Belarus 510 User manual

BELARUS
510/512
510-0000010 РЭ
OPERATING MANUAL
2009

This Operating Manual is compiled by Engineer of Minsk Tractor Works Leading
Specialized Design Office I.N. Korobeynik in collaboration with top-level specialists of
the Leading Specialized Design Office of Republican Unitary Enterprise Minsk Tractor
Works
Editor-in-Chief —Director, Scientific and Technical Center
Chief Designer I.N. Uss
Supervisor for the Issue—Head of Design Office, O. N. Natalevich
Belarus-510/512 tractors Operating manual
This Operation and Service Manual contains a brief description and specifications of
Belarus 510/512 tractors manufactured at the Minsk Tractor Works. Basic rules of
machine operation are presented, as well as information on adjustments and technical
servicing of tractor units and assemblies, are given.
This Operating Manual is intended for operators (tractor drivers) operating the Belarus
tractors.
In view of the RUE MTW policy of constant improvement of its products, changes in the
design of certain assemblies and components of the Belarus tractor may be introduced
without notice, that are not represented in this edition.
Some specifications and illustrations found in this Manual may differ from those actually
found on your tractor. The dimensions and weights are approximate (for information
purposes only). For more detailed information, please contact your local Belarus dealer.
General note: References to the “left-hand” or “right-hand” terms in the text of this
Manual are given from the point of view of an observer viewing the moving forward
tractor from behind.
© Minsk Tractor Works Republican Unitary Enterprise, 2009
All rights reserved. No part of this book may be reproduced or copied in any form
whatsoever without written permission of Minsk Tractor Works RUE.

TO OPERATOR’S ATTENTION!
1. Before you start operating the tractor, carefully read this Manual and strictly follow
all instructions herein.
2. Use the climatic diesel fuel according to the Manual. Reduce the motor oil
changeover intervals by half, if the sulfur content in the fuel is below 1%.
3. Do not operate the diesel engine at the idle speed more than 15 minutes.
4. Remember that the engine can be only started when the GB lever is in the extreme
left position (in the position of engaging the I or II gear range).
5. Use the synchronous drive of the rear PTO only when the tractor unit speed does
not exceed 8 km/h. Otherwise, severe damages in the tractor power train are
possible.
6. Operate the tractor on the direct gear only with the high gear range engaged (range
II).
7. The tractor cab is equipped with a single seat, only operator is allowed to be in it.
8. When the tractor is shipped from the manufacturer factory, some parts of the tractor
are put into the SPTA box, tool box or cab. Install them onto the tractor on your own.
9. When commissioning new batteries, remove the sealing film from the vent holes or
cut off the bosses on the plastic caps.
10. Do not operate the tractor when the clutch is not totally disengaged or is engaged.
11. When starting movement, make sure that the hand-operated reserve parking brake
is disengaged.
12. When using the tractor without driveshafts, shift the FDA lever to the position
“forced”.
13. Do not work on the tractor in closed rooms without adequate ventilation (air
exchange). Exhaust gases can kill you!
14. Towing the tractor with front wheels lifted is strictly forbidden. Failure to observe this
rule may result in a FDA drive failure and emergency situation.
15. Never lift the front part of the tractor by the towing shackle. Use the shackle for
towing only.
16. The manufacturer continually improves the tractor, due to which there could be
some modifications of the design of some components and their operating rules,
which are not reflected in this Manual.

Introduction Belarus-510/512 Operating manual
7
INTRODUCTION
The BELARUS 510/512 wheeled universal tilling tractors belong to the drawbar
category 1.4 and are designed to perform a wide range of agricultural works: from soil
preparation for sowing to harvesting and transporting operations; they can be used in
forestry, municipal servicing, construction and industry.
This Manual contains a description of the design features, brief technical data and
recommendations for operation and maintenance of the BELARUS 510/512 tractors:
BELARUS-510/512 (4×2) and (4×4) with a Д244 diesel engine (41.9 kW at 1700
rpm), a 9F/2R manual gearbox.
Re-equipment or modifications to the tractor design without approval from the
Manufacturer is forbidden.

