- 18,695 lbs Operating Weight
- 89 @2200 rpm Horsepower
- 2.5 yd³ Blade Capacity
Komatsu small dozers are great finish grading tractors for a lot of reasons but the most obvious is the super slant nose design. The super slant nose design moves the coolers and hydraulic fan to the rear and the operator forward to create a balance that makes fine grading with or without a grade control system a breeze. A fully hydrostatic drivetrain gives the operator incredibly quick and precise maneuverability. And new Power and Economy working modes allow the operator to adjust his machine’s performance to his current job and save on fuel consumption as he’s doing it. Like all Komatsu products, the D37EX-23 has the advanced hydraulics to make the addition of a grade control system seamless and turn it from a great grading tractor to an incredibly precise and fast fine grading system.
All daily checks can be performed efficiently from the left side of the machine.
In order to support optimum operation, the following 4 recommendations are displayed
to improve fuel saving operation:
1) Avoid Excessive Engine Idling
2) Use Economy Mode to Save Fuel
3) Avoid Hydraulic Relief Pressure
4) Avoid Overload
The operator can access the ECO guidance menu to check the Operation Records, Eco Guidance Records, and Average Fuel Consumption logs.
Electronic Controlled Hydraulic System (EPC) Blade Control Joystick
Blade control joystick uses the EPC valve and joystick, similar to the travel control joystick. EPC control combined with the highly reliable Komatsu hydraulic system enables superb fine control. A switch is now used to angle the PAT blade. A button to activate float is also provided.
Hydraulically-Driven Swing-up Fan
The D37-23 utilizes a swing-up fan with a gas strut-assisted lift locking system to provide easy access to the (side-by-side) radiator, oil cooler, and charge air cooler. The swing-up feature makes it easier to access cooling cores. The hydraulic fan can rotate in the reverse direction to help remove debris from cooler cores.
One of the design goals behind the creation of the D37 was to manufacture a more durable machine. This was achieved by reducing component complexity and using a strong modular design for increased serviceability and durability. Steel castings reduce the number of welds, improving C-frame rigidity and strength.
New HST Technology
The D37-23 incorporates new proprietary engine and hydrostatic transmission pump control technology to improve operational efficiency and reduce fuel consumption to levels lower than a conventional HST control system can obtain. This Komatsu exclusive feature reduces fuel consumption by up to 10% in P mode in demanding working conditions and up to 20% in E mode under lighter load conditions as compared to the prior model.
Powerful turns under various work conditions are achieved with the new HST transmission, even under load. Counter-rotation is available for minimum turning radius, providing excellent maneuverability in tight spots.
Palm Command Control System PCCS Travel Joystick
Palm command travel joystick provides the operator with a relaxed posture and superb fine control. Transmission shifting is simplified with thumb push buttons.
Power Angle Tilt PAT Dozer With Adjustable Pitch
A Power Angle Tilt dozer blade with highly durable box-structure frame is available for the EX and PX machines. The hydraulic blade tilt and angling functions and manually adjustable blade pitch expand versatility and productivity in a variety of applications. This PAT dozer assembly is tested to stringent test standards.
Rear View Monitoring System
On the large LCD color monitor, the operator can view, through one camera, areas directly behind the machine. This camera can be synchronized with reverse operation.
Robust Guarding And Attachments
Komatsu offers a full guarding package to help protect your machine and operator in severe applications.
Secondary Engine Shutdown Switch
A new secondary switch has been added, at the side of the front console, to shut down the engine.
Selectable Working Mode
Working mode E is for general dozing applications with adequate speed and power while reducing fuel consumption and CO2. Working mode P is aimed at powerful operation and maximum production. The working mode is easily switched on the monitor panel, depending on the work at hand.
E mode (Economy mode)
With E mode, the engine outputs enough power for most general dozing applications without delivering unnecessary power. This mode allows for energy saving operation and is suitable for work on ground where the machine may experience shoe slip or applications not requiring large power such as downhill dozing, leveling and light-load work.
