The Chelyabinsk Machine-Building Plant has been producing road equipment of the DZ series since 1978. During this time, changes have been made to the design several times. This is how the DZ-98 model was created, the technical characteristics of which indicate that it is the most powerful road equipment.

Purpose of technology

Grader DZ-98 is designed to form the profile of the site. Can be used on soils of different densities. It features a wide operating temperature range: from -45 to +40°C. There is a tropical version.

Motor grader DZ-98 is used:

• in construction;
• in repair work;
• for the formation of embankments;
• when preparing the foundation of the road;
• for profiling sites;
• when loosening the rock and the old coating;
• for snow and debris removal.

Main technical characteristics

The motor grader DZ-98 has the following specifications:

Name of indicator	Meaning
Height (m)	4
Width (m)	3,2
Length (m)	6
Max ground clearance (cm)	61,5
Maximum movement speed	47 km/h
R min turn	18 meters
Braking distance at v=30 km/h	14 meters
With circuit off	41 meters
Blade Angle	0–360°
Side extension of the blade from	102 cm
Moving the blade below the support surface	50 cm
Number of forward gears	6
Number of reverse gears	6

Motor graders DZ-98 can be made in 6 versions, which differ in the width of the wheels. Depending on this, some parameters differ:

motor grader

The DZ-98 grader is powered by a YaMZ-238ND2 diesel engine with a turbocharging system for 8 cylinders, YaMZ-240G for 12 cylinders, or Cummins. Both options are started using a starter. The crankshaft speed, at which the maximum power is 1.7 thousand revolutions per minute.

The maximum power of the YaMZ-238NDZ engine is 170 kW. For Cummins M-11C265 - 202 kW.

power transmission

Transmission unit - mechanical. It transmits rotation to the drive wheels. It is possible to disconnect from them, change direction and speed. Used for hydraulic pumps.

The power transmission assembly is connected to the motor flywheel. The rotation of the crankshaft is transmitted from the engine to the power transmission unit through a flexible coupling.

The brake used for parking or holding on a slope is a band brake. The clutch is dry, double disc.

Chassis

The wheel formula of the motor grader DZ-98 is 1*3*3. In this case, all bridges are leading.

Feature of DZ-98 motor graders: their middle and rear axles are interchangeable.

The axle shafts do not perceive the radial load from the wheels and are called unloaded. They can withstand significant loads.

To reduce the speed, a multi-disc wheel brake is used, the ceramic-metal discs of which are located inside the oil bath.

Suspensions of the middle and rear axles - balanced, with jet rods. They provide the movement of bridges in a vertical plane.

The front axle of the motor grader is driving and steered. This provides high traction on the blade, improved cross-country ability.

Its design is similar to the previous ones, the attachment to the main frame and the parts that turn the wheels are different.

Motor grader hydraulic system

Through the devices of the hydraulic system, the clutch, side blade, maneuvering and movement of the motor grader are controlled.

The system consists of 2 circuits in which gear pumps are installed. Hydraulic cylinders are used as actuators. The hydraulic motor can be installed in the blade turning mechanism.

Pneumatic system

The pneumatic system of the unit consists of two circuits. It allows you to control the wheel brakes and the lever for suspension of attachments. Service and emergency braking are independent of each other. Controls the pressure inside the system indicator light.

Motor grader control process

Management of systems and mechanisms is carried out:

• mechanically- gearbox, parking brake, front axle, reverse, multiplier;
• mechanically with hydroserving- clutch;
• hydraulically- turning the front wheels, attachments;
• pneumatically– wheel brakes.

Actuators of the unit

The main working body of the motor grader is a blade with a knife, which is fixed to the traction frame. It has the ability to rotate in a vertical and horizontal plane, move up and down. The dumping device can be taken out to the side.

Hinged track-laying mechanisms make the machine multifunctional. This:

• soil ripper;
• scarifying device for crushing dense soils and the previous road surface;
• bulldozer blade;
• side grader blade.

In winter, a special wing is installed on the dump, which throws snow to the side of the road. Using an additional side wing, drifts can be removed behind the fence. The front sheet at low speed shifts the snow to the side, and at high speed it scatters it for a dozen meters. As a result of such cleaning, no snow bank is formed along the road.

Bulldozer equipment is used for backfilling pits, making excavations. Soils of 1–2 categories are moved without preparation, 3–4 and frozen ones are pre-loosened.

