Bulldozer Komatsu D375A-5 technical specifications, price, photo and video

For questions regarding the purchase of this equipment (Komatsu D375A-5 crawler bulldozer), terms of credit and leasing, service and warranty, please contact the factory dealers or official representative offices. Delivery of Komatsu D375A-5 crawler bulldozer can be carried out either directly from the manufacturer or from sites in Moscow and other regions of the Russian Federation.

Video

Like most models of the Japanese brand, Komatsu 375 is equipped with a wide range of additional equipment. This ensures year-round use of the bulldozer and increases its profitability. The Komatsu D375A combines optimal weight distribution, robust design and high performance. This is facilitated by high-quality elements, most of which are the Japanese brand’s own development.

The Komatsu 375 bulldozer is used in many countries around the world. In the CIS countries, the model gained the greatest popularity in the North-Eastern regions of Russia. The main gold mining enterprises are located here, performing large volumes of excavation work. To function effectively, they need special equipment of this class. These organizations account for up to 70% of the entire fleet of Komatsu D375A bulldozers operated in the North-East of Russia. A reliable and powerful bulldozer with advanced technical capabilities is optimally suited for these areas.

Among the advantages of the Komatsu 375 model are:

unusually low profile, ensuring maximum stability of the equipment on any surface;
economical and environmentally friendly Komatsu SA6D170E engine with a built-in cooling system and a power of 535 hp;
easy maintenance due to good protection of all hydraulic pipelines, modular design of the power transmission and grouping of key components;
large blade;
single-tooth ripper with an adjustable ripping angle;
good grip on the ground, which is achieved through the K-shaped carriage system;
disc brakes that do not require additional maintenance.

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New generation of bulldozers D375A KOMATSU

KOMATSU, in accordance with the modernization program for its bulldozers, has released a new generation model D-375A series 3 in the weight class of 70 tons. The new model is 1.5 tons heavier than its predecessor D 375A-2. Improvements affected the engine and cab mountings, chassis system, working parts, control system, etc.

The D 375A-3 bulldozer is equipped with a low-emission KOMATSU SA6D170E engine, which has direct injection and turbocharging with subsequent cooling to save fuel. The engine power is 392 kW at a rotation speed of 1800 min-1, and the torque is 267 kg m. To reduce noise and vibration levels, the engine is mounted on the main frame on rubber shock absorbers. When operating at an altitude of up to 3 thousand meters above sea level, no change in fuel supply adjustment is required.

At second speed, the engine allows you to develop a tractive force of 54 tons, which characterizes the bulldozer as a powerful productive machine, perfect for mechanical loosening and moving rock mass. High productivity is also achieved thanks to the installation of more powerful dumps with increased (by 6-7%) capacity, which is 18.5 m3 for a hemispherical blade, and 22 m3 for a spherical one.

In order to increase the maximum filling of the blade and increase the productivity of the bulldozer, the optimal cutting angle of the blade is selected during operation depending on the type of rocks and the slope of the seams being mined. Compared to a conventional blade rotation system, the rotation speed and installation angle on the new model are 2 times higher.

To effectively move non-cohesive rocks over long distances when increased power is required, the LOCKUP automatic locking system is used, which allows you to automatically turn on and off the torque converter depending on the speed of rotation of its shaft.

The new elastic balanced undercarriage system REU (Resilient equalized undercarriage), including an x-shaped swing suspension of road wheels with rubber cushions, provides excellent traction of the track shoes with uneven ground surfaces, and also reduces vibration and dynamic impact from impacts when hitting rocks. Rubber shoes always follow the contours of the ground. When moving the machine on a flat surface, the running trolley functions like a regular trolley with a rigid frame - x-shaped suspensions do not have softening properties due to the low compression of the rubber cushions. When moving a bulldozer over an uneven surface, rubber cushions are subjected to strong compression during shock loading, reducing its impact on the suspension. As a result, the durability of parts increases and the operator’s comfort during work improves.

Thanks to the low engine location and low chassis, the new bulldozer has greater dynamic stability.