P mode (Power mode)
With P mode, the engine outputs its full power, allowing the machine to perform large production, heavy-load, or uphill work.
Single Pedal (Decelerator/Brake Pedal) to be operated for Speed Control, during Operation
Machine operation becomes simple because brake function has been integrated into decelerator pedal. Machine moving speed including/excluding engine speed can be controllable by using only one pedal of decelerator/brake pedal. Operation of pedal function can be changed by the mode selector switch.
The pedal can decelerate engine RPMS and vehicle travel speed. Normally can be used for all applications.
The pedal can decelerate vehicle travel speed, keeping high engine revolution. This mode can be helpful to keep work equipment controllability and/or force, even during braking.
Unrivaled Blade Visibility
The D37EX/PX-23 incorporates Komatsu’s super-slant nose design. Komatsu’s innovative design provides excellent blade visibility for improved machine control and increased efficiency and productivity.
Variable and New Customizable Quickshift Modes
The D37-23 offers two gearshift modes: Variable and the new Customizable Quick shift. Variable shift mode provides 20 incremental speed settings for the operator, while the new Customizable Quick shift provides 3 speed settings; all can be adjusted in the monitor to obtain the right speed for different operator preferences.
|Type||4-cycle, water-cooled, direct injection|
|Aspiration||Variable flow, turbocharged, air-to-air aftercooled|
|Number of cylinders||4|
|Bore x stroke||3.75" x 4.52"||95 mm x 115 mm|
|Piston displacement||199 in³||3.26 ltr|
|SAE J1995 - Gross||91 HP||68 kW|
|ISO 9249 / SAE J1349 - Net||89 HP||66 kW|
|Hydraulic fan at maximum speed - Net||79 HP||59 kW|
|Rated rpm||2200 rpm|
|Fan drive type||Hydraulic|
|Method||Gear pump, force lubrication|
|*EPA Tier 4 Interim and EU stage 3B emissions certified|
In-shoe mounted axial piston type travel motors with integrated two stage planetary gear reduction. Compact in-shoe mount reduces risk of damaged by debris. Bolt-on sprocket ring.
|Closed-center Load Sensing System (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.|
|Hydraulic control unit:|
|All spool control valves externally mounted remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 99 ltr/min / 26 U.S. gal/min at rated engine rpm.|
|Relief valve setting||3,974 psi||27.4 MPa / 280 kg/cm²|
|Hydraulic cylinders||Double-acting, piston type|
|Number of cylinders:||Bore||Bore|
|Blade lift / 2||3.0"||75 mm|
|Blade tilt / 1||3.5"||90 mm|
|Blade angle / 2||3.1"||80 mm|
|Hydraulic oil capacity (refilling):|
|Power angle tilt dozer||15.9 U.S. gal||60 ltr|
|3-spool control valve for power angle tilt dozer.|
|Blade lift||Raise, hold, lower, and float|
|Blade tilt||Right, hold, and left|
|Blade angle||Right, hold, and left|
|Additional control valve required for ripper.|
|Ripper lift||Raise, hold and lower|
Dual-path, hydrostatic transmission provides infinite speed changes up to 5.3 km/h / 8.5 mph. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.
(quick shift mode)*
|*Quick shift speeds are adjustable in the monitor.|
Operating Weight (APROXIMATE)
|Tractor weight: Including ROPS cab, U frame for power angle tilt dozer, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment.||16,314 lb||7400 kg|
|Operating weight: Operating weight: Including power angle tilt dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.||18,695 lb||8480 kg|
Service Refill Capacities
|Coolant||9.0 U.S. gal||34 ltr|
|Fuel tank||50.2 U.S. gal||190 ltr|
|Engine oil||2.9 U.S. gal||11 ltr|
|Hydraulic tank||16.9 U.S. gal||64 ltr|
|Final drive (each side)||0.9 U.S. gal||3.5 ltr|
Palm Command Control System (PCCS) joystick control for all
directional movements. Pushing the joystick forward results in
forward machine travel, while pulling it rearward reverses the
machine. Simply tilt the joystick to the left or right to make a turn.
