Belarus 1221.6 User manual

BELARUS
1221.6
1221.6-0000010 OM
OPERATOR’S MANUAL
2014

1221.6-0000010 OM
The operator's manual was composed by an engineer of the first Department of
Constructive and Experimental Works (DCEW-1), A.V. Runov, with participation of key
specialists of DCEW-1 of OJSC “Minsk Tractor Works”
Publication responsible person – Y.M. Korotky, head of engineering office of design docu-
mentation of the DCEW-1.
Executive editor – N.I. Zezetko, chief designer of tractor production of OJSC “MTW”.
Editor-in-chief – A.G. Stasilevich, OJSC “MTW” general designer.
Operator's manual contains brief description and specifications of tractors Belarus 1221.6
produced by Minsk Tractor Works. The main tractors operating rules are set forth, the in-
formation about their adjustments and maintenance is provided.
Operator's manual is meant for tractor study, operation rules and maintenance of tractors
“BELARUS-1221.6”.
In view of Minsk Tractor Works policy directed to constant upgrading of produced goods,
the construction of some units and parts of Belarus tractor may undergo changes which
are not reflected in present edition. The detailed information may be obtained from
“BELARUS” dealer.
© Open Joint Stock Company ”Minsk Tractor Works”, 2014
All rights reserved. No part of this book may be reproduced in any form without written
permission of OJSC “MTW”.

1221.6-0000010 OM
3
1 TRACTOR DESCRIPTION AND OPERATION ..............................................................11
1.1 Tractor assignment ......................................................................................................11
1.2 Technical specifications ...............................................................................................12
1.3 Tractor composition .....................................................................................................15
1.4 Vibration level at the operator's working place of the tractor “BELARUS-1221.6”....................18
1.5 Noise level at the operator's working place of the tractor “BELARUS-1221.6” .................18
1.6 Tractor and its component marking .............................................................................18
2 CONTROLS AND INSTRUMENTS ................................................................................20
2.1 Layout of controls and instruments of the tractor .........................................................20
2.2 Switches of instrument board.......................................................................................21
2.3 Upper shield unit of button switches and rear wiper switch..........................................23
2.4 Cab heater and fan control ..........................................................................................24
2.5 Conditioner control.......................................................................................................25
2.5.1 Conditioner control in conditioning mode ..................................................................25
2.5.2 Conditioner control in a heating mode ......................................................................25
2.5.3 Cab ventilation ..........................................................................................................26
2.6 Instrument board..........................................................................................................27
2.7 Pilot lamps unit ............................................................................................................29
2.7.1 General information ..................................................................................................29
2.7.2 Functioning algorithm of pilot lamp to indicate operation of heating plugs ................30
2.8 Integrated indicator ......................................................................................................31
2.8.1 General information ..................................................................................................31
2.8.2 Assignment and operation principle of integrated indicator gauges..........................31
2.8.3 Pilot lamps of the integrated indicator .......................................................................34
2.8.4 Description of testing the indicator performance.......................................................35
2.8.5 Programming panel of integrated indicator ...............................................................35
2.9 Engine control panel.....................................................................................................37
2.9.1 General information ..................................................................................................37
2.9.2 Information display....................................................................................................37
2.9.2.1 General information ...............................................................................................37
2.9.2.2 Adjustment of brightness and sharpness of the information display ......................38
2.9.2.3 Call up of changeable images and parameters on the screen of the information
display................................................................................................................................38
2.10 Steering .....................................................................................................................41
2.10.1 General information ................................................................................................41
2.10.2 Steering wheel adjustments....................................................................................41
2.11 Parking brake control .................................................................................................41
2.12 Handle for fuel feed manual control ...........................................................................41
2.13 Tractor pedals............................................................................................................41
2.14 Switching of ranges and gears of gearbox 16х8 .................................................................42
2.14.1 General information ................................................................................................42
2.14.2 Tractor velocity diagram with GB 16x8 ...................................................................42
2.15 Control panel for rear axle DL, FDA drive and front PTO. ..................................................43
2.15.1 General information ................................................................................................43
2.15.2 Rear axle DL control ...............................................................................................43
2.15.3 Front driving axle (FDA) drive control .....................................................................44
2.16 Rear and front power take-off shaft control ......................................................................44
2.16.1 Handle to shift between the continuous and ground-speed drives of rear PTO .....44
2.16.2 Rear power take-off shaft engagement ...................................................................45
2.16.3 Two-speed continuous drive of rear PTO switch.....................................................45
2.16.4 Tractor operation without use of rear PTO ..............................................................46
2.16.5 Front power take-off engagement...........................................................................46