Introduction Belarus-510/512 Operating manual
8
Abbreviations and designations
SB
—
storage battery
DL — differential lock
PCU — pre-heater control unit
UDC — upper dead center of engine piston
PTO — power take-off shaft
HLL — hydraulic list linkage
HSU — hydrostatic steering unit
LOHE — liquid-oil heat exchanger
RHL — rear hitch linkage
GB — gearbox
C — clutch
ОЕСD — Organization for Economic Cooperation and Development (OECD)
FDA — front driving axle
ADCS — automatic tilling depth control system
MS — maintenance service
HDC — haul-and-draw coupler
SRU — speed reducer

Introduction Belarus-510/512 Operating manual
9
International symbols
The manufacturer uses standard international symbols concerning application of the
devices and controls.
Below are given the symbols with their respective meanings.
—see Manual
—controls manipulations
—brake —forward
—park brake —back
—horn —battery charging
—fault signaling —interior lamp
—fuel —clearance lights
—coolant
—turn signal lamp
—pre-heater glow plug —upper beam
—engine speed —low beam
—engine oil pressure —working lights
—engine coolant temperature —differential lock
—off/stop —power take-off shaft on
—on/start —front driving axle on
—gradual change
—fan
—lever down —windshield washer
—lever up —windshield wiper

Introduction Belarus-510/512 Operating manual
10
—
“lift” position of the distributor
slide valve
—rear window wiper
—“drop” position of the
distributor slide valve
—tractor trailer turn signal
—“float” position of the
distributor slide valve
—HSU oil pressure
—GB oil pressure
—air pressure in pneumatic
system
—air filter clogging

Section A. Safety precautions Belarus- 510/512 —Operating manual
11
Section A. Safety precautions
Strict observance of the safety precautions
and closed following the rules of tractor
operation and management ensures full
safety safe of its operation.
Safety regulations for operation of the
tractor
ATTENTION! When starting the die-
sel-engine and manipulating with the
controls, always be in the cab, sitting
in the driver’s seat.
G
General instructions
•Carefully read the operator’s manu-
al before using the tractor. Insufficient
knowledge on the control and operation of
the tractor may result in accidents.
•Only specially trained and qualified
operators are allowed to operate the tractor.
•If the tractor equipped with a safety
belt, use it for work. If the tractor is not
equipped with a safety belt, contact your
dealer.
•The tractor cab is for one man, no
passengers are allowed.
•Keep clean all the warning signs. If
the signs are damaged or lost, replace
them with new ones.
•Before you start your work, carefully
inspect the tractor and the towed machine.
Get started only after you make sure they
are fully serviceable. Towed agricultural
machines and transport trailers must have
rigid hitches precluding them from swinging
and hitting the tractor during transportation.
•Before starting the diesel engine, the
parking brake must be engaged, the gear-
box shifter must be shifted to the neutral
position, the PTO engaging lever to the off
position.
•Before you start movement, horn to
warn other persons and persons working on
the towed machines.
•Do not leave the tractor in motion.
•Before leaving the cab, disengage
the PTO, stop the diesel engine, engage
the parking brake, take out the starter key
and turn off the ground switch.
•Do not turn off the electrical system
with the ground switch before the diesel
engine is stopped.
•Do not work on the tractor in a
closed room without adequate ventilation.
Exhaust gases can kill you!
•In case of a fault, immediately stop
the tractor and fix the fault.
•In case of a diesel engine or a steer-
ing gear failure, immediately stop the trac-
tor. Remember that with the diesel engine
stopped, you have to apply a much greater
force to the steering wheel to control the
tractor.
•Do not work under raised agricultural
implements. During long stops, do not leave
toolbar implements in a raised position.
•If the front of the tractor takes off the
ground when mounting heavy machinery
and implements to the mechanism, attach
front counterweights.
•When working with a front-end load-
er, fill the rear tires with liquid ballast.