The machine is controlled while moving using one lever (joystick), unlike the old model, which used two levers - one to control the turn, the other to control the speed and direction. To facilitate the driver's working conditions and reduce his efforts on the blade control lever, a proportional pressure control system in the hydraulic system (PPC) is used. On the new model D-375A-3, the forces on the controls are reduced by 2.2-2.3 times.

The new hexagonal cab design provides excellent visibility - a viewing area 5% larger than the D-375A-2. The operator's seat can be rotated and locked in two positions. This allows the operator to set the seat for better visibility and perform loosening work without getting up from the seat. As a result, the driver of the D-375A-3 bulldozer has a better (3%) view of the ripper than on the previous model.

Air filters are installed to prevent dust from entering the cabin, and excess pressure is created inside it.

The cabin is installed on three shock absorbers, and not on rubber cushions like the D-375A-2 bulldozer. Together with the REU elastic track roller suspension system, this reduces vibration levels (by 5%) and noise.

For simplified and convenient servicing, the transmission and torque converter filters are located near the transmission oil level indicator, and quick connects for measuring hydraulic pressure are centralized on a separate panel. The tiltable radiator makes it easy to clean. The hydraulic system pipeline of the blade rotation cylinders is protected from external damage due to the fact that it is completely located in the bulldozer frame.

The unique modular design of the transmission allows parts to be replaced without losing hydraulic fluid.

The new bulldozer has an improved system for monitoring the condition of the machine’s components and assemblies, which allows faults to be identified at an early stage and emergency situations to be prevented. Deviations are recorded on a liquid crystal monitor panel located in the driver’s cab.

Bulldozers branded D-375A KOMATSU operate in many regions of the world. The largest market in the CIS for these machines is the North-Eastern regions of Russia, where the main Russian gold mining enterprises are concentrated, where half of the country's annual gold production is mined. Most of the enterprises are part of the three largest companies - Severovostokzoloto in the Magadan region, as well as Aldanzoloto and Indigirzoloto in the Yakutia-Sakha Republic. These companies account for 70% of the fleet of all D-375A bulldozers operating in the Northeast of the country.

The Severostokzoloto company and the KOMATSU company have been cooperating since 1972, when the company received an experimental model of the D-355A bulldozer in the northern version. Currently, the company's bulldozer fleet consists of 36 D-375A machines of the first and second generation. The first D-375A-1s were delivered in 1987, followed by the D-375A-2s in late 1990. All machines are still in working order.

Working conditions are extremely difficult - in winter the air temperature drops below -50°C, and the soil is permafrost. Starting a bulldozer engine at this temperature requires a lot of effort and time. To maintain normal operation of the bulldozer, parts and components in the northern version are used - a heater, a radiator fan with rotation in two directions, a heated cabin with double glazing.

Despite the harsh conditions, bulldozers work around the clock. The annual working time of each of them exceeds 5 thousand hours. Manufacturers appreciated the superiority of KOMATSU machines, and therefore the Severostokzoloto company purchased eight more D-375A bulldozers in 1996.

Magazine "Mining Industry" No. 4 1996, p.

Modifications and features

Komatsu D375A is a series of crawler bulldozers that can be operated on rough terrain or off-road.

The family includes several modifications:

Komatsu D375A-2;
Komatsu D375A-3;
Komatsu D375A-5;
Komatsu D375A-6;
Komatsu D375A-8.

They have a similar design, but differ in power plant power, weight, blade volume and some other characteristics.

All models in the series are characterized by a relatively small turning radius, which increases maneuverability, and high ground clearance. Wide caterpillar tracks with heavy-duty lugs increase the maneuverability of the equipment. The Komatsu D375A family features a pressurized, double-glazed cab with operator protection, sun visor and powerful headlights.

Features of the Komatsu D375A-5 model:

low profile for maximum stability;
excellent traction due to the use of K-shaped carriages;
economical and powerful motor SA6D170E;
maintenance-free disc brake system;
single-tooth ripper with an adjustable ripping angle;
spacious dump;
simplified maintenance due to the grouping of main components and additional protection of individual elements.

