The Komatsu PC400-7 crawler excavator was developed as the flagship model of the Japanese manufacturer. Special equipment is designed to perform a wide range of operations and is designed for any, including extreme environmental conditions. The model retains all the traditional properties of Japanese special equipment, it provides a significant level of comfort and safety for the operator.
Appointment and attachment
It is a crawler excavator that is designed for a range of operations. In particular, it applies to:
- quarrying;
- digging trenches, ditches and ditches;
- filling grooves;
- erection of embankments;
- carrying out loading of bulk cargo, as well as their unloading.
In this case, the model has the following limit indicators for performing various operations:
- maximum cutting height of the soil - 10.2 meters;
- the highest unloading height - 7 meters;
- permissible digging depth - 6845-8445 mm;
- excavator working radius - 11-12, 5 meters.
The attachment equipment of the Komatsu PS400-7 excavator is a bucket, grab or ripper. It is also possible to install other working bodies, including:
- gripper for pallet materials;
- hammer and drill (hydraulic equipment);
- rammers and plungers (referred to as vibration devices).
Special equipment has the following dimensions and weight:
- length - 11905-11995 mm;
- width - 3340-3440 mm;
- height -3265 mm to the top of the cab and 3635-3885 to the extreme point of the boom;
- burly clearance - 555 millimeters;
- weight of special equipment in the range of 41-44 tons.
Cabin
The crawler excavator cab has been improved over comparable designs.
The interior volume is 14% more than before, making the operator's presence inside the structure significantly more comfortable than before. It is possible for him to lean back and take a completely horizontal position.
The Komatsu PC400-7 developers have taken care of safety, the cab is equipped with both a guardrail to protect the operator and an additional top guard that can be installed at will.
Also, the space is protected from external hum, this is a low-noise design, as a result of which significantly less decibels reach the operator, including when the structure itself turns, unloads or its power plant operates. The more sealed cab also prevents dust from entering the interior. In addition, the structure is equipped with a damper that reduces the level of vibration that reaches the operator's chair.
The seat and levers inside the cab of special equipment have a double-type sliding mechanism, which makes it possible to adjust the position of the seat and levers of Komatsu PS400-7 either synchronously or separately. This allows the employee to install the controls for special equipment in such a way that it is most convenient for him. The control levers themselves are multi-position and are characterized by proportional pressure, which allows the operator to perform all actions of the crawler excavator with maximum accuracy.
Specifications
The crawler excavator is equipped with an engine of the same brand with the SAA6D125E-3 index. It is an in-line unit with six cylinders with a diameter of 125 millimeters. Its working volume is 11.04 liters. The power of the Komatsu PC400-7 engine is 347 horsepower (which is equivalent to 259 kilowatts), this figure it develops at 1850 rpm. The torque of the unit is 1570 Newtons per meter, this figure is achieved at 1500 rpm.
The engine consumes 18-28 liters of fuel per hour, depending on the intensity of work. The highest speed that special equipment is capable of developing is 5.5 km / h.
The excavator is controlled by two levers with pedals. The working brake of the device is a hydraulic lock.
Peculiarities
The crawler excavator has two modes of boom operation, namely cutting and smooth operation, which made it possible to increase the productivity of Komatsu PS400-7, since in all cases it is possible to select the mode most suitable for the operation. The product has an increased indicator of the soil cutting force, and it also has a higher carrying capacity than its predecessors. In addition, the special equipment is characterized by increased stability, which is ensured by the improved structure of the counterweights.
Likewise, maintenance is facilitated for the model thanks to a range of solutions:
- access to the motor has been made more convenient, which makes it easier to study the unit;
- the radiator and oil cooler received a new design, which facilitates their dismantling and subsequent installation back;
- the performance of the air filter has increased;
- the design of the bushings for special equipment has been improved, which made it possible to extend the interval between lubrication of individual elements of special equipment;
- the period after which it is required to replace the filters in the hydraulic system and the Komatsu PC400-7 motor, as well as the oil inside the power plant, has increased.
In addition, another feature of the model is the appearance in it of the HydrauMind, a hydraulic system that has a closed center and two pumps with variable flow. This mechanism makes the best use of the power available from the vehicle's propulsion system, which reduces hydraulic losses and fuel volume.
