Komatsubulldozersmall ( - d39)
Komatsu DDM020_5L(S/N 60001-UP (D20A-6))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu DDM020-5L (S/N 60001-UP, D20A-6) is a mid-size crawler bulldozer designed for heavy earthmoving and construction applications. Operating weights for this class typically range from 13.8 to 112.62 tonnes, with specific configurations varying by attachment and undercarriage setup. The DDM020-5L belongs to the fifth-generation D-series lineage, succeeding earlier D20 models and preceding the D20Q-5 and D20P-5 variants. It is available in standard and low-ground-pressure (LGP) configurations to suit diverse terrain conditions.
Across the D-series generations, Komatsu integrated advanced hydraulic systems and more efficient diesel engines to meet evolving emissions standards while maintaining high durability. The DDM020-5L remains significant in the used and parts market due to its robust powertrain and widespread availability of aftermarket undercarriage components. Its design emphasizes cost-efficiency through a unique undercarriage structure and reliable torque converter transmission, making it a staple for fleet managers seeking balanced performance and maintenance accessibility.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Komatsu DDM020_5L(S/N 60001-UP (D20A-6)) specifications
Engine
| Engine Model | D20A-6 |
| Emissions Tier | Tier 4 Final / Stage V |
Weights
| Operating Weight (Standard) | Not documented for this exact serial range — verify with your dealer |
| Operating Weight (LGP) | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Track Shoe Width | 510 mm (20.1 in) |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
Performance
| Travel Speed (Max) | 7.4 km/h (4.6 mph) |
| Drawbar Pull | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | 0.24 kg/cm² (3.4 psi) |
Blades
| Blade Capacity | Not documented for this exact serial range — verify with your dealer |
Service Capacities
| Cooling System Fluid | Komatsu Super Coolant AF-NAC (JIS K 2234-1987 / ASTM 3306) |
| Engine Oil | Komatsu TO10 (SAE 10W) or TO30 (SAE 30W) API CD |
| Hydraulic Oil | Komatsu HO56 (ISO VG46) KES 07.841.1 |
| Powertrain Oil | Komatsu TO10 (SAE 10W) or TO30 (SAE 30W) KES 07.868.1 |
| Axle Oil | Komatsu AXO80 (SAE 80WZF) API GL-4 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
DDM020_5L(S/N 60001-UP (D20A-6)) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | 13 l (3.4 gal) | Komatsu Diesel Engine Oil (SAE 10W-30 or 15W-40 API CD or higher; ISO VG 32-46 hydraulic equivalent for cold starts if specified by ambient temp, typically SAE 5W-30 below -10°C / 14°F) |
| Cooling System | 13 l (3.4 gal) | Komatsu Super Coolant AF-NAC (50% mix) or equivalent ethylene glycol-based coolant meeting ASTM D3306 |
| Fuel Tank | Not documented for this exact serial range — verify with your dealer | Ultra-low sulfur diesel (ULSD) |
| Transmission/Powertrain (Powershift Case) | Not documented for this exact serial range — verify with your dealer | Komatsu Powertrain Oil TO10 (SAE 10W) or TO30 (SAE 30W) per ambient temperature |
| Transmission/Powertrain (Bevel Gear/Steering) | Not documented for this exact serial range — verify with your dealer | Komatsu Axle Oil AXO80 (SAE 80W-90 API GL-4) |
| Final Drives (each) | Not documented for this exact serial range — verify with your dealer | Komatsu Axle Oil AXO80 (SAE 80W-90 API GL-4) |
| Hydraulic System/Tank | Not documented for this exact serial range — verify with your dealer | Komatsu Hydraulic Oil HO56 (ISO VG 46) or HO68 (ISO VG 68) per ambient temperature |
| Pivot Shaft | Not applicable | Not applicable |
| Grease Specs | Not applicable | Lithium complex base grease, NLGI #2, EP grade |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu DDM020_5L(S/N 60001-UP (D20A-6)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the DDM020_5L(S/N 60001-UP (D20A-6)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA oil analysis at every 500-hour interval to monitor engine wear metals and hydraulic contamination. Check coolant SCA levels at 500 hours to prevent scaling and corrosion in the D20A-6 engine block. Monitor hydraulic oil particle count and viscosity at 1000 hours to detect pump or valve wear early. Track transmission oil condition at 2000 hours to ensure torque converter integrity. Use KOMTRAX telematics to correlate fluid degradation with load frequency and operating hours for precise service timing.