Section A. Safety precautions Belarus- 510/512 —Operating manual
12
•Before lifting and lowering an agri-
cultural implement, as well as when mak-
ing turns, make sure that there is no
hazard to hit someone or run over an
obstacle.
•During transport journeys with
mounted machines or implements, al-
ways use the mount lock in the raised
position (for tractors with an autonomous
power cylinder).
•The driveshaft transmitting rota-
tion from the tractor PTO shaft to the ag-
gregated tools of the unit must be guard-
ed.
•Ensure the correct installation of
any additional equipment or auxiliary de-
vices, and make sure that they are de-
signed for use with your tractor. Remem-
ber that your tractor, if improperly used,
can be dangerous both for you and for
other persons. Do not use equipment
that is not intended for installation on the
tractor.
•To avoid a tipover, exercise cau-
tion when driving the tractor. Choose a
safe speed appropriate to road condi-
tions, especially when driving on rough
terrains, when driving over ditches,
slopes and making sharp turns.
•When working on slopes, increase
the tractor wheel track to the maximum.
•Do not make sharp turns with a
full load and at a high speed.
•When using the tractor for trans-
portation works:
−increase the tractor wheel truck to
1,800 mm (70") min.;
−interlock the brake pedals, check
and adjust as necessary the brakes for
simultaneous action;
−check operation of the parking
brake;
−check the condition of light and
sound signal equipment;
−transportation trailers must have a
solid connection and, in addition, con-
nect a safety chain or rope;
−never drive downhill by coasting
(out of gear), drive at the same gear both
downhill and uphill;
−do not work with a trailer without in-
dependent brakes if its weight exceeds
half of the total actual weight of the trac-
tor. The faster you drive and the greater
is the towed weight, the greater must be
the safe distance;
−disconnect the FDA in order to
avoid excessive wear of the drive parts
and tires;
−do not use the rear axle DL at a
speed exceeding 10 km/h and when
making turns;
−the PTO must be off and the simul-
taneous/independent drive shifter arm
must be in the neutral position;
−do not stop the tractor on slopes. If
you want to stop, engage the 1st gear
and fully engage the parking brake.
•When working with equipment
driven from the PTO, disengage the PTO
before disconnecting the equipment,
stop the diesel engine, make sure the
PTO shaft end is fully stopped.
•Do not wear loose clothing when
working with the PTO or near rotating
equipment.
•When working with stationary ma-
chines driven from the PTO, always en-
gage the parking brake and chock rear
wheels from the front and from the rear.
Make sure that the machine is reliably
secured.
•Make sure that the PTO shaft end
guard is installed, and when the PTO is
not used, install the PTO shaft end cap
to place.

