MTZ K-744R1 User manual

OPERATING INSTRUCTION
744Р-0000010
MTZ-KIROVETS tractors K-744R1, K-744R2
K-744R3, K-744R4
Head Office: 3-1136 Centre St. Ste 124, Thornhill, ON, L4J 3M8, Canada
Warehouse: 2682 Highway 34, Hawkesbury, Ontario. K6A 2R2 Canada
Tel: 1-855-2GO-4MTZ (1-855-246-4689) Fax: [phone] E-mail: [e-mail] Web: www.mtzequipment.com

MTZ-KIROVETS tractors K-744R1, K-744R2, K-744R3, K-744R4
2

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
3
Due to continuous activities on the improvement of tractors enhancing their
reliability and improving their operating conditions, insignificant changes can be
introduced into the design, which are not reflected herein.
ABBREVIATIONS
GB –gearbox
PW –paintwork (paint-and-lacquer coating)
PTO –power take-off
ET –electric torch
PDR –pump drive reducer
SPTA –spare parts, tools and accessories
ShM –shift maintenance
M-1 –first maintenance
M-2 –second maintenance
M-3 –third maintenance
M-SS –spring-summer maintenance
M-AW –autumn-winter maintenance
TSS –tractor service station
St –standard
Pr –premium
Edition –October 2015

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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CONTENTS
1 INTRODUCTION......................................................................................................................11
2 GENERAL DESCRIPTION AND TECHNICAL FEATURES...................................................11
2.1 PURPOSE AND SCOPE .........................................................................................................11
2.2 BRIEF DATA ON CONSTRUCTION AND LAYOUT........................................................................15
2.3 MAIN TECHNICAL DATA........................................................................................................29
3 SAFETY REQUIREMENTS.....................................................................................................32
3.1 GENERAL ...........................................................................................................................32
3.2 SAFETY MEASURES DURING DEPRESERVATION,INSTALLATION,TEST OPERATION AND
RUNNING-IN..............................................................................................................................33
3.3 SAFETY MEASURES DURING TRACTOR OPERATION................................................................33
3.4 SAFETY MEASURES DURING MAINTENANCE,TROUBLESHOOTING AND PLACEMENT FOR
STORAGE .................................................................................................................................38
3.5 FIRE SAFETY REQUIREMENTS ..............................................................................................39
4 CONTROLS .............................................................................................................................42
4.1 INSTRUMENT PANEL OF K-744R1 TRACTOR OF STANDARD DESIGN VERSION..........................42
4.2 INSTRUMENT PANEL FOR K-744R2, K-744R3, K-744R4 TRACTORS OF STANDARD
DESIGN VERSION.......................................................................................................................46
4.3 INSTRUMENT PANEL FOR K-744R1 TRACTOR OF THE PREMIUM DESIGN VERSION ...................49
4.4 INSTRUMENT PANEL FOR K-744R2, K-744R3, K-744R4 TRACTORS OF THE PREMIUM
DESIGN VERSION.......................................................................................................................53
4.5 TRACTOR SYSTEM CONTROL................................................................................................58
4.6 SWITCH BLOCK ON THE STEERING COLUMN ..........................................................................61
4.7 SWITCHES ON THE OVERHEAD PANEL IN THE CABIN...............................................................62
4.8 FUSE BLOCKS.....................................................................................................................62
4.9 DRIVER’S SEAT AND ADDITIONAL SEAT..................................................................................63
4.10 LIGHTING AND ALARMS......................................................................................................64
4.11 ENGINE PREPARATION AND START-UP................................................................................65
4.12 ENGINE START-UP AT NEGATIVE TEMPERATURES................................................................66
4.12.1 Safety measures when using the heater ...........................................................67
4.12.2 Heater operation...................................................................................................67
4.13 ENGINE START-UP FROM EXTERNAL POWER SUPPLY...........................................................70
4.14 HVAC SYSTEM OPERATION...............................................................................................71
4.15 TAKING OFF......................................................................................................................72
4.16 GEAR CHANGE..................................................................................................................73
4.17 STOP ...............................................................................................................................73
5 FINAL ASSEMBLY, ADJUSTING AND RUNNING-IN ...........................................................75
5.1 GENERAL ...........................................................................................................................75
5.1.1 Adjustment of lower links .....................................................................................77
5.1.2 Installation of light signaling equipment.............................................................78
5.1.3 Adjustment of head lights.....................................................................................79
5.1.4 Check of window washers ....................................................................................81
5.2 TRACTOR RUNNING-IN.........................................................................................................81
6 OPERATION AND ADJUSTMENT REGULATIONS .............................................................. 83
6.1 PROCEDURE FOR TRACTOR PREPARATION FOR OPERATION...................................................83
6.2 OPERATING RULES AND CONTROL OVER TRACTOR DURING OPERATION..................................85