The motor grader DZ 98 is a special technique that is used for earthmoving and profiling work in large volumes, in the construction and maintenance of roads on soils of 1-4 categories.

The manufacturer has provided in the configuration various attachments that significantly expand the technological capabilities of the DZ-98 grader. On the rear linkage, you can install a ripper-scarifier, with which the driver of the motor grader loosens the soil. An additional wing can be installed on the grader blade, which allows the snow mass to be thrown to the side of the road during snow removal. An additional side plow allows you to remove snow behind the fences.

All the main functions of the D3-98 motor grader are performed using a special working body, which is a blade with a knife mounted on the frame of the machine and driven by a diesel engine. They can perform the functions of lowering, lifting, turning in the vertical and horizontal plane.

This motor grader has excellent maneuverability and a change in the angle of the blade in the planes, and the blade can also be moved to the side.

In order to increase labor productivity and improve the working conditions of the operator in this technique, containing the main frame, balancers, an automatic control system for the position of the blade, a working body and proportional sensors. In addition, an additional sensor is mounted on the second balancer.

There is a large set of interchangeable working equipment for the motor grader (swivel dozer blade, side grader blade, rear ripper).

It is customary to start a review of technical data with the engine. DZ-98 is equipped with YaMZ-238NDZ, popular for Russian heavy equipment. It should be noted that the machine is available in two versions, one of which is equipped with a Cummins engine. Both engines are diesel.

Total information motor grader DZ-98
Motor grader class
Width (with blade in transport position), mm
Height (without flashing beacons), mm, no more
Longitudinal base, mm
Track of the front wheels of the motor grader, mm:
Narrow
wide
Track of the rear wheels of the motor grader, mm:
Narrow
wide
Ground clearance of the motor grader, mm:
under dump in transport position
under the front axle
under the rear axle
under the suspension of the middle and rear axles
Motor grader weight, kg: operational
attributable to the front axle
attributable to the middle and rear axles
Static load on the ground at operating weight, N (kgf):
on a blade mounted perpendicular to the longitudinal axis
on the teeth of a scarifier
Number of gears of the motor grader DZ-98:
when moving forward
when moving backward
Motor grader movement speeds at rated engine crankshaft speed, km/h:
when moving forward:
1st gear
2nd gear
3rd gear
4th gear
5th gear
VI transfer
when moving backwards:
1st gear
2nd gear
3rd gear
4th gear
5th gear
VI transfer
Minimum turning radius when driving on dry concrete surface, m
Slope of holding the motor grader by the parking brake, %, not less than
Braking distance of a motor grader moving at an initial speed of 30 km/h on a horizontal section of dry asphalt with the clutch disengaged, m, not more
Braking distance of a motor grader moving at an initial speed of 30 km/h when braking by an emergency system (in case of failure of one of the circuits), m, no more
DZ-98 engine
Type	diesel
Model	YaMZ-238NDZ Cummins M-11C265
Rated power, kW (hp)	173 (240) 202 (275)
Rated speed, rpm
Start	starter
Transmission
Type	mechanical, with all-wheel drive, with front axle disengagement mechanism
Hydraulic pump drive reducer	single row with flexible coupling
Clutch	dry, double-disk, permanently closed with hydroserving of its drive, with brake of the driven shaft
transfer gearbox	single row for driving middle and rear axles with parking brake
Parking brake	belt type
Intermediate gears to bridges	cardan
Chassis
Wheel formula
Drive axles
steerable bridge	front
Main gear axles	single-stage, conical, without differentials
Final drive axles	single-stage, cylindrical, with internal gearing
half shafts	fully unloaded type
Wheel brakes	multi-disc with cermet discs, working in an oil bath
Suspension of the middle and rear axles	balancing with jet rods, providing pumping of bridges in a vertical plane
Front axle suspension	hinged, providing pumping of the bridge in the transverse plane
Tire size, inch	16.00-24 or 20.5-25
Tire pressure, MPa (kgf/cm2)	0,23…0,28 (2,3…2,8)
Working equipment (Motor grader DZ-98)
track-laying
The volume of the drawing prism in the bulldozer position, m3, not less
Capture width of the blade in the track position, mm, no more
Blade height, mm, not less than
The main cutting angle for bulldozer position of blade wings
Blade wing angle back and forth from the bulldozer position in the plan, not less than
Bulldozer
Volume of drawing prism, m3, not less than
Blade width, mm, not less than
Blade height, mm, not less than
Lowering the blade below the supporting surface, mm, not less
Main blade cutting angle
Ripping
Number of teeth of ripping equipment
Maximum deepening of the ripper tooth equipment, mm, not less than
Width of capture of the ripping equipment, mm, not less
Grader Blade
Blade length, mm, not less than
Blade height with knives, mm, not less than
Cutting angle
Slope cleaning angle with a grip angle in the slope plane of at least 45°
Ditch depth, m, not less
slope of the inner walls	from 1:2 to 1:3
slope of the outer walls	from 1:1 to 1:1.5
Angle of installation in the horizontal plane, full-circle blade
The angle of the part-turn blade from the position perpendicular to the longitudinal axis of the motor grader DZ-98
Lateral extension of the blade in both directions relative to traction frame, mm, not less than
Dump lowering below the supporting surface, mm, not less than
Additionally
Control
Gearbox control, multiplier, reverse and front axle	mechanical
clutch control	mechanical with hydroserving
Front wheel steering	hydraulic
Brake control:
wheeled	pneumatic
parking	mechanical
Management of working bodies	hydraulic
electrical equipment
Voltage, V
Starter power, kW (hp)
Rechargeable batteries:
type
quantity
Filling capacity
Motor grader fuel tank, l
Engine cooling and heating system, l
Engine lubrication system, l
Grader hydraulic system, l
Gearbox, hydraulic pump drive gearbox, transfer gearbox, l
Main gear of rear, middle axles (each), l
Main gear of the front axle, l
Final drive axle, l
Wheel brake, l
Anti-freeze fuse, l
Blade rotation reducer, l
Technical and economic indicators
Consumption of the working fluid of the hydraulic system, g / hour, no more
Specific fuel consumption, kg/m3, no more
Reliability indicators
80% resource before the first overhaul, engine hours, not less
Mean time between failures, engine hours, not less
Technical utilization coefficient, not less than
Specific total operational labor intensity of periodic technical maintenance, electric hours / hour, no more
Operational complexity of the daily technical service, man/h, no more
Ergonomic indicators
Temperature at the driver's workplace, °C:
not less
at relative humidity 40-60%, not higher
at relative humidity 60-80%, not higher
for areas with an average air temperature at 13:00 hot month, exceeding plus 25 ° С, not higher
Efforts on the controls, N (kgf), no more than:
on the steering wheel when the motor grader DZ-98 is moving at a speed of at least 8 km / h on a horizontal section with a dry, hard, even surface
on the engine control pedal
on work equipment control levers used in each work cycle
on the control levers of the machine used when moving it under its own power
on brake pedals
on levers and pedals used no more than five times per shift
Equivalent sound level at the driver's workplace (after 300 hours of operation by the motor grader) dBA, not more than
Vibration hygiene standards and vibration performance requirements	according to GOST 12.1.012-90
Environmental indicators
The indicators meet the standards:
GOST 12.1.005-88	the level of gas contamination at the driver's workplace
GOST 17.2.2.02-86, GOST 24028-80	exhaust smoke
GOST 17.2.2.05-86, GOST 24585-81	emissions of harmful substances with exhaust gases

