Rear Axle Differential Lock Control - Belarus 3522.5 Operator's Manual

If there is a necessity of FDAD positive engagement for short time, irrespective of
tractor speed and front wheels turning angle, it is required to push button 25 and hold it
pressed. FDAD remains engaged during holding the button 25 pressed. Simultaneously
the annunciators 10 and 26 go off. On releasing the button 25 the FDAD returns to its ini-
tial (disengaged) state and the annunciators 10, 26 go out.
To transfer from the automatic mode of FDAD engagement to the positive mode it is
necessary to press the button 25 at once and hold it pressed.
ATTENTION: USE ONLY POSITIVE ENGAGEMENT OF FDA WHEN OPERATING
THE TRACTOR UNDER BAD TYRE GRIPPING CONDITONS WHEN REAR WHEELS
SKID INCLUDING TRACTOR TURNING, TO INSURE SMOOTH ENGAGEMENT OF
FDA, FOR THIS DO THE FOLLOWING:
o STOP THE TRACTOR, HAVING DEPRESSED THE CLUTCH PEDAL;
o ENGAGE THE FDA IN THE MODE "FDA DRIVE ENGAGED POSITIVELY",
HOLDING THE BUTTON 25 IN DEPRESSED CONDITION;
o SMOOTHLY RELEASE THE CLUTCH PEDAL.
ATTENTION: AUTOMATIC ENGAGEMENT OF FDA DRIVE, IRRESPECTIVE OF
THE SET MODE (INCLUDING THE MODE "FDAD DISENGAGED"), TAKES PLACE
WHEN PRESSING THE INTERCONNECTED BRAKE PEDALS!
ATTENTION: WHEN OPERATING ON ROADS WITH HARD SURFACE IT IS
NECESSARY TO DISENGAGE THE FDA DRIVE IN ORDER TO PREVENET IN-
CREASED WEAR OF FRONT WHEEL TYRES!
ATTENTION: VIOLATION OF RULES FOR USING FDA DRIVE OPERATION
MODES MAY RESULT IN BREAKDOWN OF FDA TWINNED PIVOTS AND OTHER
PARTS OF TRANSMISSION!
IT IS FORBIDDEN TO OPERATE THE TRACTOR WITH FDA DRIVE ENGAGED
WHEN THE SPEED OF MOVEMENT IS ABOVE 13 KM/H!
ATTENTION: IN CASE WIRES IN CIRCUIT OF FDA DRIVE ELECTROMAGNET
CONTROL ARE BROKEN, IRRESPECTIVE OF THE SET MODE (INCLUDING THE
MODE "FDAD DISENGAGED"), AUTOMATIC ENGAGEMENT OF THE FRONT DRIVING
AXLE TAKES PLACE!

2.13.5.6 Rear axle differential lock control

Rear axle differential lock (DL) is controlled with the buttons 13 and 22. (figure
2.13.4). Indication of rear axle DL operation is performed by annunciators 12, 21, 23.
In initial condition, when the operator shifts the starter and instrument switch into position
""I – instruments are on", rear axle DL disengaged condition is set by default.
Use the mode "Rear axle DL disengaged" on transport when moving on roads with
hard surface with speed above 13 km/h in order to prevent increased wear of rear wheel
tyres and rear axle differential.
Pressing button 13 "AUTO" with guide wheels position corresponding to linear
movement, engages the rear axle DL in automatic mode. Simultaneously annunciators 12
and 21 go off.
The real axle DL is disengaged automatically when the guide wheels turn to the an-
gle above 13° or when travel speed is above 16 km/h, and also when pressing any or both
brake pedals. As the travel speed goes below 13 km/h the rear axle DL shall automatically
engage. The annunciator of rear axle DL automatic mode engagement 12 will burn con-
tinuously, until this mode is disengaged, and the annunciator of the rear axle DL engaged
state 21 will burn only during RADL operation.
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