1221.6-0000010 OM
4
2.17 Rear lift linkage control with hydraulic lift ...................................................................46
2.17.1 RLL control elements with hydraulic lift...................................................................46
2.17.2 General information about control rules for RLL with hydraulic lift ..........................47
2.18 HLL pump control.......................................................................................................48
2.19 Hydraulic lift linkage distribution valve sections (remote cylinders) control ..................49
2.19.1 Сontrol of remote hydraulic cylinders with distribution valve RP70-1221 or RP70-
1221.1 or RS213Mita installed by means of levers............................................................49
2.19.2 Control of remote hydraulic cylinders with distribution valve RP70-622 installed by
means of joystick and lever ................................................................................................50
2.20 Cutout fuses...............................................................................................................51
2.20.1 General information ................................................................................................51
2.20.2 Fuses for electrical equipment system....................................................................51
2.20.3 Fuses for electronic systems to control DL and FDA and PTO..............................54
2.20.4 Fuse for engine electronic control system...............................................................55
2.21 Cab locks and handles...............................................................................................57
2.21.1 Cab door locks........................................................................................................57
2.21.2 Left-side window opening .......................................................................................57
2.21.3 Rear window opening .............................................................................................58
2.21.4 Cab roof opening ....................................................................................................58
2.21.5 Cab emergency exits ..............................................................................................58
2.22 Seat and its adjustments............................................................................................58
2.22.1 General information ................................................................................................58
2.22.2 Adjustments of BELARUS seat...............................................................................59
2.22.3 Adjustments of Grammer seat ................................................................................60
2.23 Controlling drive of transmission hydraulic system pump ..........................................61
2.24 Controlling pneumatic system compressor ................................................................61
2.25 Connector elements of the electrical equipment ........................................................62
2.25.1 Socket to connect coupled agricultural equipment .......................................................62
2.25.2 Connection of additional electrical equipment of coupled machines ...............................62
2.26 Creeper control ..........................................................................................................63
2.26.1 Creeper control on tractors with GB16x8. ...............................................................63
2.26.2 Creeper control on tractors with GB 24x12 .............................................................64
2.27 Gears and ranges shifting of GB 24х12............................................................................64
2.28 Control of rear lift linkage with electrohydraulic control system..................................66
2.28.1 General information on control rules of rear lift linkage
with electrohydraulic control system ..................................................................................66
2.28.2 RLL control panel....................................................................................................66
2.28.3 Remote buttons of RLL control system ...................................................................68
2.28.4 Troubleshooting of RLL electronic control system ..................................................69
2.29 Fuel tank ....................................................................................................................70
2.30 SCR system operation ...............................................................................................70
2.30.1 Tank for SCR system liquid ....................................................................................70
2.30.2 Indication of SCR system operation........................................................................71
3 INTENDED USE OF TRACTOR.....................................................................................74
3.1 Safety measures to be taken preparing tractor for operation .......................................74
3.2 Tractor use...................................................................................................................75
3.2.1 Boarding the tractor ..................................................................................................75
3.2.2 Preparing for start and starting the engine................................................................75
3.2.3 Tractor motion start, GB shifting ...............................................................................77
3.2.4 Tractor stop...............................................................................................................78
3.2.5 Engine stop...............................................................................................................78
3.2.6 Leaving the tractor ....................................................................................................79