Some technical and economic indicators

• Fuel consumption DZ 98 - 0.15 kg / cu. m.
• Fuel tank capacity - 485 l.
• The hydraulic system of the machine holds 120 liters of working fluid.
• Working resource in engine hours (minimum) - 8400.
• The coefficient of technical application is not less than 0.85.
• Labor intensity - 0.95 people / h.
• Ergonomics - 14-31 degrees, depending on climate conditions.
• Environmental standard - GOST 12.1.012-90.
• Emission of exhaust gases and the level of smoke in the workplace comply with the standards of GOST 17.2.2-02.86 and 17.2.2-05.86.

Engine

YaMZ-238, mainly used as a power unit, belongs to the Euro-1 environmental class and has a long service life. Motor power is 240 hp / 173 kW. The rated speed of the crankshaft is 1700 rpm. The engine is started by a starter.

Cummins M-11C265 has a power of 275 hp/202 kW. Rated speed - 1700 rpm. Ecological class Euro-1. The engine is started using a starter. The specific fuel consumption of the motor grader DZ-98 in the minimum value is 220 g/kW*h (162 g/hp*h).

Gear box

The motor grader is equipped with a mechanical six-speed gearbox (6 forward and 6 reverse), which is considered one of its advantages. The peculiarity of heavy equipment lies in the areas and areas of its application. In difficult conditions, a mechanical transmission is preferable, as it gives a certain power reserve and more opportunities for equipment. The maximum driving speed is 41 km/h forward and 47 km/h reverse.

