subject to conditions of traffic on public roads listed in Chapter IV. Towing axles differ only in the number of weights used on
wheels (see Chapter VIII LIST OF COMPONENTS).
Hinge Z-1: this suspension is mounted on the gearbox and serves to couple semi-trailer, to connect weight carrier with two
5kg weights for set balancing at ploughing, and to connect share carrier with the blade when using rotary cultivators AKY-357
or AKY-358.
Suspension device BZN-004: consists of a suspension with weight carrier, weight of 33kg, weight carrier and two weights of
5kg. This suspension device serves to connect all VARI-System working implements. The weights are to load the machine in
order to enhance pulling force on axle and to balance the machine at working with all adapters for passive soil cultivation.
III. TECHNICAL DATA
Gearbox Model T-20SA Unit Value
Number of gears - 2 + 1R
Output shaft rotations Gear 1 s
-1
1.54
Output shaft rotations Gear 2 s
-1
2.37
Output shaft rotations Reverse s
-1
0.63
(holds for engine rotations 4800 min
-1
)
Wheel track mm 480, 610
Tire size inch 5.00“-12“
Tire pressure kPa 120
Weight
- gearbox kg 18
- towing axle TN-03 kg 82
- towing axle TN-06 kg 58
- complete hinge Z-1 kg 2.5
- suspension device BZN-004 kg 55.7
Power supply kW 3.5
Gearbox oil filling litres 1.16
Gearbox oil grade API GL-4, GL-5
SAE 90, 80 W-90
TECHNICAL DESCRIPTION OF THE GROUPS:
Gearbox Model T-20 A: Gearbox consists of two castings in which toothed wheels of gears are mounted. In the lower case of
cast iron, there is worm shaft and worm wheel mounted on antifriction bearings. Hexagonals on worm wheel shaft ends serve
to mount towing axle or rotary cultivators. The upper aluminium case into which the worm shaft is led out is the gearbox
proper. This case contains a layshaft with the toothed gears of Gear 1 and 2, and a toothed gear sliding along the worm shaft.
This gear is being displaced by means of the gearshift lever-controlled shift gate located on the left side of the gearbox.
Arrestment of gears is ensured by a spring-mounted ball which falls into a recess in the shift gate. Teethed reverse gear is
mounted on needle bearings on a fixed pivot. Clutch disk is mounted on the end of the layshift. In the upper part of case body,
there is a flange into which the engine unit is mounted, which is to be secured on the case by two quick-operating clips; pivot
on the console of handlebars is to be secured by tightening the crank. The gearbox is provided with oil drain and pour-in neck.
Towing axle Models TN-03,TN-06: Axle consists of two wheels with overrunning hub, spacers, axle pivots for both wheel
track widths 480 a 610 mm, washer, locking nut and split pin. Wheel consists of a tire with air-tube 5.00"-12", mounted on a
cast iron disk wheel freely placed on the hub. The hub has incisions on the front part, into which a finger falls which is spring-
mounted in the disk wheel. The finger is compressed into engagement by a spring. A pull rod is hooked onto finger pin, which
falls into slot in the disk wheel lug, determining the finger position. This design solution partly substitutes for the missing
differential, providing at the same time for an easier machine maneouvrability. Finger positions are described in Chapter V.
Wheel track can be altered by means of spacers which are to be mounted on the gearbox output shaft hexagonals. The axle is
connected to the gearbox by means of axle journals, washer and lock nut which is to be secured with a split pin.
Hinge Model Z-1: is welded of two steel plates with lugs between them forming a fork for the semi-trailer shaft. Part of the
hinge is also a pin with the safety split pin. The hinge is screwed onto the gearbox by two bolts with nuts and spring washers.
Suspension device Model BZN-004: consists of the suspension with weight carrier and the weight carrier. The suspension
with the weight carrier is welded of two flat arms and fork to couple extension body. The open end of the carrier serves to slide
in a 33 kg weight. The weight carrier consists of a steel rod onto which a tube is welded. The carrier is to be coupled into
hinge Z-1 by means of a pin. The weights of 5 kg are to be secured on the rod by a tightening crank.