Corrective & Common Repairs
Address frequent undercarriage wear by measuring roller and sprocket dimensions at 1000-hour intervals. Replace hydraulic return filters at 500 hours to prevent contamination of sensitive valves. Inspect final drive seals and oil levels at 1000 hours to avoid gear damage. Check blade cutting edge and end bit bolt torque at 2000 hours to maintain grading efficiency. Inspect turbocharger connections and hoses for leaks during the 1000-hour structural check. Replace worn belts and clamps during the 2000-hour comprehensive evaluation.
Overhaul & Rebuild Points
Plan major powertrain overhaul around 4000-5000 hours based on KOWA analysis and final drive wear measurements. Inspect swing machinery oil and bearings at 1000-hour intervals for early signs of failure. Evaluate the D20A-6 engine compression and valve clearances at 2000 hours to determine top-end health. Check structural welds on the frame and push arms during the 1000-hour inspection. Monitor hydraulic pump pressure and flow rates to determine pump overhaul necessity. Assess undercarriage wear to decide between partial or full track assembly replacement.
Seasonal & Environment Servicing
In cold climates, verify coolant freeze protection and use appropriate viscosity engine oil for startup. Clear debris from radiator and oil cooler fins daily to prevent overheating in dusty environments. Inspect air filter restriction indicator frequently in high-dust conditions and clean or replace as needed. Check track tension regularly on soft ground to prevent excessive sagging or digging. Drain water from the fuel separator daily in humid conditions to prevent microbial growth. Inspect hydraulic hoses for UV damage and cracking in high-sunlight regions.
DDM020_5L(S/N 60001-UP (D20A-6)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 103-60-23240 | Cartridge,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 113-60-43320 | Cartridge,Hydraulic Oil Filter (D31s) | Hydraulic service | Check fitment → |
| 113-60-43321 | Cartridge,Hydraulic Oil Filter (D31s) | Hydraulic service | Check fitment → |
| 08036-01414 | Clip,(For Add.Filter)(Except Japan) | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
DDM020_5L(S/N 60001-UP (D20A-6)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM hardware or software failure | Replace or reprogram the ECM |
| CA441 | Battery voltage too low | Weak battery, bad alternator, or loose connections | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator overcharging | Replace the alternator or battery; check the voltage regulator |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or pump lines |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| B@BCNS | Engine coolant overheating | Low coolant, blocked radiator, or fan belt failure | Check radiator fins, fan belt, and coolant level |
| B@HANS | Hydraulic oil overheating | Dirty hydraulic filter, low oil level, or cooler fan issue | Change hydraulic filter and oil; check cooler fan |
| AB00KE | Charging voltage too low | Alternator failure or loose drive belt | Replace the alternator or tighten the belt |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
DDM020_5L(S/N 60001-UP (D20A-6)) attachments & work tools
Blades
The DDM020_5L(S/N 60001-UP (D20A-6)) bulldozer supports standard (S), semi-universal (SU), and angle (A) blade configurations, with VPAT (Variable Pitch Angle Tilt) availability varying by specific factory configuration or series build date. Typical widths and capacities for this class are not explicitly documented in the provided source text; verify exact dimensions with your dealer.
Rippers
Multi-shank and single-shank ripper options are available for this class, with weights varying by configuration and series. The source text does not provide specific weight figures or shank counts for the DDM020_5L(S/N 60001-UP (D20A-6)); consult the factory spec sheet for exact ripper specifications.
Winches
Towing winch options for this class are not detailed in the provided source text. Determine the appropriate winch class and capacity by referencing the Komatsu shop manual for this range or contacting an authorized dealer.
Drawbars/Counterweights
Drawbar and counterweight specifications for the DDM020_5L(S/N 60001-UP (D20A-6)) are not explicitly documented in the provided source text. Verify compatibility and weights with your dealer or the operation and maintenance manual.
Cab/ROPS Guarding
Forestry and waste configuration cab and ROPS guarding options for this model are not detailed in the provided source text. Check the factory spec sheet or contact your dealer for specific guarding requirements.
Hydraulic Arrangement
Hydraulic arrangement notes for front and rear tools on the DDM020_5L(S/N 60001-UP (D20A-6)) are not explicitly documented in the provided source text. Refer to the Komatsu shop manual for this range for detailed hydraulic circuit information.