1221.6-0000010 OM
5
3.2.7 PTO use....................................................................................................................79
3.2.8 Selection of optimal inner pressure in tires depending on operational conditions and
load on tractor axles ..........................................................................................................81
3.2.8.1 Selection of optimal inner pressure in tires depending on operational conditions
and load on tractor axles....................................................................................................81
3.2.8.2 Tire inflation ...........................................................................................................82
3.2.9 Rear wheel track formation .......................................................................................83
3.2.10 Rear wheel twinning................................................................................................84
3.2.11 Front wheel track formation ....................................................................................85
3.3 Safety measures to be taken when operating the tractor.............................................87
3.3.1 General safety measures to be taken when operating the tractor.............................87
3.3.2 Fire safety measures ................................................................................................90
3.4 Tractor final assembly and run-in.................................................................................91
3.4.1 Tractor final assembly...............................................................................................91
3.4.2 Technical maintenance before tractor run-in.............................................................91
3.4.3 Tractor run-in ............................................................................................................91
3.4.4 Technical maintenance during tractor run-in.............................................................92
3.4.5 Technical maintenance after tractor run-in................................................................92
3.5 Emergency actions ......................................................................................................93
4 COUPLING OF IMPLEMENTS.......................................................................................94
4.1 General information .....................................................................................................94
4.2 Types of implements coupled with tractor “BELARUS-1221.6”....................................95
4.3 Rear lift linkage ...........................................................................................................96
4.3.1 General information ..................................................................................................96
4.3.2 Three-point rear lift linkage .......................................................................................96
4.3.3 RLL components adjustment rules .........................................................................100
4.3.3.1 Buckles ................................................................................................................100
4.3.3.2 Lifting rod .............................................................................................................101
4.3.3.3 Upper link.............................................................................................................102
4.3.4 Attachment of implements to a tractor ....................................................................102
4.4 Drawbar hitches.........................................................................................................103
4.4.1 General information ................................................................................................103
4.4.2 Drawbar hitch DH-2V (short towing yoke)...............................................................104
4.4.3 Drawbar hitch DH-ЗV (long towing yoke)................................................................105
4.4.4 Drawbar hitch DH-2R (python)................................................................................106
4.4.5 Drawbar hitch DH-1М-01 (draw bar) .......................................................................107
4.4.6 Drawbar hitch DH -1 (crossbeam)...........................................................................108
4.4.7 Automatic coupling clevis KU2000/329NB33 and automatic coupling clevis
KU5410/329-33................................................................................................................109
4.4.8 Piton-Fix coupling PB5329NNB33 .........................................................................111
4.4.9 Coupling balls KI8329NB33 and KB8329NB33 ......................................................113
4.5 Usage patterns of tractor hydraulic system for driving of operated parts and other
elements of unitized hydraulically operated machines and aggregates ...........................116
4.6 Front ballast weight..................................................................................................118
4.7 Trailer brake actuator.................................................................................................119
4.7.1 General information ................................................................................................119
4.7.2 Double-line pneumatic drive of trailer brakes..........................................................119
4.7.3 Single-line pneumatic drive of trailer brakes ...........................................................120
4.7.4 Hydraulic drive of trailer brakes ..............................................................................121
4.7.4.1 General information .............................................................................................121
4.7.4.2 Adjustment of hydraulic actuator of trailer brakes ................................................122
4.8 Determination of PTO shaft and cardan shaft applicability ........................................123

