Chetra T15

GEARBOX

A planetary-type gearbox with oil operating, high capacity torque transmitting clutches 415 mm in diameter provides three forward gears and three reverse ones with gear shifting under load. The modulating system allows changing gears smoothly under load. Gear and travel direction change is performed by one lever. As per design the gearbox is connected with matching reducing gear and main drive forming a single power unit mounted on rear axle bore. A three-element one-stage torque converter with efficient diameter of 410 mm, maximum transformation ratio Ко = 2.9 with pumps drive reduction gear is connected with the gearbox by means of spline coupling and mounted on the front wall of the rear axle. The torque converter is connected with the engine-mounted elastic clutch through drive line.

Gear	Forward, km/h	Reverse km/h
1	3,9	5,1
2	6,9	9,0
3	11,1	14,2

FINAL DRIVE

Final drive is of two-stages, the 1 -st one having external gearing pinions and the second one of planetary "k+1" type (with the stopped crown gear). The sprocket has a 5-segment design, with the segments being bolt-on for easy replacement in field conditions.

UNDERCARRIAGE

Suspension: A three-point semi-rigid suspension with displaced oscillating axle of bogies provides higher traction characteristics, reduction of impact loads on undercarriage, improvement of working conditions.
Track rollers, support rollers and idlers feature a life-time lubrication and self-adjusting "duo-cone" seal packages.
Number of track rollers (each side) —7.
Number of support rollers (each side) —2.
Idler—microcushioned

Track chains: Assembled with single-grouser track shoes and a seal package for retaining a fluid lubricant in the hinge.
Track tension is easily adjusted with grease gun.
Link pitch —215.9 mm
Number of shoes (each side) —40
Grouser height —70 mm.
Shoe width —560 mm
Ground contact area —3.26 m²
Ground pressure —0.87 kgf/cm²

RIPPER EQUIPMENT

Depending on the ripper working conditions, one, two or three shanks may be mounted which will provide high productivity.

Ripper type	Number of shanks	Weight, kg	Lift above ground, max, mm	Digging depth, max, mm	Breakout force, max, T	Penetration lorce, max, T
Non-adiustable, multi-shank	1	2268	738*	830*	21,0	9,6
Non-adiustable, multi-shank	3	2475	555*	700*	21,2	9,6

* - with grouses deepened

HYDRAULIC SYSTEM

Remote-cylinder hydraulic system:

• Two-section NSh-100-50 gear pump of 235 L/min capacity at 1,750 rpm
• Four-section control valve consisting of one valve section and three spool sections
• Maximum relief valve setting —20 MPa (200 kgf/cm²)
• Hydraulic tank capacity (welded tank suitable for mechanical treatment of inner surfaces)—130 L

Spnol sections	Positions of control valve spools	Number of cylinders	Cylinder bore, mm
Blade lift	Raise, neutral (hold), lower, float	2	110x1200
Blade tilt	Right, neutral, left	1	160x310
Ripper lift	Raise, neutral, lower	2	160x530

DOZER EQUIPMENT

Large capacity of U-blade provides increased productivity, application of diagonal tie-rod for transferring blade side forces to frame left side rail providing maximum blade approaching to the tractor front part and maximum force on blade knife

Blade	Blade length x height, В x H, mm x mm	Blade capacity, m2	Lift above ground, mm	Blade digging depth, mm	Tilt adjustment, max, degrees	Weight kg
U-blads	4180x1650	8,5	1150*	555*	±10*	3345
SU-blade	3820x1520	6,8	1150*	555*	±10*	2805
SU-blade	4050x1490	5,8	1150*	555*	±10"	2980

* - with shipped grousers

WEIGHT

Tractor —23 400 kg. Total weight (standard equipment, full fuel tank, SU-blade, three-shank ripper, operator) —28 020 kg