TROUBLE, EXTERNAL MANIFESTATION
The governor handle fails to return by its own from the “lifting” position to the “transport neutral”
one
Jamming in the joints of the control handle with the
power governor
Eliminate the jamming, clean the surfaces of the ar-
ticulated joints from the corrosion traces; if neces-
sary, apply a layer of lubricant.
The latch spring bolt on the control handle is over-
tightened
Adjust the latch spring tension on the control han-
dle.
Maladjustment of the governor control rod.
Adjust the rod length (see section “Adjustments”).
B. With hydraulic lift
The unloaded mounted attachment is not lifted; when setting any handles of the distributor to the
“lifting” or “lowering” position, no specific sound emitted by the pump under load
Clogging of the safety valve of the tractor distribu-
tor.
Disassemble and wash the safety valve. Adjust the
pressure maintained by the safety valve.
The unloaded mounted attachment is not lifted; when setting any handles of the distributor to the
“lifting” or “lowering” position, a specific sound emitted by the pump under load is heard. After
stopping the engine and moving the position handle to the foremost position and then to the rear
position and starting the engine, the mounted attachment is lifted (the power handle shall be in
the foremost position).
Clogging the orifice in the overload valve.
Remove the regulator-distributor from the tractor,
remove a bypass valve from it, wash the valve and
clean off the valve orifice.
The unloaded mounted attachment is not lifted; when setting any handles of the distributor to the
“lifting” or “lowering” position, a specific sound emitted by the pump under load is heard. After
stopping the engine and moving the position handle to the foremost position and then to the rear
position and starting the engine, the mounted attachment is not lifted (the power handle shall be
in the foremost position).
Ingress of foreign particles under the spool valve.
Remove the cover from the regulator-distributor, set
the position handle to the foremost position. The
spool valve lock ring shall rest against the body of
the regulator-distributor. Move the position handle
to the rear position. The spool valve shall move up-
wards to the distance of at least 7 mm. If not so,
remove the regulator-distributor, clean it from for-
eign particles jammed between the edges of the
spool valve and body.
The loaded mounted attachment is not lifted or is lifted too slowly
The fault becomes apparent as oil in the hydraulic
system is warmed up – the pump is faulty.
Check the capacity of the pump. If the pump effi-
ciency is below 0.7, replace the pump.
The fault becomes apparent at any oil temperature
– clogging of the overload valve.
Remove the regulator-distributor, take the bypass
valve away and wash it and the regulator-distributor
in diesel fuel.
The loaded mounted attachment is lifted slowly; after stopping the engine, the spontaneous
mounted attachment lowering is noticeable by eye, the position corrections are frequent, the
pressure “hanging-up” is possible
Destruction of the rubber seals of the regulator-
distributor.
Remove the regulator-distributor and replace rubber
seals by new ones.
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