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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6.3 INSTALLATION AND DISMANTLING OF WHEELS WITH TYRES.....................................................88
6.4 CONNECTION OF THE HYDRAULIC SYSTEM OF AGRICULTURAL MACHINES,IMPLEMENTS
AND VEHICLES TO THE TRACTOR HYDRAULIC SYSTEM..................................................................93
6.5 CONNECTION OF THE HYDRAULIC SYSTEM OF AGRICULTURAL MACHINES,IMPLEMENTS
AND VEHICLES WITH TRACTOR DRAWBARS..................................................................................94
6.6 ORDER OF WORK WITH AGRICULTURAL MACHINES (IMPLEMENTS)AND VEHICLES ....................98
6.6.1 Order of work with mounted and semi-mounted agricultural machines
(implements)....................................................................................................................98
6.6.2 Tractor operation with ploughs............................................................................99
6.6.3 Order of work with vehicles................................................................................100
6.6.4 Work with power taking off (PTO) ......................................................................100
6.7WINTER OPERATION FEATURES .........................................................................................101
6.8 RULES OF TRACTOR TRANSPORTATION,TOWING AND JACKING ............................................103
6.9 GEARBOX PRESSURE CONTROL AND ADJUSTMENT..............................................................105
6.10 DRIVING SHAFT...............................................................................................................106
7 MAINTENANCE.....................................................................................................................113
7.1 TYPES AND FREQUENCY OF MAINTENANCE.........................................................................113
7.2 LIST AND CONTENTS OF WORK BY TYPES OF MAINTENANCE TO BE PERFORMED BY
OPERATOR IN THE PROCESS SEQUENCE...................................................................................114
7.3 TYPES AND LISTS OF MAINTENANCE WORK DURING STORAGE..............................................121
7.4. LUBRICATION TABLE.........................................................................................................123
7.5 CONTENTS AND PROCEDURE OF MAINTENANCE OPERATIONS ..............................................129
7.5.1 Change of oil in the engine.................................................................................129
7.5.2 Adjustment of cylinder valves on 8481 engine.................................................129
7.5.3 Air cleaner maintenance .....................................................................................133
7.5.4 Cooling system maintenance .............................................................................137
7.5.5 Gearbox maintenance .........................................................................................140
7.5.6 Maintenance of driving axles, service brakes...................................................141
7.5.7 Cardan shaft maintenance..................................................................................143
7.5.8 Maintenance of tractor pneumatic system........................................................143
7.5.9 Maintenance of hydraulic systems of mounted equipment and steering
control............................................................................................................................145
7.5.10 Tractor wheel maintenance...............................................................................149
7.5.11 Electrical equipment maintenance...................................................................150
7.6 PROCEDURE FOR EXECUTING WORKS ON THE USE OF SPARE PARTS FROM THE SPTA KIT ....155
8 TOOLS AND ACCESSORIES............................................................................................... 156
9 STORAGE REGULATIONS ..................................................................................................157
9.1 TRACTOR PREPARATION FOR SHORT-TERM AND LONG-TERM STORAGE................................157
10 TROUBLESHOOTING.........................................................................................................159
11 CLAIMING PROCEDURE....................................................................................................165
APPENDIX 1 Diagram of the pneumatic system of K-744R1, K-744R2 tractors ..........167
APPENDIX 1A Diagram of the pneumatic system of K-744R3, K-744R4
tractors................................................................................................................................168
APPENDIX 2 Hydraulic schematic diagram of steering and mounted
implement control systems...............................................................................................169
APPENDIX 3 Kinematic diagram of transmission...........................................................170
APPENDIX 4 Fasteners tightening torque values for main assemblies .......................171