Features of the Komatsu bulldozer

This is a universal, multifunctional tracked vehicle with a powerful engine, which at one time received improved (even at the basic level) equipment.

Features of Komatsu D375A-5 bulldozers:

Bulldozer Komatsu D375A-5

low profile and low ground clearance;
single-shank ripper in the rear;
maintenance-free wet disc brake system;
blade with adjustable angle;
sealed hydraulic system pipelines;
improved traction due to K-shaped undercarriage carriages;
thoughtful layout and placement of main technical components that simplify system maintenance;
driver's seat with left armrest adjustable in height and position.

The crawler bulldozer is equipped with a hydromechanical transmission. Gearbox lubrication is forced, under high pressure. The engine is mounted and supported on the frame via rubber mounts, which reduces noise, vibration and improves driver comfort.

Viscous dampers are used for additional shock absorption of the cabin. The cabin air intake is located at the rear of the hood, where the least amount of sand or dust is concentrated. Upon special request, the bulldozer is equipped with an air injection system that maintains excess internal pressure, which completely prevents air from entering the driver's cabin.

Transmission Komatsu D375A-5

Additional items

The cabin itself has good visibility and comfort. The machine control is as computerized as possible, the main information is displayed on a multifunctional liquid crystal monitor.

Operator's workstation of the Komatsu D375A-5 machine

Control is carried out using a joystick and pedals. To simplify turns and increase maneuverability, the onboard clutches and brakes are virtually one piece. The long track with seven track rollers allows the bulldozer to climb steep slopes with confidence. The lugs of a modernized design prevent rolling.

Instead of a single-shank ripper, a multi-shank ripper can be installed. The type of front blade also changes depending on the customer’s wishes - hemispherical with a volume of 18.5 cubic meters or spherical with a volume of 22 cubic meters.

And also a feature of this line of Komatsu crawler bulldozers is the modular layout of the main components, which simplifies access to power and chassis units for their maintenance and repair.

Operator's workplace

Comfortable working conditions for the operator

Creating comfortable working conditions for the operator is the key to safety and high productivity of his work. Bulldozer

D375A-5

It is equipped with a low-noise cab design that creates a quiet, comfortable working environment for the operator, allowing him to focus his attention on the job.

Newly designed pressurized cabin

(installed upon request)

The newly designed cab and large tinted glass windows provide excellent visibility in all directions.
The use of air filters and the creation of excess air pressure inside the cabin prevents dust from entering the cabin.

New viscous damping cab mounts and chassis

with K-shaped

carriages increase operator comfort while the machine is moving

When installing a bulldozer

D375A-5

Viscous damping supports are used to improve shock absorption and effectively absorb shock and vibration loads. Cab damping mounts and a new K-carriage chassis reduce shock and vibration when the machine travels over uneven terrain that is not possible with a conventional cab suspension system.

Fresh air intake at the rear of the engine hood

The opening for supplying fresh air to the air conditioner has been moved to the rear of the engine hood, where dust concentration is minimal. As a result, the air in the cabin is always clean. The time interval before the next filter cleaning has been significantly increased, and the use of a new filter element design makes it easier to clean and replace.

Ease of maintenance

Preventive Maintenance

Preventive maintenance is the only sure way to ensure the longevity of your equipment. Taking this into account, the design of the D375A-5

Developed by
Komatsu
, service points are conveniently located so that necessary inspections and maintenance can be carried out quickly and easily.

Grouped service points

For ease of maintenance, the transmission and torque converter oil filters are located next to the power train oil level gauge.

Hydraulic piping protection

The blade skew control hydraulic cylinder hoses are fully mounted in the pushbar to ensure they are protected from damage by the material being moved.

Modular design of power train components

The modular powertrain components are sealed for easy removal and installation, avoiding oil spills, and easy maintenance.

Check points for checking oil pressure

Test points for checking oil pressure in power train components are grouped, facilitating quick and easy diagnostics.

Maintenance free disc brakes

Wet disc brakes require less maintenance.

