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D1 MulcherNon-Current
D1 Mulcher - 2021, Tier 4 Final, EU Stage V, NACD, EU
Overview
The D1 Mulcher features improved visibility, seat mounted controls, an intuitive operator interface, a pressurized cab, a hinged radiator grill, a tractor platform, a long life mulching head, a hydraulically operated front door and adjustable push bar, a closed loop hydrostatic circuit, a reversible drum, a drum speed bar indicator, a Cat C3.6 diesel engine, a Cat Sealed and Lubricated Track, a reversing fan, a turbine precleaner, and improved fuel economy.
Specifications
Units:
| Engine Model | Cat C3.6 |
| Control | Hydraulic |
| Power - Net | — |
Benefits & Features
IMPROVED VISIBILITY
- A lower sloping hood line provides improved peripheral vision to the mulching head, allowing the operator to better assess the jobsite.
SEAT MOUNTED CONTROLS
- Mounted on the air suspension seats, these controls isolate the machine vibration from the operator, reducing operator fatigue.
INTUITIVE OPERATOR INTERFACE
- Primary display is a 254 mm (10") touchscreen color monitor with back up camera.
March 13, 2026
Specifications
Units:
| Engine Model | Cat C3.6 |
| Power - Net | — |
| Displacement | — |
| Note (1) | Net power is tested per ISO 9249:2007 and SAE J1349:2011 and as advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator. |
| Net Power - 2,200 rpm - SAE J1349 | — |
| Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 | — |
| Note (2) | All non-road U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 (Tier 4 Final) and Korea Tier 4 Final diesel engines are required to use only Ultra Low Sulfur Diesel (ULSD) fuels containing 15 ppm EPA/10 ppm EU (mg/kg) sulfur or less. |
| Power Train | Hydrostatic |
| Operating Weight | — |
| Operating Weight - LGP | — |
| Note | Specifications shown are for machine equipped with mulcher, cab ROPS, back-up alarm, operator, coolant, lubricants and full fuel tank. |
| FOPS | ISO 3449:2005 Level II |
| ROPS | ISO 3471:2008 |
| Drive Pumps | 1 |
| Relief Valve Settings | — |
| Maximum Travel Speed - Forward | — |
| Track Motors | 2 |
| Maximum Travel Speed - Reverse | — |
| Track Gauge - LGP | — |
| Shoe Width - Standard | — |
| Shoe Width - LGP | — |
| Length - Track on Ground - LGP | — |
| Track Gauge | — |
| Number of Rollers - Each Side | 6 |
| Ground Pressure - LGP | — |
| Number of Shoes - Each Side - Sealed and Lubricated Track (SALT) Undercarriage | 43 |
| Ground Pressure | — |
| Length of Track on Ground | — |
| Transmission - Hydraulic Tank | — |
| Crankcase - With Filter | — |
| Cooling System | — |
| Final Drive - Each - LGP | — |
| Fuel Tank | — |
| Diesel Exhaust Fluid (DEF) Tank | — |
| Final Drives - Each Side | — |
| Pump Output | — |
| Relief Valve Settings | — |
| Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe). See label or instruction manual for gas refrigerant identification. If machine is equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (4.0 lbs) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.873 tons). If machine is equipped with R1234yf (Global Warming Potential = 0.501), the system contains 1.7 kg (3.75 lbs) of refrigerant, which has a CO2 equivalent of less than 0.001 metric tonnes (0.001 tons). |
| Track Gauge - LGP | — |
| Width - Tractor - Standard Shoes - No Mulcher - LGP | — |
| Overall Length - With Blade - LGP | — |
| Tractor Height - LGP | — |
| Ground Clearance - LGP | — |
| Length - Basic Tractor - Without Mulcher - LGP | — |
| Width - Tractor - Standard Shoes - No Mulcher - Standard | — |
| Length - Basic Tractor - Without Mulcher - Standard | — |
| Tractor Height - Standard | — |
| Track Gauge - Standard | — |
| Ground Clearance - Standard | — |
| Overall Length - With Blade - Standard | — |
| Weight | — |
| Overall Height | — |
| Overall Width | — |
| Optimum Hydraulic Pressure | — |