The gearbox is equipped with a drive to all four wheels and is complemented by a front axle disengagement mechanism. The transmission system is formed by:

• single-row hydraulic pump drive gearbox with flexible coupling;
• dry double-disc permanently closed clutch with hydroserved drive and output shaft brake;
• transfer box for driving the rear and middle axles with a hand brake;
• band type hand brake;
• intermediate cardan gears to bridges.

Chassis and suspension

The motor grader DZ-98 is equipped with a 1x3x3 wheel arrangement and three drive axles. The front axle is controlled and obeys the steering mechanism. The main gear is a conical single-stage. The design does not provide for differentials. Semi-axles of a fully balanced type, multi-disc brakes operating in an oil bath and made of sintered metal, and cylindrical single-stage side gearboxes of the axles together give amazing cross-country ability and power of the entire undercarriage system.

The suspension of the middle and rear axles are made with balancers in the form of jet rods, which provide vertical pumping of the axles. In contrast, the front axle has a hinged device that ensures its pumping in the transverse plane. So the machine acquires stability even under serious loads. The parking brake is able to hold the equipment at an angle of 15 degrees.

1- balancer; 2- bracket for fastening the balancer to the rack of the motor grader frame; 3- ball pin; 4- jet rod; 5- adjusting nut; 6- centering pin; 7- spacer bar; 8-emphasis; 9- cover of the ball bearing of the balancer; 10- adjusting shims; 11- stuffing box body; 12- axis of balancers; 13- balance shaft cover; 14- nut; 15- lock washer; 16- thrust washer with lock; 17- bushing; 18- fixed sleeve; 19- seal; 20- washer; 21- conical spring; 22- gasket; 23- clip; 24- rear axle; 25- adjusting pin of the rear axle; 26- ball joint

Frame

Welded construction of the head, main and rear pipes. The front axle, interchangeable executive equipment, ball-type traction frame support are fixed on the head part. The pipe of the main part has brackets for fastening the cardan, which transmits rotation to the front axle. The cavities of the pipe part serve as a brake air system receiver. Two spars are attached to the rear of the frame device. Modular mounting on the frame of attachments is allowed. Equipment suspension mechanisms are of the same type in design.

Hydraulic system

Through the devices of the system, the executive bodies, clutch, movement and maneuvering of the grader are controlled. Gear pumps are installed in two circuits of the hydraulic system, hydraulic cylinders are used as actuators.

A hydraulic motor can be used in the blade turning mechanism.

1- hydraulic steering wheel; 2- hydraulic motor; 3~ hydraulic cylinder of additional working equipment; 4- hydraulic cylinder for removal of the traction frame;
5- hydraulic cylinder for turning wheels; 6- hydraulic transition; 7.22 - blade control hydraulic cylinders; 9- filter; 10 - servomechanism; 11-pump NSh-71L; 12- pump NSh-50; 13.20 - pipelines; 14- breather; 15- valve; 16- hydraulic tank; 17- steering safety valve; 18- oil measuring ruler; 19- filler cap; 21 - distributor; 23- blade extension hydraulic cylinder

Pneumatic system

A two-circuit device that provides a drive for wheel brakes and a lever for suspension of traction frame equipment. The brake drive provides independent operating and emergency braking modes. Before starting the movement of the unit, compressed air is pumped into the receiver.

The pressure is controlled by a light alarm.

Equipment

A wide range of working equipment is provided for the DZ-98 motor grader. The customer has access to track-laying, bulldozer and ripping equipment, as well as a grader blade as standard. Aggregation occurs with a front or rear hydraulic system.

The width of the dump with track-laying equipment is 3400 mm, height - 950 mm. The cutting angle of the soil is 48 degrees. The volume of the drawing prism in bulldozer position is 3 m3. Lowering of the equipment below the supporting surface - at least 200 mm.

Bulldozer equipment has a blade width of at least 3200 mm. The volume of the drawing prism is 2.57 m3. Blade height is 970 mm. The main cutting angle is 55 degrees, lowering below the supporting surface is at least 110 mm. The ripper for the DZ-98 grader has 5 teeth, a maximum depth of 230 mm and a width of 1800 mm.