All DDM020_5L(S/N 60001-UP (D20A-6)) assemblies by section
Every catalogued assembly group for the Komatsu DDM020_5L(S/N 60001-UP (D20A-6)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Control System : Brake Pedal (For Lever Steering) (For Trimming Dozer) (For Russian)(#63469-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Control System : Inching Pedal (For F3-R3 Transmission) (For Russian)(#63469-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Control System : Oil Cooler Piping (For Trimming Dozer)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
Engine Related Parts And Electrical System
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Back-Up Alarm (For Trimming Dozer)
| 01***16 | Bolt (Welded) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Electrical System (For Trimming Dozer)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Fuel Tank And Piping (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Instrument Panel (For Trimming Dozer) (For Russian)(#63469-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 1 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Oil Pan Heater (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***12 | Screw | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Engine Related Parts And Electrical System : Radiator And Piping (For Trimming Dozer)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Guard
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Car Heater (1/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Car Heater (2/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
| 08***14 | Clip,(Without Ripper Point Light) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Cross Bar (For Trimming Dozer)
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***60 | Bolt,(For Ripper) | 16 |
| 01***45 | Bolt | 8 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Loader Frame And Floor Plate (For Trimming Dozer) (With Pors Cab)(For Russian)(#63469-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Radiator Guard And Hood (For Trimming Dozer) (For Russian)(#63469-)
| 01***30 | Bolt,(For Center Guard) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Rear Cover And Hydraulic Tank (For Trimming Dozer) (For Russian)(#63469-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Rear Cover And Hydraulic Tank (For Trimming Dozer)(#60001-63878)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Rear Cover And Hydraulic Tank (For Trimming Dozer)(#63879-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt,(With Service Valve R.H.) | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Rear Guard (For Trimming Dozer) (For Russian)(#63469-)
| 01***65 | Bolt (D65p) | 10 |
| 01***45 | Washer,(Without R.O.P.S.) | 10 |
| 10***10 | Guard,Rear | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (1/6) (Body) (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (2/6) (Front And Rear Window) (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (3/6) (Door And Side Window) (For Trimming Dozer) (For Russian)(#63469-)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***45 | Bolt | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (4/6) (Interior Trim) (For Trimming Dozer) (For Russian)(#63469-)
| 01***25 | Bolt,(For Automatic) | 24 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 15 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 39 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (5/6) (Electrical System 1/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 8 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***10 | Screw,(For Lighter) | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab (6/6) (Electrical System 2/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***12 | Screw,(Additional Sun Visor) | 1 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab Mounting Parts (1/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 6 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Steel Cab Mounting Parts (2/2) (For Trimming Dozer) (For Russian)(#63469-)
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 26 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 34 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Guard : Under Guard (For Trimming Dozer) (For Russian)(#63469-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***00 | Bolt | 2 |
Main Clutch?Transmission? Steering And Final Drive
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Main Clutch?Transmission? Steering And Final Drive : Final Drive Gear (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Main Clutch?Transmission? Steering And Final Drive : Steering Case And Main Frame (For Trimming Dozer) (For Russian)(#63469-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 11 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 11 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Main Clutch?Transmission? Steering And Final Drive : Steering Clutch (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***10 | Nut (K10) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Main Clutch?Transmission? Steering And Final Drive : Universal Joint (For Trimming Dozer)
| 01***40 | Bolt,(With Air Conditioner) | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 1 |
Mark Plate? Tool And Kit
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Mark Plate? Tool And Kit : Marks And Plates (Russian) (For Trimming Dozer)(#63469-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Name (Limited Supply) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Mark Plate? Tool And Kit : Spare Parts (For Trimming Dozer) (For Russian)(#63469-)
| 04***46 | V-Belt,Cooling Fan | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
Track
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Recoil Spring (For Trimming Dozer)
| 01***16 | Bolt (With Air Heater & Conditioner) | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Frame (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***25 | Bolt,(For Rubber Shoe) | 24 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Roller (For Trimming Dozer)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 48 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Shoe (Lubricate Type) (Single Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 642 |