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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APPENDIX 5 List of permissible oils and lubricants ......................................................172
APPENDIX 6 Refill reservoirs............................................................................................173
APPENDIX 7 Log-book for registration of measurements of the internal air
pressure in tyres ................................................................................................................174
APPENDIX 8 Tyre operation record card .........................................................................175
APPENDIX 9 List of electrical equipment elements to the electrical diagram of
the K-744R1 Standard tractor ...........................................................................................176
APPENDIX 9A List of electrical equipment elements to the electrical diagram
of the K-744R1 Premium tractor .......................................................................................183
APPENDIX 9B List of electrical equipment elements to the electrical diagram
of the K-744R2, K-744R3, K-744R4 Standard tractors....................................................190
APPENDIX 9C List of electrical equipment elements to the electrical diagram
of the K-744R2, K-744R3, K-744R4 Premium tractors ....................................................197

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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NOTICE TO OPERATOR!
Before proceeding to work on your tractor please thoroughly read this instruction and
operating manual for the engine installed on your tractor. Strictly follow the operation
and maintenance guidelines.
IT IS PROHIBITED to work on the tractor without fire-extinguishing means. The tractor shall be
equipped with fight-fighting inventory including a fire-extinguisher and a shovel.
IT IS PROHIBITED to work on the tractor with faulty devices.
IT IS PROHIBITED to use parking brake during motion.
IT IS PROHIBITED to tow the tractor by the mounted equipment.
IT IS PROHIBITED to fill the engine cooling system and heating system with water.
IT IS ABSOLUTELY PROHIBITED to switch on the heater without cooling fluid.
IT IS PROHIBITED to openplugs of the tank filler and expansion tank or unscrew the steam-air
valve at the cooling fluid temperature over 70°С.
IT IS PROHIBITED to work on the tractor with faulty steering control, brake system, electrical
lighting and alarm signaling.
IT IS PROHIBITED to use fuses, which are not conformant by the nominal value to the electrical
diagram value.
IT IS PROHIBITED to use coasting during motion down the slope.
IT IS PROHIBITED to be under the tractor when the engine is operating.
IT IS PROHIBITED to work on the tractor at the voltage being above the voltage regulator level
set in accordance with the ambient temperature in order to avoid an explosion of storage
batteries.
IT IS PROHIBITED to operate the engine with unpressurised air feed channels from the air
cleaner to the engine and dust suction from the air cleaner.
IT IS ABSOLUTELY PROHIBITED to work with clogged or ice-covered net of the air intake pipe
cover and without free discharge of gases from the exhaust pipe.

MTZ-KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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REMINDER FOR OPERATOR
Before proceeding to work on the tractor
please thoroughly read the operating
instruction for the tractor paying special
attention to the “Safety requirements”
section.
To ensure safe work on the tractor, at first
get familiarized with the requirements set
forth in this section and further strictly fulfil
them, especially the following:
During turns select the speed providing
safe traffic. IT IS PROHIBITED to make a
sharp turn at the gear being higher than the
first gear of the fourth mode.
When working on slopes exercise caution,
carefulness in tractor driving and meet the
following conditions:
–do not shut off the engine and do not
change gears modes on steep ascents and
descents;
–when overcoming an ascent requiring
actuation of both axles, perform actuation of
the rear axle beforehand;
–during motion down the slope IT IS
PROHIBITED to use coasting;
–it is allowed to work across the slope (the
slope angle shall not exceed 5°) only with
the “slow”position of the mode change lever
and avoid sharp turns and passing
obstacles.
In crossing dams, dikes and bridges, make
sure of the possibility of driving and use only
low gears.
Crossing trenches, hillocks and other
obstacles with mounted implements should
be performed at the right angle at a low gear
avoiding sharp jogs and large rolls of the
tractor.
The motion of tractor train at maximum
speed (27 km/h) is allowed only on roads
with dry hard pavement.
When using the tractor for hauling
operations on snowy, overmoistened and
other roads with a low adhesion coefficient
as well as on slopes, turns, hillsides, during
glaze ice, etc., perform motion at low gears,
do not admit sharp braking and turns.
When moving on slipperyroads it is
recommended to drive the tractor train
“stretched out”–to this end, brake the
hooked-up vehicle first by means of a hand
brake valve and then use the tractor brakes.
During motion IT IS PROHIBITED to use
the parking brake and during hauling
operations use the hand fuel feed lever.
The travelling speed of the tractor with
mounted implementsshall not exceed 15
km/h in motion over an even road and 10
km/h in motion over a bumpy road or off-
road.
In tractor motion with the pressure in tyres
below 1.7 kgf/cm2, the speed shall not
exceed 20 km/h.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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SYMBOLS
The symbols being used on the tractor (instrument panel, fuse block, throw-in lever of lighting
and signaling devices) are given below.
fuel
low beam
oil pressure in engine
fog light
engine cooling fluid temperature
marker lights
air filter
rear window washer
engine oil temperature
frontwindow washer
oil pressure in transmission
transmission deactivation
storage battery
front axle is engaged
deactivated
front and rear axles are engaged
activated
sound signal
fan
smooth regulation by rotation
front wiper/washer
smooth regulation by movement
rear window washer
service lighting
Attention! “Emergency parameter”
neutral gear
engine oil filter
turn signal
air pressure in the primary circuit
scale illumination
air pressure in the secondary
circuit
heater
gearbox oil filter
air conditioner
high beam
cab dome light
direction indicator switching on
“Road-train”sign
alarm signaling
battery master switch
air pressure in trailer system
heating boiler activation
parking brake
stop signal