The grader blade is of greatest interest to buyers of the DZ-98. The length of the equipment is at least 4200 mm, the height with knives is at least 700 mm. The standard blade can operate at an angle of 30 to 70 degrees. The slope cleaning angle under standard conditions can reach 90 degrees. The blade extends laterally by at least 1050 mm relative to the side frame. The minimum lowering of the grader equipment below the ground is 500

dimensions

In the basic modification, the DZ-98 grader has the following dimensions:

• length - 10800 mm;
• width (dump in transport position) - 3220 mm;
• cabin height without flashing beacons - 4000 mm;
• longitudinal base - 6000 mm.

Track (depending on the type of tires chosen): front - 26222-2696 mm, rear - 2502-2576 mm. Ground clearance of motor grader:

• 350 mm - under the dump in the transport position;
• 615 mm - under the front axle;
• 440 mm - under the rear axle;
• 395 mm - under the suspension of the rear and middle axles.

The operating weight of the grader is 19,500 kg. The mass is distributed in the following proportions:

• on the front axle - 5660 kg;
• on the rear and middle axles - 13,850 kg.

The machine creates a static load on the ground:

• blade in a position perpendicular to the axis - 103 kN (10500 kgf);
• on the teeth of the scarifier - 45.4 kN (4630 kgf).

The maximum turning radius is 18 m. The braking distance on a horizontal section with a motor grader residual speed of 30 km/h does not exceed 14 m, and when braking by the emergency system - no more than 41 meters. The indicators were measured on a dry concrete surface.

Application

Due to its high power and productivity, the machine can work both in road and municipal construction, in irrigation and melioration systems. The equipment allows using the grader for loosening and excavation of soils from the first to the fourth grades. The technique is actively used in the construction of airfields and for the production of road works of the highest complexity.

Advantages:

1. Selection of a gearbox with a mode of operation through friction clutches.
2. Optional installation of transmission hydromechanical units is possible.
3. The full drive of the bridges ensures the use of the machine on soft ground, high traction on the dump device, and the preservation of direction when forming road ditches.
4. The semi-rotary moldboard allows adjusting the traction force of the unit by adjusting the amount of material gripping across the width without changing the vertical cutting parameter. Due to this, the number of passes is reduced, and the quality indicators of surface profiling increase.
5. Wheel brakes of multi-disc type do not require adjustments, are durable and reliable.
6. The steering column and operator's seat are adjustable, increasing driving comfort.

Control

The motor grader is controlled from an all-metal cab. Control devices are located on the shield under the roof. The sprung seat and steering column are adjustable according to the height of the operator.

The cabin is equipped with ventilation and heating devices. Circular glazing and lighting fixtures provide a good overview of the grading area.

The gearbox is switched by a lever, the front wheels and actuators are controlled by hydraulics, the wheel brakes are controlled by pneumatics.

Review

The progenitor of special equipment for planning and other work of the DZ-98 motor grader is the Chelyabinsk ChSDM plant, which began production of this class of units in 1978. Over the years of the plant's existence, several stages of modernization have passed, and today this is one of the few operating types of motor grader equipment, where the manufacturer of the DZ-98 grader has become a new plant of the JV "RM - Turks", which included the Chelyabinsk ChSDM plant.

Principal purpose and technical features of the machine

The main purpose of the DZ-98 grader is to carry out planning work for the design of the subgrade, and the soil can have a different working density of processing. The temperature regime of operation of the machines is from -45 C to +45 C, which allows us to say that the graders have proven themselves both in tropical conditions and in areas with a temperate climate. The manufacturer of the DZ-98 motor grader managed to introduce interesting ideas for the machine, which at that time were considered advanced in the territory of the socialist camp. At that time, no one produced analog equipment in the countries of Eastern Europe.

All main technical work on special equipment is carried out at the expense of the main executive body, which is the moldboard knife, which is attached to the attachments of the grader equipment. Attachments are easily raised to the maximum permissible level, lowered without problems, there are excellent data for turning in horizontal and vertical positions. High-quality control of the machine is carried out due to the hydraulic system, which indicates improved individual technical characteristics of the DZ-98 motor grader.

What is the purpose of the special equipment?

The main operation manual of the machine indicates the individual parameters of the machine, while it is recommended to use the technique for the following production purposes:

• Various categories of construction and repair work on the roads.
• Formation of the required base for the roadway; mode of movement of removed rock in the embankment.
• Tasks for the formation and planning of various embankments.
• Subgrade shifting mode, mixing ready-made soils, including those with additives.
• Rock loosening, including using the method of removing old worn asphalt pavement with the help of scarification.
• Profiling of special sections of the roadway.
• For carrying out snow-removal works of the general and individual mission.