The crawler excavator is suitable for use in the most difficult conditions. In particular, this special equipment excels in winter in areas with no infrastructure.
The flip side of the advantages of the PS400-7 excavator is that it is far from a budget model. The cost of Japanese special equipment is relatively high.
Prices
The price of the new excavator is currently approximately 28 million rubles. Used special equipment is available at prices ranging from three to ten million rubles. The exact price of an individual excavator is determined by the year of manufacture, the duration of operation and the current state.
Thus, the Komatsu PC400-7 crawler excavator is a productive Japanese special equipment, which is designed to perform a very wide range of operations in an equally high quality manner. The developers made sure that the model does not fail, even in difficult conditions, and the operator's comfort.
Video
Since 2000, the Yaroslavl plant of the Komatsu company has been producing one of the most popular models of earth-moving machines of the Japanese company - Komatsu PC400-7, weighing 41.4 tons. It was put into serial production in 2008. Although a more modern version of this technique, the Komatsu PC400-8, has appeared, the production of the "seven" continues: the model is appreciated by consumers and is in demand on the market. All PC400-7 excavators currently sold in Russia are made in Yaroslavl: the frame, turntable and working equipment are cast from domestic O9G2S metal; engine, hydraulic components and cab are supplied assembled from Japan.
The scope of application of Komatsu PC400-7 is a wide range of earthmoving and leveling works with soils of all categories: development of pits, construction of pits, trenches and special deepenings, loading and unloading operations with bulk materials, creation of earth embankments. The excavator is in demand in all branches of the mining industry, in the construction of roads, bridges and industrial facilities.
The main advantages of this excavator model are its balanced design; good maneuverability; the ability to use different modes of boom control - with smooth or powerful cutting; economical consumption of diesel fuel; high torque; closed center hydraulic system; Convenient, comfortable and safe work of the operator in an ergonomic cabin; simplicity and ease of maintenance. The interval for changing the oil filter of the hydraulic system was increased in this model from five hundred to one thousand hours, the interval for changing the oil in the engine and the engine oil filter - from two hundred and fifty to five hundred hours.
On Komatsu PC400-7, oil cooler and radiator can be easily removed and installed. Convenient and easy access to the motor for checking and routine maintenance is provided. Thanks to the updated design of the attachment bushings, the lubrication interval of the parts has been increased (which is an additional option).
The standard equipment of the Komatsu PC4OO-7 excavator includes: an automatic engine warm-up system, a counterweight, an electric sound signal, a right rear-view mirror, a multifunctional color display, 2 working lighting headlights.
The high-performance air filter used in this special vehicle is similar to that used on more powerful excavators. It has a significant service life during long-term operation, provides reliable protection against clogging and (as a result) against loss of engine power. The progressive seal design contributes to increased operational reliability. Compared to the previous model of the Komatsu excavator of a similar class, the volume of the fuel tank has been increased: from 6O5 to 65O liters of diesel fuel. Additional special treatment of the fuel tank reliably and for a long time protects it from the formation of corrosive manifestations on the metal surface.
It was also possible to achieve an increase in the pressure head force of the handle: the ultimate force increased by 8%, 214 kN (21.8 t); and the force of cutting the soil with a bucket - by 9% to 275 kN (28 t). These values are reached at maximum power. Added an additional option for a variable track gauge for the excavator. It significantly increases lateral stability. The Komatsu PC400-7 designers increased the gap between the swing frame and the track by 30%, thereby reducing the likelihood of damage to the swing frame when vehicles are moving on rocky and rocky ground.
The main and most common is the standard modification of the Komatsu PC4OO-7 excavator - with a 1.9 cubic meter rock bucket (on which a 2.1 cubic meter bucket can also be installed).
A special version is also offered for the operation of a heavy special vehicle in harsh low-temperature natural and climatic conditions (up to -5O degrees). It differs from the standard by the presence of rubber products made of special materials that do not “tan” and retain all their elasticity parameters in severe frost. In particular, the hydraulic drive uses high-pressure cuffs and sleeves that remain elastic in the cold. And also - the presence of a liquid pre-heater "Mikuni", which, together with the engine coolant, heats up the entire engine compartment of the excavator.