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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air pressure in front brake circuit
floating position of hydraulic paths for
connection of hydraulic implements
air pressure in rear brake circuit
power take-off shaft engaged
abnormal operation of any system
power take-off shaft disengaged
lifting of mounted implement
slower
lowering of mounted implement
faster
floating position of mounted
implement
electric torch ET
}
service operations of hydraulic
implements
pressure filter of mounted implements
rotating beacon
pressure filter of steering control

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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1 INTRODUCTION
The Operating Instruction for Kirovets K-744R1, K-744R2, K-744R3, K-744R4 tractors is
designed for drivers, mechanics and other persons related to operation of such tractors. The
instruction contains a brief description of the design of tractors and their technical data, main
rules of operation and maintenance. The data on engines of models ЯМЗ-238НД5, 8481.10,
OM457LA (Mercedes), Cummins are set forth in the operating instructions, which are attached
to the tractors and are an integral part of this book.
Before proceeding to tractor operation, it is necessary to study its construction and layout and
operating rules. Long-term and reliable operation of Kirovets tractors is ensured provided proper
operation and timely execution of maintenance.
2 GENERAL DESCRIPTION AND TECHNICAL FEATURES
2.1 Purpose and scope
K-744R1, K-744R2, K-744R3, K-744R4 tractors for general purposes serve for the execution of
various agricultural operations with mounted, semi-mounted and trailing machines and
implements, in combination with which it is possible to perform ploughing, reclamation,
harrowing, sowing, scuffing, disk harrowing, deep ploughing, tilting the soil without or before
ploughing, snow capture and other kinds of work. In addition, the tractors can effectively be
used in transport operations performed on field and ground roads as well as on roads with hard
pavement. The tractors are designed for broad use in most climatic areas.
The description of construction, installation and rules of operation of the above-mentioned
equipment are set forth in the instructions to be attached to each type of equipment.
Tractor hooking-up with agricultural machines or implements and vehicles, their operation shall
be performed according to the instructions issued by the manufacturers of such machines.
List of implements approved for use with K-744 tractors, series “R" Table 1
Make
Description
Quantity of
machines in
the hookup
Method of connection
ПВР-3,5
Attachment to 7–9-furrow ploughs for soil
compaction
1
---
ОП-12
Implement for pre-sowing preparation of soil
1
Hitch iron
ПТК-9-35 (40)
Plough 9-furrow
1
Hitch iron
ПНЛ-8-40
Plough 8-furrow
1
Implement mechanism
ПРК-8-4
Plough 8-furrow
1
The same
ПГП-7-40
Plough 7-furrow
1
-- “ --
ПН-8-35
Plough 8-furrow mounted
1
-- “ --
ПУН-8-40
Plough 8-furrow, multifunctional, mounted
1
-- “ --
ПРУН-8-45
Plough-ripper 8-furrow, multifunctional, mounted
1
Implement mechanism
ПРК-8-40
Plough-ripper 8-furrow, combined
1
The same
ПЧ-4,5
Plough chisel type
1
-- “ --