Section A. Safety precautions Belarus- 510/512 —Operating manual
13
•Do not clean up, adjust or service
the equipment driven from the PTO with
the diesel engine running.
Safety requirements for maintenance
service
•Never refuel the tractor with the
diesel engine running.
•Do not smoke when refueling the
tractor.
•Do not fill the fuel tanks complete-
ly. Leave a space for fuel expansion.
•Never add gasoline or blends to
diesel fuel. Such combination may result
in higher hazard of flame or explosion.
•Make proper use of summer and
winter grades of fuel. To reduce the
amount of night condensate, refill the
fuel tank at the end of each working day.
•Refill the tractor only with oils and
greases recommended by the manufac-
turer. Use of other lubricants is strictly
prohibited!
•All operations related to cleaning
the engine and the tractor, preparation to
work, maintenance, etc. must be per-
formed with the engine off and the tractor
brake engaged.
•The cooling system operates un-
der pressure maintained by a valve in-
stalled on the filler cap. It is dangerous
to remove the cap on a hot engine. To
avoid burns of face and hands, take spe-
cial care when opening the radiator cap
on a hot engine, put a thick cloth onto
the cap first and put on a glove.
•To avoid burns, be careful when
draining the coolant from the cooling sys-
tem, hot oil from the diesel engine, hy-
draulic system and transmission.
•Exercise caution while servicing
storage batteries as electrolyte causes
burns in case of skin contact.
•To avoid risk of explosion, do not
allow a source of open fire near the fuel
system of the engine and batteries.
•Keep your tractor and its equip-
ment, especially the brakes and steering
equipment, in good condition to ensure
your safety and that of the surrounding
people.
•Do not modify the tractor or any of
its constituent parts without approval
from you dealer and manufacturer.
Safety requirements for operation and
maintenance of electrical equipment
•To avoid damages to semiconduc-
tor devices and resistors, observe the
following precautions:
−do not disconnect the storage bat-
tery terminals when the diesel engine is
running. This will result in peak voltage
in the charging circuit and unavoidable
damage of diodes and transistors.
−do not disconnect the electrical
wires until the diesel engine stops and all
electrical switches are switched off;
−do not cause a short circuit due to
faulty connection wires. A short circuit or
wrong polarity will cause damage to the
diodes and transistors;
−do not connect the storage battery
to the electrical system until terminals
and voltage are checked for the polarity;
−do not check availability of electric
current by sparking as it will result in an
immediate breakdown of transistors.
Hygiene requirements:
•If duration of continuous work on
the tractor exceeds 2.5 hours per a work-
ing shift, use personal protection equip-
ment to muffle noise as per State Stand-
ard ГОСТ 12,4.051-87 (such as ear pro-
tectors, ear plugs)
Fire safety requirements
•The tractor must have firefighting
tools such as a shovel and a fire extin-
guisher. Working on the tractor without
fire-fighting equipment is prohibited.
•The tractor park sites, fuel and
lubricant storage places must have a
surrounding plowed strip with a width of
3 m min. and be provided with fire-
fighting means.
•Avoid contamination of the mani-
fold and silencer with dust, fuel, straw,
etc.

Section A. Safety precautions Belarus- 510/512 —Operating manual
14
•Do not allow straw to be taken up
by rotating parts of the machines at-
tached to the tractor.
•When rinsing parts and assem-
blies with kerosene or gasoline, take
precautions to exclude ignition of vapors
of the rinsing fluid.
•Do not operate the tractor in plac-
es of high fire hazard with the hood and
other protective devices removed from
hot parts of the engine.
•Do not use open fire to heat up oil
in the diesel engine pane, to burn out
contamination of the radiator core.
•If there appears a seat of fire,
dump sand over it, cover with tarpaulin,
sackcloth or any other dense cloth. Use
a carbon-dioxide fire extinguisher. Do not
extinguish burning fuel with water.
•When the engine is running, keep
inflammable materials away from the ex-
haust manifold and muffler.
•When making hay and straw or
working in places with high fire hazard,
use spark arresters in the exhaust sys-
tem complete with a silencer or separat-
ed from it.

Section B. Specifications Belarus-510/512 Operating manual
15
Section B. SPECIFICATIONS
Weight and Overall Dimensions
C
Name 510 512
A
Length, mm: total (with counterweights)
:
without counterweights
by
wheels
4,120
3,840
3,650
4,120
3,930
3,740
В
Width, mm
1,970
1,970
С
Height by cab, mm
2,780
2,800
D
Wheel
base, mm
2,370
2,450
F
Rear track, mm
1,400
-
1,600
1,800
-
2,100
E
Front track, mm
1,350
-
1,850
1,400
-
2,000
G
Road clearance, mm
465
465
Tire size: front wheels / rear wheels
9.00
-
20,
9.00R20/
15.5R38
11.2
-
20,
11.2R20/
15.5R38
Service weight, kg 3,460 3,690
Tractor component Nos.
Manufacturer’s nameplate with tractor and diesel
engine serial Nos. indicated

Section B. Specifications Belarus-510/512 Operating manual
16
The serial number of the tractor is duplicated
on the front part of the right half-frame side
member (or on the right plate of the front
counterweights).
Diesel engine serial No. (duplicated on the
manufacturer’s nameplate of the engine at-
tached to the cylinder block, on the left-
hand side).
Clutch No. (on the left-hand side of the
clutch housing).
Gearbox No. (on the left-hand side of the
GB housing)

Section B. Specifications Belarus-510/512 Operating manual
17
Transmission number (on the rear axle housing from behind).
Front driving axle number (on the front
part).