| Drive Method | Polychain belt |
| Optimum Hydraulic Flow | — |
| Lift Height | — |
| Maximum Tilt | — |
| Working Width | — |
| Length | — |
| Drum Speed Range | 2,150-2,450 rpm |
| Maximum Angle - Either Side | 25° |
| Motor | Closed loop hydrostatic |
| Fixed Teeth per Drum | 38 |
| Control | Hydraulic |
| Speed | Variable |
| Winch Drive | Hydraulic |
| Weight | — |
| Drum Capacity - Optional Cable | — |
| Drum Capacity - Recommended Cable | — |
| Maximum Line Pull - Bare Drum | — |
| Maximum Line Pull - Full Drum | — |
| Maximum Line Speed - Bare Drum | — |
| Maximum Line Speed - Full Drum | — |
| Rope Diameter - Optional | — |
| Rope Diameter - Recommended | — |
| Overall width | — |
| Winch Length | — |
| Drum Diameter | — |
| Throat Clearance | — |
| Drum Width | — |
Benefits & Features
IMPROVED VISIBILITY
- A lower sloping hood line provides improved peripheral vision to the mulching head, allowing the operator to better assess the jobsite.
SEAT MOUNTED CONTROLS
- Mounted on the air suspension seats, these controls isolate the machine vibration from the operator, reducing operator fatigue.
INTUITIVE OPERATOR INTERFACE
- Primary display is a 254 mm (10") touchscreen color monitor with back up camera.
PRESSURIZED CAB
- Heated and air conditioned cab offers comfortable working environment resulting in less operator fatigue and improved productivity.
HINGED RADIATOR GRILL
- Allows for easy clean out of radiator without the need for tools.
TRACTOR PLATFORM
- Balanced and rugged for operating in rough terrain and soft underfoot conditions.
- Optional blade to provide machine application versatility.
LONG LIFE MULCHING HEAD
- New Cat® HM518 mulcher frame is designed for longer life using cladding material in high wear areas.
HYDRAULICALLY CONTROLLED
- Mulcher conveniently operates with a hydraulically operated front door and adjustable push bar.
CLOSED LOOP HYDROSTATIC CIRCUIT
- Delivers efficient, high performance power to the mulcher head, using less pump flow.
REVERSIBLE DRUM
- Easier operation and improved productivity.
DRUM SPEED BAR INDICATOR
- In-cab indicator, aids operator in managing ground speed and overall mulching productivity.
ENGINE
- Cat C3.6 diesel engine meets U.S. EPA Tier 4 Final/EU Stage V emission standards.
UNDERCARRIAGE
- Cat Sealed and Lubricated Track with 406 mm (16 in) or 635 mm (25 in) track shoes provides superior flotation and stability for wide range of operating conditions.
REVERSING FAN
- Auto reversing fan changes air flow direction to purge debris from radiator and enclosures.
TURBINE PRECLEANER
- Improves engine air filter life by removing large debris particles.
IMPROVED FUEL ECONOMY
- The D1 features the lowest fuel consumption in this size class with the same great performance you've come to expect.
SUSTAINABILITY
- The Cat® C3.6 engine meets U.S. EPA Tier 4 Final and EU Stage V, and Japan 2014 emission standards.
- Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to:
20% biodiesel FAME (fatty acid methyl ester)*
100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels
Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
* Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). - The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg (4.0 lb) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.873 tons).
- With cooling fan speed at 70% of the maximum value:
Guaranteed Exterior Sound Power (2000/14/EC ISO 6395:2008) – 109 dB(A)
Dynamic Operator Sound Pressure Level (ISO 6396:2008) – 76 dB(A)
Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/ windows open) for extended periods or in a noisy environment. - Caterpillar factory fills with ethylene glycol coolants. Cat Diesel Engine Antifreeze/Coolant (DEAC) and Cat Extended Life Coolant (ELC) can be recycled. Consult your Cat dealer for more information.
- Cat Bio HYDO™ Advanced is an EU Ecolabel approved biodegradable hydraulic oil.