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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Make
Description
Quantity of
machines in
the hookup
Method of connection
ПД-4-35
Plough tier-type
1
-- “ --
ППН-4-40
Plough, deep ploughing type
1
-- “ --
ПТН-3-40/40А
Plough tier-type
1
-- “ --
ПНИ-8-40
Plough with adjustable width of catch
1
-- “ --
ОПТ-3-5
Implement for tilting the soil without or before
ploughing
1
-- “ --
---
Plough of Paraplough type
1
-- “ --
ПБН-6-50
Plough for reclaiming cultivated bogs
1
-- “ --
РВК-7,2
Combined broad-catching hookup for pre-sowing
soil preparation
1
-- “ --
АКП-5
Combined hookup for main preparation of soil for
winter crops
1
-- “ --
МСП-2
Machine for mixing carbonate and solonetz
horizons
1
-- “ --
АЛС-2,5
Meadow hookup for solonetz soils
1
-- “ --
ФП-4,2
Mill for pastures
1
-- “ --
РС-2,9
Ripper
1
-- “ --
ПГ-3-5
Subsurface plough
1
-- “ --
ГУН-4
Subsurface plough –fertiliser distributor
1
-- “ --
МИК-1.4
Stone extracting machine
1
-- “ --
ДЭ-227
Snow-breaker of mill type
1
-- “ --
ВНК-11
Pushing drag harrow
1
-- “ --
ПК-10
Grain-harvesting engineless combine
1
-- “ --
КПШ-11
Subsurface cultivator
1
-- “ --
КТС-10-02
Heavy sectioned cultivator
1
-- “ --
КЛШ-10/15
Rod-type cultivator
1
-- “ --
СВШ-10
Snow ridger
1
-- “ --
СВУ-2,6А
Snow ridger
3
Coupler СП - 16/16A
КПС-4
Cultivator
4–5
The same
КПЭ-3,8А
Heavy-duty cultivator
3
-- “ --
КШУ-18
Broad-catching cultivator
1
Hitch iron
ЛДГ-15
Scuffer of disc type
1
The same
ЛДГ-20
Scuffer of disc type
1
-- “ --
ЛДС-6
Scuffer-Sower (with attachment for connecting
two ЛДС-6 units)
2
-- “ --
СП-16/16А
Coupler
1
-- “ --
2КПГ-2.2
Tractive connection
1
-- “ --
СГ-21
Coupler of harrow type
1
-- “ --
БДТ-720
Heavy-duty disc-type harrow
1
-- “ --
БДТ-7
Disc-type harrow
1
-- “ --
БДТ-10
Heavy-duty disc-type double-gang harrow
1
-- “ --
БД-10А
Disc-type harrow
1
-- “ --
БМШ-20
Grub-hoe harrow
1
-- “ --

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
13
Make
Description
Quantity of
machines in
the hookup
Method of connection
---
Heavy-duty three-link blade-type harrow
1
-- “ --
БЗТС-1,0
Harrow
42
Coupler СГ-21
БЗСС-1,0
The same
42
Coupler СГ-21
ЗБНТУ-1,0
Heavy-duty harrow
7
The same
БИГ-ЗА
Needle-type harrow
5–6
Coupling СП-16/16А
ВИП-5,6
Leveller-disperser
3
The same
ЗКВГ-1,4
Roller
4
-- “ --
СЗ-3,6
Sower
5
-- “ --
СЗУ-3,6
The same
5
-- “ --
СЗА-3,6
-- “ --
5
-- “ --
СЗО-3,6
-- “ --
5
-- “ --
СЗП-3,6
-- “ --
5
-- “ --
СЗТ-3,6
-- “ --
5
-- “ --
СЛТ-3,6
-- “ --
5
-- “ --
СЗС-2,1
Sower-cultivator
7
-- “ --
СЗШР-3,6
Seed-fertiliser row drill (instead of СЗ-3,6)
1
-- “ --
СТС-2,1
Seed-fertiliser tiller planter
5
-- “ --
---
Seed-fertiliser close-row planter (instead of СЗУ-
3,6)
1
-- “ --
---
Seed-fertiliser press non-coupling planter
(instead of СЗП-3,6)
1
-- “ --
---
Seed-fertiliser row-drill tusk-type planter (instead
of СЗА-3,6)
1
-- “ --
—
Seed-fertiliser broad-catching planter
1
Hitch iron
---
Seed-fertiliser non-coupling planter with
attachment for soil compaction (instead of СЗТ-
3,6 and СЛТ-3,6)
1
The same
---
Cultivator tiller planter for broad-band sowing
1
-- “ --
СЗС-12
Cultivator sower
1
-- “ --
СЗС-14
The same
1
-- “ --
ЗПТС-12Б
Self-emptying trailer (ММЗ-768Б)
1
Hydraulic pick-up hitch
ОЗТП-8572
The same
1
The same
1ПТС-9Б
Semi-trailer (ММЗ-771Б)
1
-- “ --
ОЗТП-8573
The same
1
-- “ --
ЦТА-10
-- “ --
1
-- “ --
ПСЕ-45
Trailer tank
1
-- “ --
ПЖУ
Machine for distribution of liquid fertilisers and
pesticides
1
-- “ --
РУМ-14
Machine for fertiliser distribution
1
-- “ --
РУМ-16
The same
1
-- “ --
РУМ-20
-- “ --
1
-- “ --
ПРТ-24
Machine for distribution of solid organic fertilisers
1
-- “ --
ПРТ16
The same
1
-- “ --