Main technical data and parameters of the machine

Given the popularity of special equipment, specialists can see that the technical characteristics of the DZ-98 grader fully meet the requirements for operation and use when used for various earthworks.

Index	Value
Machine classification	250
Grader DZ-98 (width x height x length)	3220 x 4000 x 6000
Wheel track: narrow tires anterior wide tires anterior
Blade clearance	350 mm
Clearance for the first bridge	615 mm
Clearance for the second and third bridge	440 mm
Machine operating weight	19550 kg
Weight distribution option for 1 axle	5660 kg
Weight distribution option for 2 and 3 axles	13580 kg
Load impact on the soil blade blade chirker
Forward speed	Up to 35 km/h
Reverse speed	Up to 26 km/h
Permissible fuel	Diesel only
Modification of the used power plant of the machine	YaMZ-238ND2 Cummins M-11C265
General machine power parameters	173 kW at 1,700 rpm 202 kW at 1,700 rpm
Mains voltage	24 V
Starter device, power parameter	8.2kw
Rechargeable battery powered model

Power aggregate parameters of the machine

The Chelyabinsk manufacturer uses domestic power units of Yaroslavl production, which have the following modification - diesel engines for four cycles, V-shaped, eight-cylinder YaMZ-8482, YaMZ-238NDZ, YaMZ-238ND2 and twelve-cylinder YaMZ-240G. In a number of cases, in order to adapt the operation of the aggregate plant according to the declared parameters, where the fuel consumption per hour of the DZ-98 grader must correspond to the main parameters stated in the technical documentation, motors from the Ural manufacturer, known as U1D6-TK-S5, are used. Good test results for fuel consumption per 100 km of the DZ-98 motor grader are indicators of power plants made in the USA, in particular from Cummins, the serial model range M-11C265. Free access to the power plants is provided by the implementation of an interesting version of the hood from the casing. Under the hood there is also an advanced air cleaning device system, which, together with the gas exhaust muffling system, is located in the lower part of the hood. An additional device for the technical characteristics of the DZ-98 grader on the YaMZ-238ND2 power plant affects the direct fuel injection mode, which in turn is equipped with a turbocharging mode.

Transmission characteristics

The machine is provided with a mechanical system of the unit device, which transmits the torque mode to three bridges simultaneously, while it is allowed to turn off the cardan part of the first control bridge of the DZ-98 motor grader. On the middle, as well as on the rear axle, the drive mode is carried out using an intermediate type of cardan, which functions directly from the distribution gearbox for the 1-row type, together with a belt-type parking brake.

In turn, additional technical units, in particular the gearbox, as well as the clutch mechanism, gear components for the active drive of the hydraulic pump system are combined in a complex section of the block, they also have a conditional unified and common lubrication complex control system.

The gearbox has a universal multiplier type of execution, where the control mechanism is allowed for 6 main parameters and torque values ​​for the forward and reverse mode.

The clutch for the motor grader is dry type, which indicates the presence of a hydraulic servo for shutting down the machine.

Additional control systems

Given the high popularity of the machine, the following features of the machine's control components should be noted.

Frame. It has the appearance of a welded type of execution, with the presence of the head part of the universal pipe of the main type of execution and the rear part. Modular connection of common units of attachments is allowed on the frame.

wheel formula. It works according to the standard principle of the formula 1 x 2 x 3, which indicates that each axle of the machine is the leading one, and the front axle has a controlled mode of operation.

Hydraulic system. Through this optional mode, the integrated control of all the final control elements of the grader unit is performed. The design also uses a hydraulic motor.

Pneumatic system. It has a double sided version. Before the unit starts moving, air is pumped into the receiver. Pressure control is carried out by light signaling

Control. The unit is controlled directly from the operator's cabin, which is equipped with the maximum comfort and convenience, which indicates the possibility of full control of complex equipment designed to carry out technological work of any level of performance related to soil and earthen material.

The manufacturer also produces additional series of special equipment, which have one distinctive characteristic - they use special power plants, usually from the Yaroslavl manufacturer, and partly from the Ural manufacturer. In Russia, there are up to 70 specialized centers that carry out repairs and maintenance of the machine, according to the technical documentation of the main manufacturer ChSDM.

Video: Motor grader DZ-98

Motor grader (grader) DZ-98.

Photo Motor grader (grader) DZ-98.