1221.6-0000010 OM
6
4.9 Features of application of PTO shafts and cardan shafts ..........................................123
4.10 Ways of changing of drawbar features and passing ability of the tractors ......................127
4.11 Features of the tractor application in special conditions...........................................128
4.11.1 Tractor operation in areas with rugged topography. .............................................128
4.11.2 Application of substances for the purpose of chemical treatment .........................128
4.11.3 Operation in a forest .............................................................................................128
4.12 Finding of total weight, loads on the front and rear axles, tires holding capacity and
required minimum ballast.................................................................................................129
4.13 Possibility of front loader installation ........................................................................131
4.13.1 General information ..............................................................................................131
4.13.2 Safety measures at tractor “BELARUS-1221.6” operation with loader installed ...133
4.13.3 Information about mounting holes of tractor..........................................................135
4.14 Three-point front lift linkage .....................................................................................137
4.14.1 General information about the device ...................................................................137
4.14.2 The rules of agricultural implements coupling to FLL...........................................139
4.14.3 Rules of shifting FLL from operating position to transport position ......................140
5 MAINTENANCE............................................................................................................141
5.1 General instructions...................................................................................................141
5.2 Providing access to the components for maintenance services .........................................143
5.3 Maintenance procedure .............................................................................................145
5.4 Scheduled maintenance servicing operations............................................................148
5.4.1 Maintenance on a shift basis (SBMS) in every 8 – 10 hours of
operation or per shift........................................................................................................148
5.4.2 Maintenance services in every 125 hours of operation ...........................................156
5.4.3 Maintenance services in every 250 hours of operation (2MS-1), in every 500 hours of
operation (MS-2), in every 1000 hours of operation (MS-3), in every 2000 hours of
operation (special maintenance) and maintenance service that is inconsistent with
intervals of MS-1, 2MS-1, MS-2, MS-3 and special MS...................................................160
5.4.3.1 General instructions .............................................................................................160
5.4.3.2 Operation 32. Check/adjustment of clearances in steering joints ........................160
5.4.3.3 Operation 33. Check and adjustment of wheels toe-in.........................................161
5.4.3.4 Operation 43. Check / adjustment of clutch pedal free travel...................................162
5.4.3.5 Operation 47. Check / adjustment of service brake control..................................163
5.4.3.6 Operation 48. Check / adjustment of parking brake control .................................164
5.4.4 General maintenance services ...............................................................................165
5.4.4.1 General guidelines ...............................................................................................165
5.4.4.2 Operation 78. Adjustment of valves of GB driven centrifuge................................165
5.4.4.3 Operation 79. Maintenance of engine air cleaner ................................................166
5.5 Seasonal maintenance services ................................................................................168
5.6 Safety measures during maintenance and repair operations.....................................169
5.6.1 General safety requirements...................................................................................169
5.6.2 Safety precautions for exclusion of hazardous situations, related to
an accumulator battery and a fuel tank............................................................................169
5.6.3 Guidelines for safe use of leveling jacks and statement of places
where they shall be installed............................................................................................170
5.7 Instruments, work tools and measuring devices while maintenance
services and repair ...........................................................................................................172
5.8 Filling and lubrication of the tractor with fuel and lubrication materials ......................173
6. POSSIBLE MALFUNCTIONS AND GUIDELINES FOR TROUBLESHOOTING 178
7 TRACTOR STORAGE..................................................................................................189
7.1 General instructions...................................................................................................189
7.2 Requirements for inter-shift storage of machines ......................................................189

1221.6-0000010 OM
7
7.3 Requirements for short-term tractors storage ............................................................189
7.4 Requirements for outdoors long-term storage ...........................................................190
7.5 Preservation...............................................................................................................191
7.6 Depreservation and represervation............................................................................191
7.7 Putting tractor into operation after long-term storage.................................................191
7.8 Safety requirements for preservation.........................................................................192
8. TRACTOR TOWING....................................................................................................192
Service bulletins……………………………………………………………………………… 193

1221.6-0000010 OM
8
Introduction
The present manual is designed for studying the structure, operation rules and mainte-
nance of tractors “BELARUS-1221.6”.
Scrutinize this manual and operator’s manual of the engine 260S4-0000100 OM, at-
tached to your tractor. It will help you to study the rules of correct operation and maintenance.
Failure to follow this instruction can lead to operator's injury or a breakdown of a tractor.
Operation of a tractor, its maintenance and repair shall be carried out only by employ-
ees, familiar with all of its parameters and characteristics and informed about necessary safety
requirements to prevent casualties.
In connection with constant development of the tractor some changes, which are not
depicted in the present manual, can be introduced in the structure of certain units and parts.
Any arbitrary changes made by a consumer release the manufacturer from responsibil-
ity for possible further injuries to the operator and tractor breakdown.
Adopted abbreviations and conventional notations:
ADL – automatic differential lock;
AB – accumulator battery;
DL – differential lock;
RADL – rear axle differential lock;
PLU – pilot lamps unit;
FB – fuse block;
FC – fast coupling;
PTO – power takeoff shaft;
PRS – power reception shaft;
HSC – hydrostatic steering control;
HLL – hydraulic lift linkage;
HS – hydraulic system;
FFVS – frequency fuel volume sensor;
STM – shift-time maintenance;
SPTA – spare parts, tools and accessories;
RA – rear axle;
RLL – rear lift linkage;
II – integrated indicator;
GB – gearbox;
HPC – heating plugs controller;
MTU – machine and tractor unit;
CC – coupling clutch;
LL – lift linkage;
IAH – inlet air heater;
FDA – front driving axle;
VC – voltage converter;
FDAD – front driving axle drive;
CM – control module;
IICP – integrated indicator control module;
HPH – high pressure hoses;
HP – heating plugs;
SM – seasonal maintenance;
MS – maintenance service;
MS1 – maintenance service No1;
MS2 – maintenance service No2;
MS3 – maintenance service No3;
DH –drawbar hitch;
ECS – electronic control system;
EECS – engine electronic control system;
EE – electrical equipment.