Since 2016, a special modification for quarrying has also been in production, the main feature of which is a special rock bucket with a volume of 2.8 cubic meters in the basic configuration. This is the Komatsu PC400LC-7 excavator - a powerful earthmoving machine with the highest cutting forces in its class, a special tool for performing a significant amount of work related to excavation of different degrees of soil density and loading of these materials.
Komatsu PC400LC-7 in operation.
The heavy-duty rock bucket with a volume of 2.8 m3 is standard attachment for the PC4OOLC-7 SE excavator. The mass of this bucket is 2.36 tons. It has a special teardrop shape, for an optimal trajectory of movement and the least friction on the ground, with a decrease in the loads on the main working bodies - the hydraulic drive and the engine.
The Komatsu PC400LC-7 SE modification is designed to be introduced into the quarry production chain, in which road dump trucks with a carrying capacity of up to forty tons are involved. This excavator requires six working cycles to fill a standard 18 m3 tipper body and 8 working cycles to fill a 24 m3 body.
The Komatsu PC400-7 excavator is equipped with a six-cylinder SAA6D125E turbocharged, liquid-cooled, direct-injection diesel engine. The working volume of this engine is 11, J4 liters. Rated speed - 1 85O rpm. The power of the power unit is 255 kW, or Z47 horsepower. When the economy mode is activated, the diesel fuel consumption is reduced by approximately 20% compared to the Komatsu PC400-6 model. The cylinder diameter is 125 mm. The piston stroke is 15O mm.
The required performance level in combination with economical diesel consumption can be achieved thanks to the presence of two modes of operation. The first mode - active - implies maximum performance. Thanks to the extra high power function (with a response time of 8.5 seconds), the cutting force is greatly increased. The second - economical - is designed for light operating conditions and allows you to work at the same speed as in active mode, but with much lower diesel fuel consumption. Savings are achieved by optimizing the injection of diesel fuel using electronic control of the injection of the fuel mixture.
In terms of environmental performance, this engine meets the requirements of EPA, EU and Japan Tier 2 (Tier 2) for air emissions.
The central frame of the Komatsu PC4OO-7 excavator is cruciform, the crawler frame is box-shaped. The caterpillar track is of the compacted type. Track tension regulator - hydraulic. On each side, 46 shoes are installed (for PC4OO-7), or 49 shoes (for Komatsu PC4OOLC-7); two carrier rollers and 7 track rollers each (for PC4OO-7), or 9 track rollers (for Komatsu PC4OOLC-7).
Strengthening the lateral stability and increasing the carrying capacity (in comparison with its predecessors) is achieved due to the significant mass of the counterweight (ZZO kg) and the well-balanced body of the heavy special vehicle. The likelihood of damage to the lower section of the swing frame when traveling over rocky or stony terrain has been reduced by increasing the gap between the swing frame and the track by up to thirty percent.
As an additional option, the manufacturer offers a variable track width. Its expansion significantly increases lateral stability. And the reduction of the track gauge is done to fully comply with the requirements for the transportation of heavy special equipment.
This special equipment is equipped with hydraulics of the Hydrau Mind trademark. It is characterized by a closed center, 2 variable transmission (variable power) pumps and an electronic control system. Thanks to this modern hydraulics, the power characteristics of the engine are optimized, as well as hydraulic losses during operation and the total consumption of diesel fuel are reduced. The highest hydraulic flow rate is 616 liters per minute of hydraulic operation, and the pressure reaches 355 kg per square centimeter.
The swing system is equipped with a hydrostatic drive. A planetary gear is used as a platform reducer. The circle is lubricated by an internal oil bath. A hydraulic lock acts as a service brake. A special brake is applied for the transport position, and a mechanical disc brake is used to block the swing of the platform. The platform turns at nine revolutions per minute.
The cabin volume has been increased by 14 percent in this model compared to the Komatsu PC400-6 excavator. It was possible to achieve a decrease in vibration load at floor level - from 12O to 115 deciBells. This result was achieved by the revision of the cab damper system, which used a long stroke and an additional spring. Plus, the left and right cockpit panels were also reinforced. The blind working areas have been significantly reduced - by 34 percent: the right window pillar has been completely removed and the shape of the rear pillar has been significantly changed.