Section B. Specifications Belarus-510/512 Operating manual
18
Diesel engine
Engine model Д-244
Type four-stroke, in-line, naturally aspirated
Number of cylinders 4
Mixing method Direct injection
Compression (calculated) 16
Cylinder bore, mm ( " ) 110 (4.32)
Stroke, mm ( " ) 125 (4.92)
Cylinder displacement, l (cu. in.) 4.75 (290)
Operation order 1—3—4—2
Cooling system; liquid
Rated speed, rpm 1,700
Maximum speed, rpm 1,850
Minimum speed, rpm 600
Rated power, kW 41.9
at 1,700 rpm
Maximum torque, N•m 271 at 1,400 rpm
Clearance between intake and ex-
haust valves and rockers at cold en-
gine, mm
0.20…0.35
Advance angle of fuel injection before
upper dead center (UDC), degrees
20 ± 1
Fuel injection pressure, MPa
(kgf/cm²)
21.6…22.4
(220 … 228)

Section B. Specifications Belarus-510/512 Operating manual
19
Engine lubrication system
Type: combined with oil radiator.
Minimum oil pressure:
0.08 MPa (0.8 kgf/cm²) at 600 rpm.
Normal oil pressure:
0.2...0.3 MPa (2…3 kgf/cm²).
Max. pressure at cold diesel engine: up
to 0.6 MPa (6 kgf/cm²).
Capacity of lubrication system: 12 l
Motor oil grades:
- –40°Сto +5°С: M-8ДM; M-8Г
2
,
M-8Г
2K
or M4
3
/8Г
2
(SAE-20,
SAE 10W-20);
- +5°Сto +50°С: M-10ДM; M-10Г
2
; M-
10Г
2K
(SAE-30);
- multigrade oil: SAE 15W-40.
Engine feed system
Fuel pump: 4-plunger type, in-line, with
booster pump.
Governor: mechanical, variable-speed.
Fuel filters: coarse and fine filter (with a
replaceable filter element ФT 020 -
1117010).
Fuel grade: Diesel fuel: summer grade
Л-0.2-40, Л-0.5-40; winter grade З-0.2, З-
0.5.
Fuel tanks capacity: 120 l
Air cleaner: combined with dry centrifugal
and oil-bath air cleaning.
Air cleaner oil bath capacity: 1.5 l.
Steering
Booster type: hydromechanical.
Steering mechanism: worm, helical gear
sector and steering booster.
Pump type: gear pump
НШ10–3–Л.
Pump capacity: 21 l/min
Maximum working pressure in system:
9.0 ± 0.05 MPa.
Oil grades:
- –40°Сto +5°С: M-8ДM; M-8Г
2
,
M-8Г
2K
or M4
3
/8Г
2
(SAE-20,
SAE 10W-20);
- +5°Сto +50°С: M-10ДM; M-10Г
2
; M-
10Г
2K
(SAE-30);
- multigrade oil: SAE 15W-40.
Steering wheel position control limits:
·by tilt: from 25°to 40°with fixation
through 5°;
·by height within 100 mm.
Steering wheel free play: 25°max.
Engine start system
12 V electric starter.
Engine cooling system
Type: closed with forced coolant circula-
tion, temperature controlled by thermostat-
ic regulator.
Normal operating temperature: 80°C to
100°C.
Cooling system capacity: 20 l.
Clutch
Type: friction, dry, single-disk, spring-
loaded.
Driven disk diameter — 340 mm.