1221.6-0000010 OM
9
The manufacturer uses standard international symbols, regarding application of instru-
ments and control units.
Given below are the symbols with indication of their meanings.
—see the manual ;
—control manipulations;
—brake;
—fast;
—manual brake;
—slowly;
—audible beep;
—forward;
—alarm signaling;
—reverse;
—fuel;
—accumulator charging;
—coolant;
—cab roof light;
—heating plugs;
—parking lights;
—engine speed; —tractor turn indicator;
—oil pressure in the engine;
—trailer turn indicator;
—upper beam;
—temperature of engine cool-
ant;
—low beam;
—off / stop; —working lights;
—on / start;
—differential lock;
—gradual adjustment; —PTO engaged;

1221.6-0000010 OM
10
—front screen wiper;
—front driving axle drive;
—rear screen wiper and washer;
—fan;
—brake fluid level in main cylin-
der tanks;
—air filter clogged;
—oil pressure in HSC
—engine start;
—beacon
—road-train
—oil pressure in gearbox
— external cylinder – retracting
—braking of gearbox
— external cylinder – protracting
—air pressure in pneumatic sys-
tem — external cylinder – floating
— swivel lever – up
—engine stop
— swivel lever – down
—lift linkage control system
— instruments lightening — instruments power supply
— power supply +12V — AB disconnection lock
— starter — starter lock
— front working headlights on
handrails and roof

1221.6-0000010 OM
11
1 TRACTOR DESCRIPTION AND OPERATION
1.1 Tractor assignment
The tractor “BELARUS-1221.6” is intended for performance of various general –
purpose agricultural operations with mounted, semi-mounted and trailed machines and
implements, for loading-unloading works and transportation works.
The tractor “BELARUS-1221.6” is a general-purpose wheeled tractor of traction
class 2 with the wheel formula 4X4.
Appearance of the tractor “BELARUS-1221.6” is presented in figures 1.1.1.
Appearance of the tractor “BELARUS-1221.6” equipped with FPTO and FLL is pre-
sented in figures 1.1.2.
Figure 1.1.1 – Basic configuration of tractor “BELARUS-1221.6”
Figure 1.1.2 – Tractor “BELARUS-1221.6” equipped with FLL and FPTO
(for the rest see fig.1.1.1)

1221.6-0000010 OM
12
1.2 Technical specifications
Main parameters and technical specifications of tractor BELARUS-1221.6 are given
in table 1.2. 1.
Table 1.2.1
Parameter
(characteristics) title
Parameter value for the tractor
“BELARUS-1221.6”
1 Traction class as per GOST 27021 2
2 Rated traction force, kN 20
3 Engine 1)
а) model D-260.2 S4
b) engine type 2) turbocharged with intercooling of the
charged air
c) number and position of cylinders 2) six, in-line, vertical
d) displacement, l 2) 7,12
e) engine power, kW:
1) rated 2) 100,1
2) normal 97,9±2,0
f) crankshaft rated speed, rpm 2)
2100
g) specific fuel consumption at normal
power, g/(kW·h) 2)
220±7
h) turning torque rated factor, %2)
25
i) max turning torque, N·m 2)
570
4 Number of gears:
а) for forward travel 16 3)
b) for reverse travel 8 3)
5 Tractor travel speed (design) at crank-
shaft rated speed, km/h:
а) for forward motion:
1) least 1,7 3)
2) highest 35,0
b) for backward motion:
1) least 2,9 3)
2) highest 16,4
6 Tractor weight, kg:
а) structural 5600±100
b) operating with ballast 5915±100
c) max. operating 8000
d) ex-works 4) 5725±100
7 Distribution of operating weight on ax-
les, kg:
а) on front 2505±40 5)
b) on rear 3410±60 5)

