Peterburgsky Traktorny Zavod

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Industrial tractors

Kirovets K-703MA and K-703M

Industrial tractors (all-wheel drive tractor units) "Kirovets K-703MA" and "K-703M" (250 and 350 hp correspondingly). Operating weight is up to 18.3 tones. Auxiliary equipment: dozer blade, fifth wheel, farming hitch, tow hitch

Distinctive features of these units embrace cornering ability, good cross-country ability and high pull. Tractive units of K-703 type are possible to ford up to 1 m, move out of any rut and move in off-road conditions, shifting the heavy loads. Such possibilities are determined by two factors – an articulated frame and tractor gerabox.     

Depending on the current tasks, the tractive units of K-703 type may have:
 
1. Wheel arrangement by 4Х4 and 6Х6 type;
2. Fifth wheel for transporting of machinery or other loads on the two-wheel trailer;
3. Three-link hitch or tow hitch (TH) for transporting of all possible trailers; 
4. Dozer blade for “laying” the road or additional transport loading when bulldozing. 
 
K-703 model, equipped with TH or farming hitch, may be used with different two-wheel trailers, if the special vehicle dolly is applied.    
Plant produces the high-duty snow-removing machines, welding sets and tower transporters on the basis of K-703 unit.   
Warranty period – 18 months or 2 000 operating hours.
 

MAIN CHARACTERISTICS

К-703МА

К-703М

Force exerted rating, kN (t) 

50(5)

Maximal pulling power, kW (hp)

111(151)

156(212)

Weight, kg (max)

Dry (constructive)

14160

14400

Operating

15160

15400

Endwise weight distribution, %

Front axle

58+2

Back axle

42+2

Road clearance, mm

Under the bevel gear of driving axle

550

Under the lead-lag axis

440

Wheel track, mm

2255+40

Wheel base, mm

3750+50

Minimum turning circle (along the axis of outside wheel track if the back axle is off), m

7,7+0,5

Maximum fordable depth, m

1,0

Dimensions, mm:

Length (with lifted hitch)

7250+50

Width

2975+50

Height

3735+40

Maximum breaking distance at a speed of 8.3 m/s (30km/h), m

13,0

Critical angle of transverse statical stability, radian (degrees)

0,61(35)

Critical angles, radian (degrees):

Rise (come-down)

0,31(18)

0,35(20)

Roll

0,21(12)

0,35(20)

Rise with trailer

0,21(12)

0,21(12)

Fuel capacity, l

800

ENGINE

YMZ-238ND4

8481.10

Nominal power, kW (hp)

184(250)

257 (350)

Operating power

168(229)

235(320)

Rated speed, min-1

1900

1900

Maximum torque, Nwm (kgf.m)

1108(113)

1570(160)

Engine start heating

PJD-30

PJD-30

-

GEARBOX

Gearbox – manual, shifting of four gears within each of four regimes and no power loss (16 speeds of forward and 8 speeds of reverse running)

Running speed at rated frequency of engine speed and no slipping, m/s (km/h)

Forward running– 1,3(4,72)...9,4(33,8)
Reverse running - 1,6((5,86)...6,7(24,0)

Running speed at force exerted rating of 5t, m/s (km/h)

2,1 (7,58)

Engine and weight axles are driving, weight axle is selectable 

Inter-wheel differential is a double-sided freewheeling gear clutch

RUNNING GEAR

Axle suspension

Rigid

Industrial tires

29,5/75R25

Rims

dismountable

Service brake

Dry wedge-type brake with air drive

Parking brake

Stop-type disk brake with air-spring drive

CABIN TYPE AND ITS EQUIPMENT

Two-place cabin from solid metal with thermal, vibration and noise insulation. It has the built-in safety cage protecting the operator from rollover and objects falling.

Operator’s seat is a spring saddle.

Two defroster vents for blowing of front and back windows; windows are tinted.

Two cabin heaters.     

EQUIPMENT SYSTEMS OF K-703 UNIT FITTED WITH FW (model name – K-703MA-12-02-FW)

This modification is appropriate only for the tractive unit of K-703 type that has the power of 250 hp

Fifth wheel (FW-50-11; GOST ) is fixedly attached to the truck (rear) frame.

Maximal FW weight – t.

The height of FW upper surface above the road level – mm.

EQUIPMENT SYSTEMS OF K-703 UNIT FITTED WITH FIFTH WHEEL (model name – K-703MA(M)-12)

Remote-cylinder system enables controlling of tractor hitch and actuating elements of mounted, semi-mounted and trailed mechanisms and implements.

Hydraulic pump – НШ-50А-4Л, pumping capacity – 70 l/min

Valve actuator – P80-3/1-222

Fluid pressure rating in the hydraulic system – MPa (kgf/sq.cm)

Draft hitch is a three-link mechanism of the standard hitch used with the farming implement, machinery and units, which are designed for mounting with tractors of 5t drawbar category. 

The package includes the hydraulic pick-up hitch that is attached to the draft link and designed for tractors with trailers and two-wheel trailers, as well as for towing of different machinery and equipment.

Hook mouth diameter – mm

Distance from hook pin to the ground surface (for transport) – not less than mm 

EQUIPMENT SYSTEMS OF K-703 UNIT FITTED WITH TH (model name – K-703MA(M)-12-01-TH)

Tow hitch, fixedly attached to the truck (rear) frame, includes the draft hook that is equipped with a kit of Belleville springs. 

Hook mouth diameter – mm

Distance from hook pin to the ground surface – mm

1100

EQUIPMENT SYSTEMS OF K-703 UNIT FITTED WITH DOZER BLADE (model names – K-703MA-12-03 / -12-03.1 or K-703M-12-03 / -12-03.1 and K-703MA-12-04)

3360

K-703MA-12-03 / -12-03.1 or K-703M-12-03 / -12-03. Special machine of K-703MA-12-03 / -12-03.1 or K-703M-12-03 / -12-03.1 types is produced on the basis of multipurpose tractor unit of K-703MA (250 hp) or K-703M (350 hp) types, that is equipped with the hydraulic pick-up hook (attached to the standard farming hitch) and dozer blade (mounted on the engine frame). “12-03” modification differs from “12-03.1” modification by the capacity of fuel reservoir (320 liters or 800 liters).    

520

K-703MA-12-04. Special machine of K-703MA-12-04 type is produced on the basis of multipurpose tractor unit of K-703MA type, which is equipped with the tow hitch (TH) attached to the weight frame and dozer blade mounted on the engine frame.

1300

Blade height, mm

27,0

Blade width, mm

11,0

Blade cross-axis tilt

Mechanical drive (blade is in the grading position for K-703MA-12-04; hydraulic powered control is from the cabin: valve actuator of the blade pilot hydraulic system – P-80-3/1-222; power pressure of the hydraulic system, MPa (kgf/sq.cm))

ADD-ONS (optionally)

Starting preheater for K-703M-12 unit

Conditioner produced by Avgust Company

Individual cabin heater made by Webasto Company

Tilt pilot hydraulic system of Danfoss Company