Low maintenance costs

New track link design

The new
D375A-5
links retain the pins in the bushing due to a tight pin fit and a wedge-shaped retaining ring. On a conventional track, the fingers are held in the bushing only due to a tight fit, carried out with a large pressing force. On new links, this force is divided into the holding force of the locking ring and the tension force. This makes link maintenance and pin damage easier by making it easier to separate the pins and bushings. The result is increased undercarriage life and reduced maintenance costs through reduced link wear, pin reuse, and reduced pin and bushing installation labor.

To view a larger image of the diagram, follow this link.

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DESCRIPTION AND PURPOSE

Komatsu D375A-5 is a heavy crawler-type bulldozer that combines a reliable design, a comfortable cabin and excellent performance. The model belongs to the weight category “70 tons”. Production of the Komatsu D375A-5 lasted from 1993 to 2009. This bulldozer has become widespread on the Russian market.

A wide range of additional equipment is available for the Komatsu D375A-5, allowing you to use the machine all year round. Due to this, high profitability is achieved. High-quality Japanese elements and thoughtful design provide a long service life.

Komatsu D375A-5 is used to perform various tasks in the areas of the national economy and industry:

moving large volumes of materials and soil over short distances;
soil removal;
uprooting trees and stumps;
filling in depressions and erecting dams and dams;
surface leveling;
creation of dirt roads;
profiling of embankments.

The bulldozer is used in a different temperature range (from -40 to +40 degrees).

Chassis

The transmission of the Komatsu D375A-5 crawler bulldozer is Torqflow, of our own production. Equipped with a gear shift lock lever and a neutral position lock disabling function.

In this model of crawler bulldozer, compared to its predecessors, the vertical displacement of the road wheels has increased, due to which the chassis has become more resistant to the perception of shock loads, and its service life has increased significantly.

Caterpillars have a special type of fastening of tracks (links). The classic track fastening using a pin and bushing is complemented by a locking ring, which has practically reduced the likelihood of accidental disintegration of the track to zero, but has simplified the separation of the tracks when dismantling the system for repairs.

Chassis Komatsu D375A-5

Modifications

The equipment is equipped with a reliable hydromechanical gearbox. It's called TorkFlow. The operator controls the equipment using a small joystick with many functions. It changes the speed level and direction of movement of special vehicles.

If we compare Komatsu modifications with other famous brands, the smooth turning of this bulldozer is much better than other models. Engineers have achieved improvements in handling by installing a passive track braking system.

The advantage of the D375A-3 and D375A-5 modifications is that the transmission is quite easy to maintain. All components and other attachments can be replaced without losing a drop of hydraulic oil. And this can be considered a big plus, since repair work in such vehicles constantly requires a complete replacement of the fluid.

It's also fairly easy to check and replace the transmission filter and hydraulic transformer.

For example, the Komatsu D375A-5 series modification is equipped with a new REU chassis system. It is characterized by unique elasticity. The track rollers are mounted on an oscillating suspension and rubber cushions. This allows the shoes to grip well on any type of soil. An additional advantage is that such a chassis reduces vibrations to a minimum. On high-quality road surfaces, the X configuration suspension behaves very softly due to the fact that the cushions have a low compression ratio. And when the bulldozer drives onto the ground, rubber components significantly reduce the impact load. Due to this design solution, the service life of the suspension as a whole has become significantly longer.

In addition, you can often find the D375A-6 package.

Hydraulics

Hydraulic cylinders KOMATSU D375A-5

The hydraulics of the Komatsu crawler bulldozer of this modification have a maximum flow level of 405 liters per minute. Hydraulic cylinders are piston, double acting.

A volume of 120 liters of fluid is allocated to control the front blade. A single-shank ripper requires 70 liters, and various versions of a multi-shank ripper require 44 to 70 liters. The fixed angle mechanism requires less volume of special fluid. To change the angle of the ripper, a system with a hydraulic finger is used. The multi-tooth (multi-post) version is controlled by a parallelogram hydraulic drive using a lever system.

The torque converter is located next to the main elements of the transmission to simplify access to both mechanisms.

The total weight of the valve body without fluid is 11.79 tons. All elements of the system were developed and manufactured in-house by Komatsu.