The installation of vibration-reducing damper devices that she gave reduced the fatigue of the excavator operator and created a more comfortable working environment. The Komatsu PC4OO-7 cab is well sealed, therefore, it is adequately protected from dust and noise loads. The cab is reliably protected by a rigid frame from heavy objects falling onto it. The degree of protection of the operator's workplace corresponds to the second class according to IS0 1О262.
An automatic air conditioner is optional, as is a beverage cooler / warmer. An air conditioner with a capacity of 6.9 thousand kcal is used, which works both for cooling and heating. Its two-level function allows airflow to be directed to both the face and feet of the operator. The cab has a washable floor mat with flanges and drain holes for easy draining.
Proportional pressure multi-position control handles are multifunctional and multi-position, delivering consistently high precision across the entire range of operating procedures. The ergonomics of the arrangement of the controls in the excavator cab have been verified and thought out to the smallest detail, based on many years of production experience. The operator can move the chair forward and backward, as well as the control levers. Thanks to the double sliding mechanism, the chair and the control levers can be moved together or separately. As a result, the operator can position the levers to provide optimum control and comfort for himself. The backrest can also be reclined until it is completely horizontal.
The manufacturers say the PC400-7 has the most advanced diagnostic system in the industry. This Komatsu system identifies maintenance positions, reduces diagnostic time, indicates the right time to change oil and filters, and displays possible error codes. The machine is monitored continuously.
The main equipment of the Komatsu PC400-7 excavator is a bucket, a backhoe. The boom has two modes of operation. One of them is smooth mode. The presence of this mode simplifies the collection of soil and rocks with a bucket after the explosion and (or) the leveling of the site. When the need arises for the maximum force of cutting the soil, then in order to increase the productivity of the excavator, its transition to the power mode is carried out. The cutting force of the boom is increased, and the efficiency of excavation of trenches and foundation pits on hard ground is increased. The boom of the PC4OO-7 rises smoothly, practically without lifting the front part of the excavator from the ground.
To ensure the versatility of the Komatsu PC400 excavator, it is envisaged to install additional working bodies on it, namely: a grab bucket; single-shank ripper for cutting and crushing rocky and hard soils, removing road surfaces, etc.; a bucket with a ripper for hard (frozen) and rocky soil; forks; hydraulic equipment: hammer or drill; vibration equipment: plunger and rammer.
Specifications in numbers
- Overall dimensions: transport length 11.94 m, overall width - 3.34 m, overall height - 3.635 m.
- Operating weight - 41.4 tons.
- Track width - 6OO mm.
- Maximum digging depth - 7.82 m.
- The highest cutting height of the soil - 1O, 91 m.
- The highest unloading height is 7.565 m.
- The maximum possible depth of the vertical pit wall is 6.78 m.
- The maximum possible cutting radius of the soil is 12, O25 m.
- Travel speed - 3-5 km / h.
- Ground pressure - O, 79 kg / cc.
- Stick length - 3.38 m.
- Boom length - 7, O6 m.
- The volume of the filling tanks: fuel tank - 65O l, coolant - 34.2 l, engine oil in the engine - 38 l, final drive, on each side (travel reducer) - 12 l, platform swing drive (swing reducer) - 16, 2 l, hydraulic tank - 248 l.
The Komatsu 400 excavator is widely used in various works in the construction industry. It is a powerful unit designed for excavation work. Thanks to its tracked drive, the device can successfully move even in severe off-road conditions, which makes it a versatile solution.
When planning to study the technical characteristics of the Komatsu 400, it is necessary to analyze in more detail the features of this model, its main advantages over analogues. It is a high-performance machine with high maneuverability and the largest digging radius in its class. This makes it the optimal solution for various construction work that requires the use of powerful equipment. When developing the model, the most modern technologies were used, which made it possible to achieve high reliability of the excavator and its long service life.
Equipment can work in difficult conditions
Considering the unit in more detail, it is advisable to highlight the following advantages that have made it incredibly popular among consumers:
- ease of care and maintenance;
- robust design that can withstand severe mechanical stress;
- excellent environmental performance of the engine;
- maneuverability that allows the device to move even in confined spaces;
- ease of management;
- several operating modes of the boom;
- wide range of applications.