Section B. Specifications Belarus-510/512 Operating manual
20
Gearbox
Type: (standard) 9F/2R , mechanical.
Gear and range shift pattern
Rated speeds (km/h) of the BELARUS — 510/512 tractors
(standard, equipped with 15.5R38 tires)
Rated engine
speed, rpm 1,700 R k, m 0.75 I zm 18.1346
Motion No. of
gear
No. of
range Gear ratio V tr, km/h
range GB transmission
front 1 I 2.2500 5.9298 241.9512 1.9866
2 II 1.3214 5.9298 142.0983 3.3826
3 I 2.2500 2.0476 83.5488 5.7531
4 2.2500 1.6667 68.0048 7.0681
5 2.2500 1.4074 57.4263 8.3701
6 II 1.3214 2.0476 49.0683 9.7958
7 1.3214 1.6667 39.9393 12.0348
8 1.3214 1.4074 33.7265 14.2518
9 1.0000 1.0000 18.1346 26.5053
reverse 1R I 2.2500 2.8166 114.9268 4.1823
2R II 1.3214 2.8166 67.4967 7.1213

Section B. Specifications Belarus-510/512 Operating manual
21
Fig. 1. Gearbox of BELARUS-510/512 tractor (9F/2R)
1 — drive pinion of 4th and 5th gears; 2 — fork of 4th and 5th gears; 3 — forks housing; 4
— fork of 3rd and 6th gears; 5 — drive pinion of 3rd and 6th gears; 6 — output shaft with
driven pinion of Ist stage of range reducer; 7 — gear shifter lever; 8 — reducer fork; 9 —
reducer shaft; 10 — GB lever handle; 11 — GB control cover; 12 — restrictive plate; 13 —
adjustment shims; 14 — body; 15 — drive pinion of rear axle final drive; 16 — driven pin-
ion of IInd stage of range reducer; 17 — inner shaft; 18 — seat with bronze bushings; 19
— impeller; 20 — body; 21 — drive pinion of Ist stage of range reducer; 22 — drive pinion
of Ith stage of range reducer; 23 — intermediate pinion; 24 — driven pinion of 3rd and 6th
gears; 25 — driven pinion of 4th and 7th gears; 26 — driven pinion of 5th and 8th gears
and reverse gears; 27 — GB housing; 28 — seat: 29 — intermediate shaft; 30 — body; 31
— input shaft; 32 — glass

Section B. Specifications Belarus-510/512 Operating manual
22
Fig. 2. Gearbox of BELARUS-510/512 tractor (9F/2R)
1 — forks housing; 2 — housing; 3 — adjustment shims; 4 — engine start lock sensor; 5
— axle of frame; 6 — ball bearing; 7 — frame; 8 — spring; 9 — bolt; 10 — lever; 11 —
ball; 12 — lock strips; 13 — fork of 4th and 5th gears; 14 — range reducer rod; 15 — cov-
er; 16 — check plug; 17 — drain plug; 18 — cover; 19 — oil dipstick; 20 — fork of 1st gear
and reverse gears; 21 — fork of 3rd and 6th gears; 22 — GB cover; 23 — driven pinion of
hill-climbing gears and reverse gears; 24 — pinion of hill-climbing gears and reverse
gears; 25 — shaft of 1th gear and reverse; 26 — FDA drive pinion axle; 27 — reverse in-
termediate gear; 28 — FDA drive pinion axle; 29 — FDA drive pinion
Gearbox
The gearbox (GB) is an element of the tractor transmission serving to change the
transmission gear ratios and reverse the tractor movement, thus achieving the required
speed range of the tractor (see Table 1), as well as for long-term disengagement of the
engine and the tractor propeller.
Besides, the GB design provides driving the front drive axle (FDA) of the tractor
and synchronous rear power take-off shaft (PTO).
The BELARUS-50/52 tractors and their modifications have a mechanical fixed-ratio
dual-range 9F/2R GB with a central position of the GB control lever, the design and opera-
tion of which are described below.