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
14
Make
Description
Quantity of
machines in
the hookup
Method of connection
МЖТ-24
Machine for distribution of liquid organic
fertilisers
1
-- “ --
МЖТ-16
The same
1
-- “ --
МВБ-12
Machine for intrasoil distribution of mineral
fertilisers
1
-- “ --
ЦТА-З0
Tank
1
Hydraulic pick-up hitch
АВА-1
Hookup for fertiliser distribution
1
-- “ --
---
Hookup for fertiliser distribution on meadows and
pastures
1
-- “ --
ATTENTION! Agricultural machines and implements designed for hooking up with K-
744R1, K-744R2, K-744R3, K-744R4 tractors and not mentioned in this list must
obligatorily be agreed upon with Peterburgsky traktorny zavod, JSC.
ATTENTION! Reclamation on tractor failures in case of its hooking-up with agricultural
machines and implements, which are not agreed upon with Peterburgskytraktorny
zavod, JSC will not be accepted for review. The tractor warranty will be cancelled.
Serial numbers of tractor components
The tractor nameplate with indication of the tractor
make and model, name of manufacturer, country,
manufacturer’s trademark as well as year of
manufacture is installed in the cabin on the
instrument panel support on the left.
The tractor serial number is stamped on the front of
the bumper at the right angle (in the direction of
tractor travel). The number includes the tractor
model, i.e. K744R1, K744R2, K744R3 or K744R4,
the letter denoting the year of manufacture and
subsequent four digits corresponding to the ordinal
number of manufacture within the year.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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The serial number of the transmission gearbox is
stamped on the upper part of the gearbox, in the
area of compressor drive pulley, vertically under the
lifting eye nut.
The serial number of the pump drive reducer is
stamped on the casing at the side, on the lateral lid.
The serial number of the axle is stamped on the
case in the area of inlet flange on the left.
2.2 Brief data on construction and layout
K744R1, K744R2, K744R3 or K744R4 tractors are differentiated by design of the engine unit,
by a radiator unit.
K744R3 and K744R4 tractors have an increased weight due to installation of ballast.
Electrical equipment of tractors is fitted out with preparation for installation of the Glonass data
acquisition and storage system, which is located under the instrument panel.
When ordering tractors with the “Installation of Glonass system”option, the manufacturer
shall, in the regular mode, install this system, activate it, perform a test checkup of the
controlled parameters.
On the tractors, the possibility of installation of a rotation beacon is provided. The rotation
beacon is installed in the rear part of the cabin, on the left in the direction of tractor travel.For
installation, it is necessary to unscrew the plug, fix the beacon on the regular bracket, take off
the power cord and connect the rotation beacon. The beacon activation switch is located on the
ceiling panel of the cabin.
On the tractors, a four-stroke eight-cylinder V-shaped engine is installed:

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
16
ЯМЗ-238НД5 –on K-744R1St tractor;
8481.10 –on K-744R2St tractor;
8481.10-02 and 8481.10-04 –on K-744R3St, K-744R4St tractors.
Cummins engines are installed on K-744R1Pr tractors andOM457LA (Mercedes) engines
are installed on K-744R2Pr, K-744R3Pr and K-744R3Pr tractors.
The engine start-up is performed by an electrical starter. In order to facilitate start-up at low
temperatures, the tractors are equipped with a pre-starting heating system.
The air cleaning system isdry, double-stage, combined, with dust suction into the exhaust
pipe. The air cleaner manufactured by Donaldson is used on the tractors.
The engine cooling system is closed, with compensating circuit, with forced circulation of the
cooling fluid. In order to maintain the optimum heat conditions, the engines are provided with an
automatic fan control system.
ATTENTION! In order to avoid radiator destruction, IT IS PROHIBITED to increase the
engine speed over 1,200 RPM at the oil temperature in the hydraulic system below
30°С.
The system warm-up shall be performed by making tractor turns from one extreme
position to the other, with holding at the stop during 3...5 seconds each time or by
forced lowering of the mounted implement.
ATTENTION! IT IS PROHIBITED to fill the engine cooling system and heating system
with water.
The fuel system consists of a fuel tank, hand fuel boost pump (located under the cabin in the
direction of tractor travel in the vertical hinge pivot area), fuel coarse and fine mesh filters, high-
pressure fuel pump with variable speed regulator, automatic coupling of fuel injection advance,
low-pressure and high-pressure fuel pipelines and nozzles.
The gas discharge system is with one silencer and connecting branch pipes.
The tractor transmission includes a semi-rigid coupling and a pump drive reducer, a gearbox,
a cardan drive, an intermediate support and driving axles.
Thesemi-rigid coupling and the pump drive reducerserve for transmission of torque from
the engine to the gearbox. The reducer also performs driving to the pumps of hydraulic systems
for control of turns and mounted implement as well as provides engine deactivation from
transmission in case of idle start-up. Two lifting eye-bolts are installed in the casing of the pump
drive reducer for the purpose of its installation and dismantling.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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The gearbox is mechanical, multi-stage, four-regime, with constant-mesh gears, with a
mechanical regime change drive and hydraulic gear change without break of the power flux
within any of regimes. It allows to change the tractor motion speed, implement motion by back
running, engage the rear driving axle, transmit torque to the power take-off (PTO) as well as
ensure driving of the steering control pump from the wheels during tractor towing with faulty
engine. Four lifting eye-nuts are installed in the upper lid of the gearbox for installation and
dismantling of the latter. A lifting eye-bolt is installed on the PTO coupling housing for the
execution of similar operations.
The cardan drive consists of a cardan shaft of the gearbox, cardan shaft of the front axle,
intermediate shaft of the rear axle, intermediate support and cardan shaft of the rear axle.
The intermediate support connects the cardan shafts transmitting the torque from the transfer
shaft of the gearbox to the rear axle.
Both tractor axles are driving and serve for increase of the torque to be driven to them from
the gearbox and for its transfer to the wheels. On the tractors, the front driving axles are
suspended to the frame on two semi-elliptic carriage springs with telescopic hydraulic shock
absorbers.The rear axles of all tractors are fastened rigidly to the frame.
The service brakes are dry, of block type, with a separate pneumatic drive to the front and rear
wheels, are installed in the rear-axle drives of the leading axles.
The parking brake is with spring energy accumulators combined with the service pneumatic
chambers of the front and rear axles.
On both leading axles, wheels with low-pressure tyres are installed.Tyres 28,1R-26 of model
ФД-12 are installed on K-744R1 tractors; tyres30,5R-32 of model Ф-81 are installed on K-
744R2, K-744R3, K-744R4 tractors.
The tractor turn control system is with a power drive.
The tractor turn is performed by means of two hydraulic cylinders due to swinging the tractor
semi-frames in respect of each other around the vertical hinge pivot. On new tractors, the total
free play in the connections of “hydraulic cylinder –semi-frame lifting eyes” (over the hydraulic
cylinder axis) can be no more than 0.9 mm.The permissible total free play in the course of
operation shall not exceed 1.8 mm. The feed of working fluid to the hydraulic cylinders, which is
proportional to the angle of turn and the rotational speed of the steering wheel, is performed by
the steering mechanism РМ 2000 installed on the steering column.
A pump with adjustable flow-rate is installed in the hydraulic system of the operating equipment.
Two pressure filters provide cleaning of the working fluid to be fed from the pumps to the
hydraulic system units.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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The diagram of the hydraulic system of steering control and mounted implements is given in