Tilting the joystick fully to the left or right activates counter-rotation.
Hydrostatic Transmission (HST) provides smooth powerful turns. Fully electronic control enables smooth control that can be adjusted in the monitor. The PCCS utilizes shift buttons to increase and decrease speed.
|Minimum turning radius*||79"||2.0 m|
|*As measured by track marks on the ground at pivot turn.|
|Suspension||Rigid track frame|
|Track roller frame||Monocoque, large section, durable construction|
|Rollers and idlers||Lubricated track rollers|
|Lubricated tracks:||Unique seals minimize the entry of foreign abrasive material into pin to bushing clearances to provide extended service life. Track tension is easily adjusted with a grease gun.|
|Sealed and lubricated track||Track tension is easily adjusted with grease gun.|
|Tractor for inside mounted blade (PAT)|
|Number of track rollers (each side)||6|
|Number of carrier rollers (each side)||1|
|Type of shoes (standard)||Single grouser|
|Number of shoes (each side)||41|
|Grouser height||1.9"||47 mm|
|Shoe width (standard)||18"||460 mm|
|Ground contact area||2,778 in²||17920 cm²|
(with standard shoe)
|6.39 psi||0.45 kgf/cm² / 44.1 kPa|
|Track gauge||5'2"||1570 mm|
|Length of track on ground||7'4"||2230 mm|
|Link pitch||6.1"||154 mm|
- Air cleaner, double element with caution lamp on monitor
- Alternator, 60 ampere/24V
- Backup alarm
- Batteries, 92 Ah/2 x 12V
- Battery disconnect switch
- Blade lift cylinders
- Color monitor, LCD
- Decelerator pedal (single pedal)
- Engine hood
- Engine intake centrifugal precleaner
- Engine, swing open side cover
- Engine shutdown secondary switch
- Front pull hook
- Fuel prefilter (10 micron) and fuel filter (2 micron)
- Grease gun holder
- High mount foot rests
- Horn, warning
- Hydraulic driven radiator cooling fan with reverse clean mode
- KOMTRAX® Level 4
- Komatsu Diesel Oxidation Catalyst (KDOC)
- Locks, filler caps and covers
- Muffler with curved exhaust pipe
- Radiator mask, heavy-duty, swing up
- Radiator reserve tank
- ROPS cab**
- Air conditioner
- Cab accessories
– 12V power supply (2 ports)
– Cup holder
– Rearview mirror
– Rear view monitoring (1 camera)
– AM/FM Radio w/remote AUX plug (3.5 mm)
– 70 dBA
- Work lights
– 3 front, cab mounted
– 2 rear, cab mounted
- Seat, air suspension, fabric, heated low back, headrest
- Seat belt, 76 mm / 3'', retractable
- Seat belt indicator
- Sealed electrical connectors
- Side by side rear mounted cooling package
- Starting motor, 4.5 kW/24V
- Steering system, hydrostatic
- Track roller guards, center and end sections
- Track shoe assembly
--Sealed and lubricated
- 400 mm / 16'' single grouser shoe (EX)
- 600 mm / 24'' single grouser shoe (PX)
- Transmission with Variable and Customizable Quickshift
- Transmission, hydrostatic
- Underguards, heavy duty
- Variable flow turbocharger
- Water separator
* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS and FOPS Level 2 standards
- Dozer assembly
- Hydraulics for rear equipment
- Track roller guard, full length
- Weight: 470 kg / 1,036 lb
- Beam length: 1569 mm / 62''
- Maximum lift above ground: 389 mm / 15''
- Maximum digging depth: 336 mm / 13''
- Number of shanks: 3