Mention should be made of the low level of fuel consumption, which significantly reduces the cost of operating equipment. Due to the presence of a counterweight in the design of the device, it is possible to significantly increase the maximum lifting capacity, as well as increase the stability of the excavator.
Despite the fact that Komatsu is a Japanese brand specializing in the production of various special equipment, this model is successfully produced in the Russian Federation, in Yaroslavl. The device has excellent performance, which makes it the optimal solution for handling handling, pits, ditches, trenches, quarrying.
Specifications
One of the most important features that the Komatsu RS 400 7 excavator can boast of is its excellent technical characteristics, which allow it to be used for intensive work. Among them it should be noted:
- device weight - 41.4 tons;
- digging depth - 7.82 m;
- digging height - 10.92 m;
- handle length - 2.4 m;
- unloading height - 7 m;
- type of fuel consumed - diesel;
- fuel tank capacity - 650 l;
- fuel consumption - 18-28 l / h, depending on the operating mode.
It should also be mentioned that the excavator generates ground pressure not exceeding 0.79 kg / cm3, and the travel speed is 5.5 km / h. In this regard, it is advisable to use other special equipment to transport equipment to the place of work.
The excavator works with various attachments
Dimensions (edit)
This excavator model has optimal dimensions that allow it to successfully maneuver even on small construction sites. The length of the device reaches 11.9 m, and the width is 3.3 m. The height of the excavator is 3.9 m, due to which it is possible to simplify the loading work. The minimum turning radius of the vehicle is 3.6 meters, and the track width is 60 cm.
Engine
Komatsu RS 400 is equipped with an engine of its own production, modification SAA6D125E-3, which is equipped with 4 cylinders and has a capacity of 347 hp. Its working volume reaches 11 liters, and the combined system, which includes liquid and air cooling, effectively avoids overheating, even under heavy loads.
The power unit installed in the model provides for the presence of electronic fuel injection, which can significantly reduce the level of fuel consumption due to more accurate dosing. The diameter of each cylinder is 12.5 cm.
It should be mentioned that the motor is capable of operating in a powerful and economical mode. The first is the optimal solution for labor-intensive tasks, while the second is suitable for significantly reducing fuel consumption.
Chassis
Another important design element of this unit is the undercarriage, which is a tracked drive mounted under the turntable of the unit. Its feature is the increased clearance between the platform and the belt, which eliminates damage when driving on rocky ground.
Cabin
A characteristic feature that distinguishes this special tool from most of its counterparts is the operator's cabin. It is designed for maximum comfort and efficiency in excavator control. It has been significantly improved, which made it possible to achieve:
- excellent heat and sound insulation;
- reduction of vibration during operation;
- the degree of protection corresponds to ISO 10262.
The significant increase in cab space deserves mention - up to 14%, which makes the use of the excavator even more comfortable. The operator's seat is adjustable in a wide range, which allows it to be adjusted to the anatomical features of each user.
Hydraulic system
The hydraulic system HydrauMind is of great importance in the design of the unit, which ensures its efficient operation. Its distinctive feature is the presence of a closed center, as well as two variable drive pumps. The electronic control unit is responsible for their correct operation. The flow rate in the system is 616 l / min, and the pressure can reach 355 kg / cm 2.
Maintenance of equipment
Komatsu RS 400 is easy to operate and maintain, which has made it incredibly popular among a wide range of consumers. The design of the model has undergone a number of changes to simplify maintenance. This is the presence of an air filter with an impressive service life, which allows you to significantly increase the maintenance interval even when working in dusty areas. Access to the main components and consumables is extremely easy, which allows you to quickly repair or replace them if necessary.
Worth mentioning:
- redesigned bushing design, which allows you to change lubricants much less often;
- improved oil cooler and radiator, which are now much easier to dismantle;
- Fuel and hydraulic oil filters are specially designed for long service life.
These features distinguish this crawler excavator from most analogues on the market. It is extremely important to follow all the rules and recommendations of the manufacturer supplied with the unit, which will make it possible to carry out repairs much less often.
