Front Driving Axle Drive Control On Tractors "Belarus-82.1/820 - Belarus 80.1 Operation Manual

2.14 Front driving axle drive control on tractors "BELARUS-82.1/820"

FDA drive control handle 1 (figure 2.14.1) has three fixed positions:
- "FDA off"– lower most (front) position. This position is used during hauling opera-
tions on hard-surface roads;
- "FDA automatically engages and disengages" – middle position. In this mode au-
tomatic FDA engagement and disengagement occurs with the help of the free travel clutch
depending on the rear wheels slipping. Use when performing various field operations;
- "FDA positively engaged" – upper most (rear) position. Use this mode only in cas-
es of constant slipping of rear wheels and during reverse movement, when the FDA en-
gagement is required.
Engage the FDA drive in the positions "FDA automatically engages and disengages"
and "FDA positively engaged" when tractor gets going.
Transfer the FDA drive from positions "FDA automatically engages and disengages"
and "FDA positively activated" to the position "FDA off" at the moment when tractor gets
going with the clutch pedal depressed. If disengagement of the FDA drive is hampered, do
not apply force to the control handle and follow these steps:
- depress the clutch pedal;
- shift the gear to move in the direction, opposite to the working one (that is if for-
ward movement gear was engaged, engage reverse gear and vice versa);
- smoothly release the clutch pedal and at the moment of starting shift the control
handle to the position "FDA off".
1 – handle to control FDA drive; 2 – FDA drive control diagram.
ATTENTION: WHEN OPERATING ON HARD-SURFACE ROADS IT IS NECES-
SARY TO DISENGAGE THE FDA DRIVE TO AVOID INCREASED WEAR OF FRONT
WHEEL TYRES!
TRACTOR OPERATION WITH FDA DRIVE ENGAGED AT A TRAVEL SPEED
HIGHER THAN 13 KM/H IS FORBIDDEN.
ATTENTION: VIOLATION OF THE RULES FOR THE USE OF THE FDA DRIVE
CONTROL MODES CAN LEAD TO FDA AND TRANSMISSION PARTS BREAKDOWN!
Figure 2.14.1 – FDA drive control
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80-0000010B OM