When building new roads, builders very often use heavy motor grader DZ-98, which is able to effectively carry out work on moving large volumes of soil and level the subgrade with high accuracy. The front blade of the grader is rotatable, which allows for preliminary leveling of the working platform in a minimum of time. The grader 98 is equipped with a diesel engine of the Yaroslavl Motor Plant, with a power of 173 kW.

The manufacturer has provided in the configuration various attachments that significantly expand the technological capabilities of the DZ-98 grader. On the rear linkage, you can install a ripper-scarifier, with which the driver of the motor grader loosens the soil. An additional wing can be installed on the grader blade, which allows the snow mass to be thrown to the side of the road during snow removal. An additional side plow allows you to remove snow behind the fences.

The motor grader DZ-98V has some differences from the base model. It can optionally be equipped with any of the six proposed engines with a power of up to 220 kW, including imported ones. In addition, the DZ-98V grader has a leading front axle, it is possible to adjust the steering column for a specific driver, and the blade can be turned while driving under load. In a complete set various types of the hinged equipment.

There are many machines of this series in operation, so the manufacturer strives to ensure the availability of spare parts in all regional warehouses. Spare parts for the DZ-98 motor grader are always available from dealers in a full range. This approach allows repairing motor graders in the shortest possible time, and "branded" spare parts guarantee the reliability of the equipment after maintenance and overhaul.

Grader class - 250

Width, mm - 3220

Height (without flashing beacons), mm, - 4000

Longitudinal base, mm - 6000

Front wheel track, mm: narrow - 2622. wide - 2696

Rear wheel track, mm:

Narrow - 2502

Wide - 2576

Ground clearance, mm:

Under the knife in transport position - 350

Under the front axle - 615

Under the rear axle - 440

Under the suspension of the middle and rear axles - 395

Motor grader weight, kg:

Operational - 19500

Attributable to the front axle - 5660

Attributable to the middle and rear axles - 13850

Static soil load at operating weight, N (kgf):

On a blade mounted perpendicular to the longitudinal axis - 103000 (10500)

On the teeth of the scarifier - 45400 (4630)

Number of grader gears:

When moving forward - 6
when moving backward - 6

Grader movement speeds at rated engine crankshaft speed, km/h: when moving forward:

1st gear - 3.5

II gear - 5.51

III gear - 9.75

IV gear - 14.1

V gear - 22

VI transfer - 41

When moving backward:

1st gear - 4.22

II gear - 6.64

III gear - 11.72

IV gear - 16.9

V gear - 26.6

VI transfer - 47

Minimum turning radius when driving on a dry concrete surface, m - 18

Slope of holding the grader with a parking brake, %, not less than - 15

Braking distance of a grader moving at an initial speed of 30 km / h on a horizontal section of dry asphalt with the clutch disengaged, m, no more than - 14

Braking distance of a motor grader moving at an initial speed of 30 km/h when braking by an emergency system (in case of failure of one of the circuits), m, not more than - 41

grader engine

Type - Diesel

Model - YaMZ-238NDZ

Rated power, kW (hp) - 173 (240)

Rated speed, rpm - 1700

Start - Starter

Transmission

Type - Mechanical, with all-wheel drive, with a front axle disengagement mechanism

Hydraulic pump drive gearbox - Single row with flexible coupling

Clutch - Dry, double-disk, permanently closed with hydroserving of its drive, with a brake of the driven shaft Transfer gearbox - Single-row for driving the middle and rear axles with a parking brake

Parking brake - band type

Intermediate gears for axles - cardan

Chassis

Wheel formula - 1x2x3

Drive axles - two

Steered Axle - Front

Main gear - Single-stage, bevel, without differentials

Final drives - Single-stage, cylindrical, with internal gearing

Axles - Fully floating type

Wheel brakes - Multi-disc with sintered discs, working in an oil bath

Suspension of the middle and rear axles - Balancing with jet rods, providing axle pumping in a vertical plane

Front axle suspension - Articulated, providing pumping of the axle in the transverse plane

Tire size, inch -16.00-24 or 20.5-25

Tire pressure, MPa (kgf/cm2) - 0.23...0.28 (2.3...2.8)

Working equipment:

track-laying

The volume of the drawing prism in the bulldozer position, cubic meters - 3.03

Knife grip width in track-laying position, mm - 3400

Blade height, mm - 950

The main cutting angle with the bulldozer position of the wings, degrees - 48

Angle of installation of the wing back and forth from the bulldozer position in the plan, degrees - 24