1221.6-0000010 OM
13
Table 1.2.1 continued
Parameter
(characteristics) title
Parameter value for the tractor
“BELARUS-1221.6”
8 Permitted load on axles, kN:
а) on front 40
b) on rear 60
9 Max weight of the trailer, kg
а) without brakes 2500
b) with independent brake 4000
c) with overrunning brake 12000
d) equipped with a brake system (trailer
brakes are interconnected with tractor
brakes)
12000
10 Clearance, mm (on tyres of basic con-
figuration) not less than:
а) road 480
b) agrotechnical under rear wheel as-
semblies 620
11 Track dimensions (on tyres of basic
configuration), mm:
а) for front wheels 1535±20, 1635±20, 1700±20, 1800±20,
1850±20, 1950±20, 2020±20, 2120 ±20
b) for rear wheels from 1650 to 1916 and from 1946 to 2156
12 Least radius of turning circle (with
braking), m 5,0
13 Tractor base, mm 2760±50
14 Maximum fordable depth, m 0,85
15 Service life, years 12
16 Overall dimensions, mm:
а) length with weights and rear lift linkage in
transport position 4500±40
b) length without weights and rear lift link-
age in transport position 4370±50
c) width on rear wheel axle shaft ends
2300±10
d) height to the top of cab 2850±50
17 Tyres (basic configuration):
а) front wheels 420/70R24
b) rear wheels 18.4R38
18 Electrical equipment as per GOST
3940:
а) rated supply voltage in on-board pow-
er system, V 12
b) rated ignition voltage, V 24

1221.6-0000010 OM
14
Table 1.2.1 finished
Parameter
(characteristics) title
Parameter value for the tractor
“BELARUS-1221.6”
19 Hydraulic system:
а) pump displacement under crankshaft
rated speed, l/min, not less than
51
b) safety valve operation pressure, MPa
20-2
c) conventional volume factor, not less
than
0,7
20 Working equipment:
а) rear power take-off shaft:
In section 3.2.7 “PTO use”
b) rear lift linkage: In section 4 “Coupling of implements”
c) drawbar hitch: In section 4 “Coupling of implements”
_____________________________________________________________________________________________________________
1) Engine parameters, not specified in the table 1.2.1, shall meet
260S3В– 0000100 OM document.
2) For referential use.
3) Without a creeper. Installation of a creeper against order provides additional four
speeds for forward travel and four speeds for the reverse.
4) Specified depending on the configuration.
5) With ballast weights mounted.
Note – Number of gears and travel speeds of the tractor at crankshaft rated speed
are in table 1.2.1 for tractors “BELARUS-1221.6” with GB 16x8 (basic configuration).
Number of gears and travel speed of the tractor “BELARUS-1221.6 with GB 24x12 (op-
tional configuration) are given in subsection 2.27 “Gears and rages shifting of GB 24x12”.