SPECIFICATIONS

Dimensions:

length with a hemispherical blade and single-tooth ripper - 10330 mm;
width – 2500 mm;
height along the edge of the exhaust pipe – 4035 mm;
height at the top of the cabin – 4230 mm;
track base – 3840 mm;
ground clearance - 610 mm.

The curb weight of the Komatsu D375A-5 is 49,800 kg, the operating weight (hemispherical blade, single-tooth ripper, ROPS design) is 66,985 kg.

A wide range of devices are available as bulldozer equipment:

hemispherical blade with variable tilt angle (basic equipment);
spherical blade with variable tilt angle;
double skew blade;
spherical blade with double skew.

Equipment parameters

(hemispherical blade/spherical blade/double skew blade/spherical double skew blade):

width – 4695/5140/4695/5140 mm;
height – 2265/2265/2265/2265 mm;
maximum lift level above the surface – 1660/1660/1660/1660 mm;
maximum lowering below ground level – 715/715/715/715 mm;
skew angle adjustment – 1065/1165/1150/1260 mm;
blade weight – 10490/11740/10860/12110 mm;
dump capacity – 18.5/22/18.5/22 cubic meters;
total length of the bulldozer with a blade without a ripper – 7635/8000/7635/8000 mm;
ground pressure with a blade without a ripper - 140/143/141/143 kPa.

The rear bulldozer equipment uses a single-shank parallelogram ripper with adjustable ripping angle and a multi-shank ripper with adjustable ripping angle.

Ripper parameters (single-shank/multi-shank):

weight – 5470/6720 kg;
maximum lifting height – 1060/1050 mm;
maximum penetration into the ground – 1435/1075 mm;
working beam length – 2854/1367 mm;
increase in ground pressure – 12/14 kPa.

Refill containers:

fuel tank – 1050 l;
engine cooling system – 165 l;
engine lubrication - 55.5 l.

ENGINE

The Komatsu D375A-5 is equipped with a 6-cylinder Komatsu SA6D170E diesel engine with in-line architecture, liquid cooling, turbocharging and direct injection. The motor is mounted on the main frame using rubber cushions to reduce vibration and noise levels. Changing the fuel system settings when operating equipment at different altitudes is not required. Temperature changes also do not affect engine operation.

The Komatsu SA6D170E unit is unpretentious and can operate even on low-quality fuel. The bulldozer's fuel tank has a special pressure control valve and a breather filter, which additionally protects the power plant from dirt.

Komatsu SA6D170E engine characteristics:

volume – 23.15 l;
power – 391 (532) kW (hp);
rotation speed – 1800 rpm;
maximum torque – 2618 Nm;
cylinder diameter – 170 mm.

Features that Affect Performance

Engine

Engine SA6D170E

from
Komatsu
develops a net power of 391 kW (525 hp) at an engine speed of 1800 rpm.
This economical engine, combined with the heavy weight of the machine itself, makes the D375A-5
a high-quality tool for loosening hard rock and dozing work.

The engine is equipped with direct fuel injection, turbocharging and charge air cooling systems, which maximizes fuel efficiency.

The engine is mounted on the main frame using rubber mounts, which reduces noise and vibration. For convenience, it is provided that changing the operating altitude above sea level does not require changing the fuel system settings.

K-carriage system

The new chassis, equipped with K-shaped carriages, while maintaining the advantages of the previous design, has new advantages.

Characteristics of the chassis of the previous design:

The caterpillar tracks have a sufficient length of the supporting surface. Shoe slippage is minimized, resulting in reliable traction.
The idler wheel does not wobble under load, providing excellent machine stability. The force on the blade and ripper remains unchanged, which increases productivity.

New properties of the running gear with K-shaped carriages:

The K-carriages swing on two supports, and the vertical displacement of the track rollers has increased significantly. Due to the constant contact of the track rollers with the caterpillar belt, shock loads on all components of the chassis are reduced and, accordingly, their service life is increased.
The durability of the undercarriage has increased due to improved control of the alignment of the caterpillar track with the road wheels.
Operator comfort has increased while the machine is moving by reducing vibration and softening shocks when moving over uneven terrain.