Lowering the knife below the supporting surface, mm - 200

Bulldozer

The volume of the drawing prism, cubic meters - 2.57

Working area width, mm - 3200

Height, mm - 970

Lowering the knife below the supporting surface, mm - 110

The main cutting angle, hail - 55

Ripping

Number of teeth of ripping equipment - 5

Maximum depth of the ripping equipment tooth, mm - 230

Capture width of ripping equipment, mm - 1800

Grader equipment

Knife length, mm - 4200

Blade height with knives, mm - 700

Cutting angle, degrees - 30-70

Slope cleaning angle at a capture angle in the slope plane of at least 45 degrees, 0-90, cuvette depth, m - 0.5, slope of the inner walls - from 1:2 to 1:3, slope of the outer walls - from 1:1 to 1:1.5

Installation angle in the horizontal plane, degrees -0-360

Lateral extension of the knife in both directions relative to the traction frame, mm - 1050

Lowering the knife below the supporting surface, mm - 500

Control

Gearbox, multiplier, reverse and front axle control - Mechanical

Clutch control - Mechanical with hydraulic service

Front wheel steering - Hydraulic

Brake control:

Wheeled - Pneumatic

Parking - Mechanical

Control of working bodies - Hydraulic

electrical equipment

Voltage, V - 24

Starter power, kW (hp) - 8.2 (11.2)

Rechargeable batteries: type - 6ST-190A quantity - 2

Filling capacity

Fuel tank, l - 485

Engine cooling and heating system, l -87; 50

Engine lubrication system, l - 50; 32

Hydraulic system, l - 120

Gearbox, hydraulic pump drive gearbox, transfer gearbox, l - 35

Main gear of rear, middle axles (each), l 7

Main gear of the front axle, l - 15

Final drive, l - 8.6

Wheel brake, l - 3.6

Fuse protection, l - 0.2

Blade rotation reducer, l - 3

Technical and economic indicators

Consumption of the working fluid of the hydraulic system, g / hour, no more than - 7.06

Specific fuel consumption, kg / m3, - 0.15

Reliability indicators

80% resource before the first overhaul, hours, not less - 8400

Mean time between failures, engine hours, - 200

Technical utilization coefficient - 0.85

Specific total operational labor intensity of periodic maintenance, man-hours / hour - 0.118

Operational labor intensity of shift maintenance, man/h, not more than - 0.95

Ergonomic indicators

Temperature at the driver's workplace, degrees: not lower than - +14

At relative humidity 40-60%, not higher - +28

At relative humidity 60-80%, not higher - +26

For areas with an average air temperature at 1 p.m.

Hot month, exceeding plus 25 ° С, not higher - +31

Efforts on the controls, N (kgf), no more than:

On the steering wheel when the motor grader is moving at a speed

At least 8 km / h on a horizontal section with a dry, hard, even surface - 115 (11.75)

On the engine control pedal - 50 (5.2)

On work equipment control levers used

In each work cycle -60(6.15)

On machine control levers used when moving

Her own move -120(12.5)

On brake type pedals - 200(22)

On levers and pedals used no more than five times per shift - 200(22)

Equivalent sound level at the driver's workplace

(after 300 motor hours run by the motor grader) dBA, not more than - 82

Environmental indicators

The indicators meet the standards:

GOST 12.1.005-88 The level of gas contamination at the driver's workplace;

GOST 17.2.2.02-86, GOST 24028-80 Smoke content of exhaust gases;

GOST 17.2.2.05-86, GOST 24585-81 Emissions of harmful substances with exhaust gases.

Interchangeable working equipment:

Bulldozer

Ripping

Kirkovochnoe

snow plow

track-laying

Brief technical characteristics of the motor grader DZ-98V.

For reference - DZ-98V is a modernization of the DZ-98 grader

Operating weight, kg
Engine power, kW
Forward speed, km/h
Engine model	YaMZ 238ND3, Cummins M-11C265
Grader blade length, m
Grader blade height, m
Overall dimensions, mm	11000/ 3064/ 4000
Number of forward/reverse gears
Transmission type	mechanical
Wheel formula
The angle of the cut slope, hail
Interchangeable working equipment	Blade bulldozer rotary; snow plow front swivel; rear ripper-scarifier; front scarifier; side blade for snow removal behind fences; side blade for expanding the zone of snow removal from the road, roadsides
Turning radius, m
Design features	Imported engines with low fuel consumption. Four-wheel drive