1221.6-0000010 OM
15
1.3 Tractor composition
Tractor framework – semi-frame.
Undercarriage: front and rear driving wheels, with pneumatic tyres of low pressure.
Steering wheels are front wheels. The wheels can be twinned by means of spacers.
The tractor is equipped with 4-stroke piston six-cylinder inner combustion engine with
in-line vertical arrangement of cylinders, with direct injection of diesel fuel and compression
ignition, corresponding to environmental requirements of Stage 4.
System of engine lubrication is combined, some parts are lubricated under pres-
sure, some – by spattering. The lubrication system consists of an oil sump, oil pump, liq-
uid-oil heat exchanger, oil filter and oil filter with paper filtering element.
The engine fuel supply system consists of the following parts:
- accumulator system of fuel supply Common RAIL, including a high-pressure fuel
pump, injectors, fuel accumulator under high pressure, sensors of engine working envi-
ronment condition (pressure and temperature of fuel and air), electromagnetic actuating
mechanisms (fuel governor, electromagnetic injection valves), electronic unit of control and
communication check circuits, low-pressure pipelines, high-pressure pipelines;
- fuel fine filters;
- fuel coarse filters.
System of engine start-up is electric starter. A means of start-up facilitation under
low environmental temperatures are the heating plugs.
System of air delivery consists of a turbocharger, an air pipeline and a system of
charged air cooling.
The turbocharger is executed as follows: radial centripetal turbine and centrifugal
single-stage compressor with cantilever arrangement of wheels in relation to supports.
The system of air purification consists of a dry-type air cleaner with build-in unit
“monocyclon”, two paper filtering elements are used. Air ingress with an air-cleaner is per-
formed through the unit “monocyclone” which provides preliminary inertial air cleaning at the
expense of tangential inflow and centrifugal forces, arising at spiral air rotation in relation to
the axle of small separate cells of the unit “monocyclone”, discharging large-size dust parti-
cles.
Cooling system for charged air is of a radiator type. The CAC radiator is intended for
cooling the air, charged into the inlet collector.
System of engine cooling is closed-type with coolant compulsory circulation exe-
cuted by a centrifugal pump. The water pump is driven by a V-belt from the crankshaft pul-
ley. For acceleration of engine warming up after start-up and for automatic control of a
temperature mode at various loadings and ambient temperatures there is a thermostat.
Two systems of selective catalytic reduction (SCR1, SCR2) are additionally in-
stalled in the exhaust system to provide a required chemical composition of exhaust gases
under Stage 4.
The coupling clutch is frictional, dry, two-disk, spring-loaded. The CC overlays are
asbestos free. The coupling control drive is mechanical.
The gearbox is 16F + 8R, mechanical, fixed-ratio, with constant-mesh gears. Shift-
ing of gears within the ranges is executed by means of synchro-mesh units, switching be-
tween ranges is executed by toothed clutches.
Optional can be installed GB 24x12.
The rear axle is with the main drive, differential, hub and final drives of planetary
type.

1221.6-0000010 OM
16
Brakes: service brakes are multidisk, oil-lubricated, located on final drive pinion
shafts; the parking brake is independent, manually controlled. It is possible to mount the
dry-friction brakes. The trailer brake control drive can be single-line or double-line pneu-
matic, either hydraulic, interlocked with tractor service brakes control. Against order the
tractor may not be equipped with the trailer brake pneumatic drive – tires are inflated
through a valve of the pneumatic compressor.
The rear power takeoff shaft is continuous, dual-speed (540 and 1000 min-1) and
synchronous, the direction of rotation is clockwise when viewed from the shaft end face.
There are PTO shaft end extensions: PTO shaft end extension 1 (6 splines, 540 min-1),
PTO shaft end extension 1c (8 splines, 540 min-1), PTO shaft end extension 2 (21 splines,
1000 min-1).
Front PTO (against order) is continuous, one-speed. PTO 2 shaft end extension (21
teeth) complies with GOST 3480. The direction of rotation is clockwise as viewed from the
side of the shaft end extension butt end.
The transmission hydraulic system provides for the following:
- FDA drive engagement, differential lock, PTO engagement (optional);
- filtration of transmission oil;
- pressure feed lubrication of gearbox bearings, of FDA drive bearings;
Steering is hydrostatic. The feed pump is gear-type, the direction of rotation is left.
The dosing pump is gerotor-type, with open center, without respond on the steering wheel.
The type of the rotation mechanism - two hydraulic cylinders (TS50x200) of bidirectional
operation and a steering linkage.
The front driving axle has an axle drive gear, a self-locked differential, final gears
(planetary gear groups). The FDA drive is a parallel-shaft gear unit with hydraulically-
pressed clutch built in the gearbox, a propeller shaft. The FDA drive control is electro-
hydraulic.
The lift linkage is a remote-cylinder system with a hydraulic lift, with rear left and
right duplicated outlets of the hydraulic system – depending on the HHL control type.
Optional the tractor can be equipped with EHR electro-hydraulic system of rear lift link-
age automatic control.
Free drain is available at the back of the tractor for operation with hydraulic units
with constant delivery, hydraulic motors for instance.
The rear lift linkage is a three-point linkage of category 2 under ISO 730 and a link-
age 2 under 10677 with external locking of lower link. There are two cylinders TS80x220
or TS90x220(210).
Optional the tractor can be equipped with three-point lift linkage with attaching points of cat.3
according to ISO 730 and LL-3 acc.to 10677 with outer blocking of lower links.
The front lift linkage (against order) is a three-point linkage of category 2 under ISO
730 and a linkage 2 according to GOST 10677. There are two cylinders TS63x200.
Drawbar hitches of a lift type:
- short towing yoke DH 2V – for coupling with semi-trailers and semi-trailed imple-
ments;
- long towing yoke DH 3V – for coupling with trailers and trailed implements;
- pin DH-2R (“Python”) – for coupling with semi-trailers and semi-trailed machines
(against order);
- towing bar DH-1M-01 –for coupling with semi-trailed and trailed agricultural ma-
chines (against order);
- cross member DH-1 – for coupling with trailed and semi-trailed machines (against
order).