Section B. Specifications Belarus-510/512 Operating manual
23
1.1 GB design
The GB (Fig. 1 and 2) consists of the mechanical gears unit and GB control.
1.1.1 Mechanical gears unit
The mechanical gears unit of the GB consists of the concentric input (31) and out-
put (6) shafts located in the GB housing (27) (Fig. 1)
*
, as well as an intermediate shaft (29)
parallel to them and the shaft of 1st gear and reverse (24) (Fig. 2).
The input shaft (31) (Fig. 1) is mounted on two ball bearings one of which is placed
in the body (32) on the front wall of the GB housing (27). The second one is in the boring
of the output shaft (6). On the input shaft, a double-wheel drive pinion of 4th and 5th gears
(1) and a drive pinion of 3rd and 6th gears (5) with possibility of axial sliding movement
along the shaft splines are installed.
The output shaft supports (6) (Fig. 1) are two tapered roller bearings, one located in
the GB housing boring (27), and the second in the body (14) installed in the boring of the
rear wall of the GB housing (27). Structurally, the output shaft is made as one piece with
the driven pinion of Ist stage of the range reducer. The gear ring is located cantilevered in
front of the output shaft (6). Between the supports of the output shaft, the driven pinion of
IInd stage of the range reducer (16) is installed fixed on the splines, which is also the drive
pinion of the rear PTO synchronous drive. On the rear arm of the output shaft, the drive
gear (15) of the rear axle final drive (small bevel pinion) is installed fixed on the splines.
On the intermediate shaft (29), fixed on the splines are installed the double-wheel
driven pinion of 5th and 8th gears and reverse gears (26), driven pinion of 4th and 7th
gears (25), and driven pinion of 3rd and 6th gear (24), on the hub of which the double-
wheel intermediate pinion (23) is freely rotating on needle roller bearings, being in constant
mesh with the pinion (22) (Fig. 2) installed on the shaft of 1st gear and reverse gears (24).
On the intermediate shaft (29) (Fig. 1), with the possibility of axial movement the drive pinion (22) of Ist stage
of the range-reducer is installed.
The front support of the intermediate shaft (29) is a ball bearing located in the body
(30) of the front wall of the GB housing (27). The rear support of the intermediate shaft is a
bronze bushing installed in the boring of the drive pinon (21) of IInd stage of the range-
reducer.
The driven pinion of IInd stage of the range-reducer (21) is freely rotating on two
bearings located in the body (20) installed in the boring of the rear wall of the GB housing
(27). The pinion (21) has an inner and outer gear rings, as well as cams located on its rear
end, which serve to synchronously drive the rear PTO. In the boring of the pinion (21), the
seat (18) with bronze bushing is fixed with a pin, which is the rear support of the inner
shaft (17). Outside on the pinion (21), the impeller (19) is fixed, which by intensive spray-
ing improves lubrication of the pinions of the final drive and the rear axle differential of the
tractor.
The 1st gear and reverse shaft (24) (Fig. 2) is installed on two ball bearings located
in the GB housing borings. In the front of the shaft (24) on splines, the sliding pinion (23) of
hill-climbing gears and reverse gears is installed. Backward movement of the sliding pinion
(23) up to meshing with the pinion (25) (Fig. 1) provides forward hill-climbing gears, and
forward movement up to meshing with the intermediate pinion of reverse motion (26) (Fig.
2) provides reverse gears. The intermediate reverse pinion (26) is installed on the axle
(25) and is freely rotating on it on a needle roller bearing. The pinion (26) is in constant
mesh with the smaller gear ring of the double-wheel gear (26) (Fig. 1).
*
Hereinafter, a position designation refers to the figure with the number indicated in paren-
theses immediately after the position designation; if such an indication of the figure is absent, the po-
sition designation refers to the last figure mentioned in the preceding text.