Attachments
Komatsu can use an impressive range of attachments to significantly expand its functionality. Available options include buckets, pallet grabs, hydraulic augers, hammers, loaders and more. They allow you to use the excavator for solving non-standard tasks that cannot be dealt with without the use of additional equipment. When using such products, the technical parameters of the excavator, for example, weight or dimensions, may differ from the standard ones.
The Komatsu PC400 excavator is of the greatest interest to consumers among the construction special equipment of this manufacturer. This is due to the advantages of the machine - excellent technical parameters, maneuverability and productivity. The excavator has the largest digging radius in its class as well as cutting depth. In the development of technology, modern solutions were used, and in production - innovative technologies. The automated assembly of the machine ensures the high quality of the finished product. The main operational properties are high thanks to the installation of high-quality and durable components.
Features and Benefits
Komatsu RS 400 is used when performing the following works:
- embankment device;
- loading and unloading operations with bulk materials;
- backfilling of recesses;
- device of recesses;
- quarrying.
Due to the versatility and multifunctionality of the excavator, it is widely used in mining, oil and gas industry, metallurgical industry and other areas of the economy. The main advantages of the Komatsu PC400 include:
- ease of maintenance and care;
- the ability to work in various conditions;
- reliable and durable construction;
- environmental friendliness of the power plant;
- maneuverability;
- ergonomic controls;
- the ability to select the operating mode of the boom equipment (maximum power or smooth running);
- safety and comfort;
- performance;
- efficiency in terms of fuel consumption;
- efficiency;
- multifunctionality;
- versatility.
In addition, a counterweight was installed on the equipment, due to which the carrying capacity and stability increased. Anti-slip handrails, fences and steps are provided for operator safety. This eliminates the occurrence of unforeseen situations during operation.
Like the RS300 model, the Komatsu RS 400 excavator has extended intervals for the replacement of fuels and lubricants and fluids, as well as increased reliability of the working parts. He easily copes with the tasks assigned when working in an aggressive environment. The advantages of the machine include power and a long service life, which are due to the installation of reliable and high-quality parts.
Specifications and dimensions
The main technical characteristics of the Komatsu PC400 include:
Overall characteristics of Komatsu RS 400:
Fuel consumption
The Komatsu PC400 crawler excavator uses 18 to 28 liters of diesel fuel per hour on average. At the same time, 650 liters of diesel is placed in the refueling tank, which guarantees long-term operation without the need for refueling.
Engine
The Komatsu RS 400 is equipped with a four-stroke six-cylinder power unit with a capacity of 347 horsepower. Model SAA6D125E-3 with a volume of 11 liters is equipped with liquid and air cooling systems, direct fuel mixture supply and turbocharging. The maximum speed of the excavator is 5.5 km / h. Fuel injection is carried out using control electronics, which guarantees a reduction in fuel consumption and economy. The engine rotates at 1,850 rpm and each cylinder has a diameter of 12.5 cm.
The exhaust quality of the power plant complies with international Tier II standards. Thanks to this motor, the operator can select the Komatsu RS 400 operating mode:
- powerful, at which the maximum power is generated, providing excellent productivity and low diesel consumption;
- economy mode used for simple jobs. In this case, the driving speed remains the same, and the fuel consumption is reduced.
Device
To increase the efficiency of the PC400, there are:
- increased stability due to the device of improved counterweights;
- the ability to handle loads of greater weight;
- increased effort of cutting the soil;
- two operating modes of boom equipment (smooth and powerful), due to which it is possible to select the characteristics necessary for a certain type of work.
Chassis
The increased clearance between the KOMATSU PC 400 turntable and the caterpillar belt eliminates mechanical damage to the lower part of the structure while moving over rocks.
Hydraulic system
The equipment is equipped with HydrauMind hydraulics, characterized by a closed center, installation of two variable-drive pumps and an electronic control system. Thanks to it, the optimization of the power characteristics of the engine is achieved, hydraulic losses during operation and the consumption of diesel fuel are reduced.
The Komatsu RS 400 hydraulic system has several distinctive features. This is a set of pumps of hydraulic type with pistons with variable power. The maximum flow rate is 616 liters per minute of operation, the pressure is 355 kg / sq. cm.
