment on reaching the specified posi-
tion be the lift linkage:
In case of insignificant movements of the
position handle towards the drop position,
the pump is unloaded for short time; after
stopping the engine, the leak-tightness is
normal
Jamming of the accelerator valve or loss of
its leak-tightness.
Dismantle the regulator-distributor; remove,
disassemble and wash the bypass valve.
If necessary, fit the valve ball to its seat.
When moving the position handle towards the drop position, the pump is not
unloaded; after stopping the engine, the leak-tightness is normal:
Loss of leak-tightness of the pressure-
setting valve.
Screw out the tapered plug on the top sur-
face of the regulator, remove the spring, fit
the valve ball to its seat and refit the parts.
The lift linkage with load moves spontaneously downwards to a small distance on
reaching the position set by means of the position handle (“sagging” of the lift
linkage):
Loss of leak-tightness of the anti-sagging
valve.
Remove the regulator-distributor, screw out
the plug of the anti-sagging valve, remove
the spring, fit the ball to its seat and refit the
parts.
The position of the position handle at the digits “1” and “9” does not correspond to
the transport and bottom positions of the lift linkage, respectively:
Maladjustment of the position rope in the
drive.
Align the respective positions of the handle
and lift linkage by rotating the nuts fastening
the shell of the cable to the bracket in the
Summary of Contents for 1523
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