- Additional fluids are likely to be present, please consult the Operations and Maintenance Manual or the Application and Installation guide for complete fluid recommendations and maintenance intervals.
- The following features and technology may contribute to fuel savings and/or carbon reduction. Features may vary. Consult your Cat dealer for details.
– Eco mode minimizes fuel consumption for light applications
– Save fuel with efficiency features such as engine idle shutdown
– Extended maintenance intervals reduce fluid and filter consumption
– Cut maintenance costs with extended maintenance intervals
– Boost productivity up to 50% with Cat technologies like Cat Grade with Slope Assist and Cat Grade with 3D and Operator Assist Features Stable Blade Lift and Tilt, Blade Load Monitor, Low Slip Traction Control and AutoCarry.
– Remote Flash and Remote Troubleshoot Recyclability – 98%
Data not available.
Standard Equipment
- POWER TRAIN
- Cat C3.6 diesel engine
- Turbocharged aftercooled
- Aluminum bar plate cooling system (radiator, power train)
- Air cleaner with precleaner, automatic dust ejection and under-hood intake
- Automatic traction control
- Drive, auxiliary
- Dual path, closed-loop hydrostatic transmission
- Electric fuel pump
- Fuel/water separator
- Reversing fan
- ELECTRICAL
- Alternator, 150 Amp, heavy duty
- Alarm, backup
- Batteries, heavy duty, maintenance free, 1,000 CCA
- Diagnostic connector
- Horn, electric
- Starter, electric, 12 volt heavy duty
- UNDERCARRIAGE
- SALT Undercarriage
- 6 roller track frame
- Track rollers, lifetime lubricated
- Carrier rollers
- Track adjusters, hydraulic
- Guards, front/rear guiding
- MULCHER HYDRAULICS
- Hydraulics, 4 valve (for use with retrieval winch or ripper)
- Load sensing hydraulics
- Single lever, three function control
- Hydraulic pump and oil
- Closed-loop hydrostatic circuit
- Axial Piston variable displacement pump and motor
- GUARDS
- Guard, track guiding, center
- Screen, rear, cab
- Screen, side, cab
- Sweeps, front
- Sweeps, rear
- Heavy duty crankcase guard
- OPERATOR ENVIRONMENT
- ROPS/FOPS cab
- Cab, polycarbonate windows and air conditioning
- Seat, air suspended, cloth
- Seatbelt, retractable 76 mm (3 in)
- Foot pads, dash
- Primary display, 254 mm (10") touchscreen color monitor with back up camera
- Electronic Monitoring System with:<br>– Gauges for engine coolant temperature, hydraulic oil temperature and fuel level<br>– Travel speed limiter, electronic<br>– Engine RPM and gear display<br>– Hour meter, electric<br>– Engine air cleaner service indicator, electronic<br>– Water-in-fuel indicator, electronic<br>– Mulcher drum speed and direction bar</br>
- Slope Indicate
- Throttle switch, rotary
- Controls, seat mounted, fore/aft adjustment
- Armrests, adjustable
- Mirror, rearview, inside
- Single pedal combining deceleration and braking functions
- Independent forward/reverse speed settings
- Power port, 12 volt
- Coat hook
- Storage compartment
- Cup holder
- Floor mat, rubber, heavy duty
- OTHER
- Cat Product Link™ PL641 Cellular
- C-Frame, VPAT, hydraulic cylinders and lines
- Lockable engine enclosures
- Front pull device
- Ecology drains (engine, power train and implement oil and engine coolant)
- Scheduled oil sampling (SOSSM) ports (engine, power train implement oil)
- Vandalism protection
- Hinged radiator grill
- Rearview camera
- Extended life coolant, –37° C (–35° F)
Optional Equipment
- ELECTRICAL
- Four integrated front halogen lights, two rear halogen
- BLADES
- VPAT XL blade
- VPAT LGP blade
- VPAT Intermediate blade
- OPERATOR ENVIRONMENT
- Radio, AM/FM, Bluetooth®
- OTHER
- Counterweight, rear
- Winch, retrieval
- Heater, engine, coolant, 120 volt
- Starting aid, ether
- Extended life coolant, –50° C (–58° F)