Appendix 2.
The frame consists of two semi-frames, e.g. the front and rear ones connected by a hinge pivot
device. The semi-frames can rotate in respect of each other around the horizontal and vertical
hinge pivots.
The cabin is with a built-in protection framework, all-metal, two-man, hermetic, with heating,
ventilation and air conditioner, with heat absorbing tinted windows. The cabin is fitted with one
entry door on the left side.
Two seats fitted with safety belts are installed in the cabin. The driver’s seat is spring-
supported, adjustable over height, angle of back inclination in the longitudinal direction and
depending upon the driver’s weight.
The steering column has five fixed positions, e.g. nominal position at the angle of 25° to the
horizon, three positions at every 5° from the nominal position with pulling inclination and one
position with pushing inclination.
The change of the angle of inclination is performed with the pedal located in the steering column
base being pressed.
The adjustment of the steering wheel over height at the flywheel located in the steering wheel
centre being turned at 2–3 revolutions.
The pneumatic system isthree-circuit ensuring braking of the tractor front and rear axle wheels
as well as trailer wheels.
The system provides simultaneous operation of the brake drives of the front and rear wheels of
the tractor, the energy accumulator drive, the parking brake, air extraction for tyre pumping and
at tractor towing, blowing of air cleaner cassettes and the entire tractor.In addition, the
equipment for trailer brake control is installed on the tractor, which serves both for reducing the
trailer movement speed as a part of the road-train and for its automatic brake in case of break of
the coupler with the hauler.
In the brake pneumatic drive system, there are three mutually independent circuits, e.g. in case
of failure of one circuit, the remaining ones will continue functioning. The circuit independence is
provided by installation of a triple protection valve 3 into the mainline downstream of the
pressure regulator 1, which ensures the “cut-off” of the failed circuit from serviceable ones. In
doing so, the serviceable circuits will continue functioning providing tractor braking.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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The first circuit performing the function of rear wheel braking consists of receiver 2 (I) connected
with brake valve 4, service braking chambers 16 and 17 of the rear axle and hose 18. The
connection is carried out by plastic tubes and fittings. The second circuit providing front wheel
braking consists ofreceiver 2 (II) and service braking chambers 16 of the front axle.The third
circuit serving for control over energy accumulators of the parking brake and control over trailer
brakes consists of receiver 2 (III), hand brake valve 5, acceleration valve 6, three energy
accumulators of braking chambers 16, control valve for trailer brakes with single-wire drive 7,
separation valve 10, connecting head 11 and two hoses 18.
During start-up of the engine, air is supplied, over the feeding mainline pipes, from the
compressor to pressure regulator 1, which deactivates the feed of compressed air into the
system in case when the pressure is exceeded, connecting the compressor discharge mainline
with the atmosphere. The regulator automatically maintains the working air pressure in the
pneumatic system within specified limits as well as serves for protection against overload and
contamination.
When the brake pedal is pressed, air will get, through the brake valve, into the service brake
chambers, which, via the stem, activate the actuators pressing the blocks to the brake drums,
and the tractor wheels will get braked.When the pedal is retuned into the initial position, the
brake release of the braking chambers will take place by their connection with the atmosphere
and filling of air cylinders from the compressor.
The system is equipped with acceleration valve 6 designed for reduction of the pickup time of
the energy accumulator drive due to shortening of the mainline of compressed air admission
from the receiver to the actuator and air discharge through the acceleration valve into the
atmosphere. With valve 5 being open, air, through valves 6 and 7, is supplied to the energy
accumulators of the tractor brake chambers and brake head 11. The wheels are not braked.
When the valve is closed (or engine is stopped), the air pressure becomes less than the
pressure energy accumulator spring, which moves the stem acting on the actuators. The wheels
get braked; in doing so the pressure in the brake head decreases to the zero.
The diagram of the tractor pneumatic system is given in Appendixes 1, 1A.

KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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Schematic pneumaticdiagramofthebraking system
1 –pressure regulator; 2 –receiver; 3 –triple protection valve; 4 –double-section braking valve
with pedal; 5, 8 –reverse action braking valve with manual control; 6 –acceleration valve; 7 –
trailer brake control valve with single-wire drive; 9 –reference output valve; 10 –disconnecting
valve; 11 –connecting head of“А” type; 12 –condensate drain valve; 13, 14 –pressure
sensor;15 –pneumatic switch; 16 –braking chamber with spring energy accumulator; 17 –
braking chamber of type 30; 18 –hose
engine
Compressor