1221.6-0000010 OM
17
Drawbar hitches of lift type, which can be bought and mounted on tractors BELA-
RUS-1221.6 by customer itself, are as follows:
- coupling clevises KU2000/329NB33 or KU5410/329-33 (produced by the company
“Walterscheid”) with spherical ball – for coupling with trailers and semi-trailers and agricultural
machines on trailers and semitrailers base;
- coupling Piton-Fix type PB5329NNB33 (produced by the company “Walter-
scheid’) – for coupling with agricultural machines, having on hitch bar a tail-piece with loop;
- coupling balls type KI8329NB33 and KB8329NB33 (produced by the company
“Walterscheid”) – for coupling with agricultural machines, having on hitch bar an tail-piece
with spherical seat;
With MTW consent the customer can buy and mount on the tractor coupling clev-
ises, coupling “Piton-Fix” and coupling balls of other manufacturers, if their parameters
and coupling dimensions correspond to parameters and coupling dimensions set forth in
respective tables 4.4.6, 4.4.7, 4.4.8, 4.4.9, 4.4.10 of subsection 4.4. “Drawbar hitches”.
The cabin is a one-seated with a protective rigid framework, having thermal, noise
and vibration insulation, equipped with a sprung seat adjustable for operator's height and
weight, with rear-view mirrors, with a sun visor, with electrical wipers for front and rear
screens, with front and rear screen washers, with a roof lamp and a place to install a radio
set, with a system of heating and ventilation (upon request – additional air-conditioning).
Upon request the tractor can be equipped with an additional seat. The cab doors have got
locks, there are keys for the left door. Right door is for emergency exit. The cab complies
with category 2 under EN 15695-1:2009.
The electrical equipment complies with GOST 3940. The rated power supply volt-
age for on-board network is 12V. The rated voltage for the start-up is 24V.
Instruments are a combination of devices; these are an integrated indicator; infor-
mational display; pilot lamps (glow lamps and light emitting diodes), located on the block of
pilot lamps, on the control panel of the rear axle differential lock, PTO and FDA drive, on
the engine control system board.

1221.6-0000010 OM
18
1.4 Vibration level at the operator's working place of the tractor “BELARUS-1221.6”
The vibration level at the operator's seat complies with the Council Directive
78/764/ЕEС. Values for the vibration level are given in the EU type approval on each type
of a seat.
1.5 Noise level at the operator's working place of the tractor “BELARUS-1221.6”
Noise level at the operator's workplace conforms to Directive 2009/76/ЕС, Appendix
2, and does not exceed the value 86 dB (A). External noise level conforms to Directive
2009/63/ЕС and does not exceed the value 89 dB (A).
1.6 Tractor and its component marking
Metal nameplate is fixed at the rear of the cab on the left side, as shown in fig.
1.6.1.
Additionally the tractor serial number is applied by means of percussion on the right
side member and duplicated on the right or left plate of the front ballast weight.
Figure 1.6.1 – Place of application the tractor nameplate
Engine number and numbers of its components are given in engine operation manual.

1221.6-0000010 OM
19
Numbers of tractor components are given in table 1.6.1.
Table 1.6.1 – Numbers of tractor components
Number of clutch casing
Number of gear box
(to the left along the tractor
movement)
Transmission and rear axle
serial number on tractors
with hydraulic lift (to the
right along the tractor
movement)
FDA number
Cab serial number
Serial number
GB variant
number

1221.6-0000010 OM
20
2 CONTROLS AND INSTRUMENTS
2.1 Layout of controls and instruments of the tractor
Controls and instruments, located in the tractor cab, are presented in fig. 2.1.1.
Figure 2.1.1 – Tractor controls and instruments