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      The Komatsu D85 Dozer: Everything You Need to Know

      What is a Komatsu D85 dozer?

      When it comes to construction, mining, and large-scale earthmoving projects, there are only a select few machines that mean serious business.

      The Komatsu D85 dozer is one of them. 

      Designed and manufactured by Komatsu – one of Australia’s true titans of the earthmoving industry – the D85 crawler dozer is known specifically for its high-powered durability, versatility, construction, and advanced onboard features, making it a perfect choice for such jobs such as grading, levelling, and heavy-duty earthmoving.

      So if you’ve ever wanted to know everything you’d ever need to know about the Komatsu D85, we’ve put together a blog that will explore why it’s one of the most cost and time-saving pieces of earthmoving machinery you’ll find.

      Need a dozer that delivers?

      We’ll match you with suppliers offering Komatsu D85 dozers for site prep, land clearing, or heavy-duty earthworks—fast quotes, top machines, no hassle.

       

      Komatsu D85 dozer specs

      The Komatsu D85 dozer comes in a standard EX track model (D85EX-18) and a low-ground-pressure PX track model (D85PX-18). 

      The choice between the D85EX-18 and D85PX-18 depends on the specific needs of the job site and the ground conditions. The EX track model provides versatility for a range of applications, while the PX track model is designed to excel in situations where reduced ground pressure is essential.

      Here are some other key differences between the two:

       

      D85EX-18 specifications

      Specs

      Value

      Engine model

      Komatsu SAA6D125E-7

      Type

      4-cycle, water-cooled, direct injection

      Aspiration

      Komatsu variable geometry turbocharged, air-to-air aftercooled

      Number of cylinders

      6

      Bore x stroke

      4.49 x 5.69 in

      Piston displacement

      674 in³

      Horsepower

       

      SAE J1995

      267 HP

      ISO 9249/SAE J1349*

      264 HP

      Rated rpm

      1900

      Fan drive type

      Hydraulic

      Lubrication system

       

      Method

      Gear pump, force lubrication

      Filter

      Full-flow

      TORQFLOW transmission

      Water-cooled, 3-element, 1-stage, 1-phase and a planetary gear, multiple disc clutch transmission

      Steering system

      Palm Command Control System (PCCS), Hydrostatic Steering System (HSS)

      Undercarriage

       

      Suspension

      Oscillating equaliser bar and pivot shaft

      Track roller frame

      Monocoque, large section, durable construction

      Rollers and idlers

      Lubricated track rollers

      Capacity

       

      Fuel tank

      124.1 US gal

      Coolant

      17.2 US gal

      Engine

      10.0 US gal

      Operating weight

       

      Tractor

      53,770 lbs.

      Operating weight

      68,165 lbs.

      Hydraulic system

       

      Relief valve setting

      3,270 psi

      Blade lift

      Raise, hold, lower, and float

      Blade tilt

      Right, hold, and left

       

      D85PX-18 specifications

      Specs

      Value

      Engine model

      Komatsu SAA6D125E-5

      Type

      4-cycle, water-cooled, direct injection

      Aspiration

      Turbocharged, after-cooled, cooled EGR

      Number of cylinders

      6

      Bore x stroke

      125 mm x 150 mm

      Piston displacement

      11.04 ltr

      Horsepower

       

      SAE J1995

      199 kW / 266 HP

      ISO 9249/SAE J1349

      197 kW / 264 HP

      Rated rpm

      1900

      Fan drive type

      Hydraulic

      Lubrication system

       

      Method

      Gear pump

      Filter

      Full-flow

      TORQFLOW transmission

      Water-cooled, 3-element, 1-stage, 1-phase and a planetary gear, multiple disc clutch transmission

      Steering system

      Palm Command Control System (PCCS), Hydrostatic Steering System (HSS)

      Undercarriage

       

      Suspension

      Oscillating equaliser bar and pivot shaft

      Track roller frame

      Monocoque, large section, durable construction

      Rollers and idlers

      Lubricated track rollers

      Capacity

       

      Fuel tank

      490 ltr

      Coolant

      58 ltr

      Engine

      38 ltr

      Operating weight

       

      Operating weight

      27,650 kg

      Hydraulic system

       

      Relief valve setting

      230 kg/cm2

      Maximum pump flow

      195 ltr/min

       

      Komatsu D85 dozer uses

      • Construction: Excels in grading, levelling, and earthmoving tasks on construction sites, including site preparation and foundation work.

      • Infrastructure development: Used for moving earth for road and highway constructions, as well as other large-scale infrastructure projects.

      • Mining and quarrying: Suitable for certain medium-duty mining applications, such as moving and shaping material.

      • Land clearing: Efficiently clears land for development, agriculture, or other purposes, removing vegetation and obstacles.

      • Agriculture: Assists in tasks such as land levelling and clearing for agricultural purposes.

      • Waste management: Used in landfill operations for compacting and shaping waste material.

       

      Key features and benefits of Komatsu D85 dozers

      Customisability

      The Komatsu D85 dozer offers various blade types, including straight, Semi-U, Sigmadozer, and Full U (exclusive to D155), to suit different operational needs. Track shoe width and horsepower can also be tailored to meet specific requirements.

      Fuel efficiency

      These dozers are equipped with an advanced Tier 4 engine, balancing robust performance with fuel efficiency. Features like auto idle shutdown, adjustable between 5-60 minutes, help reduce fuel consumption and emissions.

      Operator comfort

      Designed with ergonomic palm command joysticks, the D85 enhances operator comfort and reduces fatigue. The easy selection between auto and manual shift modes further aids in precise operations, contributing to operator ease during extended use.

      Manoeuvrability

      The hydrostatic steering system allows operators to smoothly execute powerful turns by transmitting engine power to both tracks without interruption, while also minimises the turning radius through counter-rotation while in neutral.

      Durable undercarriage

      The Parallel Link Undercarriage System (PLUS) is a notable feature for extending the lifespan of the dozer's undercarriage components. Incorporating rotating bushings, this design potentially doubles the lifespan as compared to traditional undercarriages and reducing the need for frequent replacements

      Enhance productivity

      The inclusion of a lockup torque converter improves work efficiency, which is a feature that selects the optimal gear based on load and conditions while the lockup mechanism efficiently transfers engine power to the transmission, thusboosting drive train efficiency.

      Intelligent Machine Control (iMC)

      The integration of iMC technology in these dozers supports operators from the initial rough cut to the final grade. It allows for nearly complete automatic control in certain situations, adapting to operator input, and providing an accelerated learning curve for new operators.

      DPF regeneration

      Tier 4 machines employ diesel particulate filters for engine soot removal through regeneration. To further minimise operational impact, D85 models utilise continuous passive regeneration and active regeneration, often without requiring the dozer to stop.

       

      Takeaways

      We’ve gone over a lot of details about the Komatsu D85 – but one of the most important one that should be leaping out to you is that this is a machine that’s most likely to deliver exceptional results for your earthmoving job. 

      Whatever your needs, the D85 is a machine you can rely on – so if you’re interested in hiring a dozer now, the online construction marketplace at iseekplant can help connect you to the right suppliers for your plant hire needs with no fuss, hassle, or stress. For the best machinery for hire and construction services, hop over to our platform now and we’ll find you the best partner for your business.