| 07***22 | Plug,Large | 152 |
| 07***21 | Plug,(Small) | 152 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Shoe (Master Pin Type) (Semi-Double Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 362 |
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Shoe (Master Pin Type) (Single Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 658 |
| 10***06 | Track Shoe Ass'Y | 1 |
| 10***07 | Track Shoe Ass'Y | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Shoe (Master Pin Type) (Single Grouser)
| 01***18 | Nut? Shoe (Kit) | 658 |
| 10***07 | Track Shoe Ass'Y | 1 |
| 10***08 | Track Shoe Ass'Y | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Track : Track Shoe (Master Pin Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 658 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 152 |
Work Equipment
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment : Hydraulic Piping (Tilt Cylinder Line) (Dozer Side) (For Trimming Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 18 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 18 |
| 01***32 | Washer,(With Auto Emergency Steering) | 16 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment : Trimming Cylinder
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***65 | Ring,Back-Up (Kit) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment : Trimming Dozer Blade
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 10 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment : Trimming Dozer Frame
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 2 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 24 |
Work Equipment Control System
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Control Valve (1/2) (For Trimming Dozer)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Control Valve (2/2) (For Trimming Dozer)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Hydraulic Piping (Lift Cylinder Line) (For Trimming Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Hydraulic Piping (Tank To Pump To Valve) (For Trimming Dozer)
| 01***45 | Screw | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Hydraulic Piping (Tilt Cylinder Line) (Chassis Side) (For Trimming Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Hydraulic Tank And Filter (For Trimming Dozer)
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt? Wing,Inspection Cover | 1 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Hydraulic Tank And Filter (For Trimming Dozer) (For Russian)(#63469-)
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 7 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Lift Cylinder (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Ddm020_5l(S/N 60001-Up (D20a-6)) : Work Equipment Control System : Work Equipment Control Lever (For Trimming Dozer) (For Russian)(#63469-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
DDM020_5L(S/N 60001-UP (D20A-6)) serial number reference
The Product Identification Number (PIN) plate is located on the front frame casting, typically on the operator's left side near the radiator support. Read the first three characters of the model designation (e.g., DDM) to identify the prefix.
| Prefix | Identifies | Notes |
|---|---|---|
| DDM020-5L | Standard | S/N 60001-UP (D20A-6). Factory parts catalog identifies this as the primary configuration for this serial range. Steering system details not explicitly documented for this specific prefix in available references; verify with dealer. |
Frequently asked questions
What engine does the DDM020-5L (S/N 60001-UP) use?
The DDM020-5L (S/N 60001-UP, D20A-6) is equipped with a Komatsu D20A-6 series diesel engine.
What is the operating weight of the Komatsu DDM020-5L?
Operating weight varies by configuration and undercarriage setup. Komatsu bulldozers in this class generally range from 13.8 to 112.62 tonnes, with specific values depending on the exact serial range and attachment package.
What model replaced the Komatsu DDM020-5L?
The DDM020-5L is part of the fifth-generation D-series. Successors in the D20 class include the D20Q-5 and D20P-5 variants, which feature updated emissions systems and refined powertrains.
What DDM020_5L(S/N 60001-UP (D20A-6)) owners discuss
What are the typical powertrain and hydraulic behaviors for the Komatsu DDM020_5L(S/N 60001-UP (D20A-6))?
The machine is noted for smooth operation and high fuel efficiency. However, the hydraulic pump and engine are closely linked; if the pump fails, the engine often follows shortly after. Owners report that the line is designed to wear out complete machines simultaneously, which negatively impacts resale value. Hydraulic performance may degrade when hot due to internal leakage in the pump, main control valve, or cylinders if oil viscosity drops excessively. Slow heating of the hydraulic system can indicate a malfunctioning main safety valve requiring grinding or repair. Dash 6 machines in this lineage are known for specific valve problems, particularly on smaller models like the PC150 and PC120, though pump and valve combinations have undergone significant redesign in later series. Variations in hydraulic pressure and flow exist by configuration/series.
What undercarriage or wear patterns are typical for this machine type?
Undercarriage components such as track pads, bushings, and bearings are subject to significant wear and tear. Worn bushings lead to noise and vibration, while worn bearings can cause premature track failure. The undercarriage design is a key factor in the machine's cost-efficiency. Track tension must be monitored regularly; repeated loosening indicates issues with the adjuster or component wear. Mud or debris packed into the undercarriage can cause mechanical resistance and uneven travel. The machine's operating weight class (Mid-Size) influences ground pressure and undercarriage selection.
What are the engine quirks per the D20A-6 series?
The D20A-6 engine is a Komatsu unit, not a Yanmar. Older Komatsu engines, such as the 95 series, did not have liners, but the D20A-6 is a distinct configuration. Common engine issues include loss of power under load, increased fuel usage, and overheating. These symptoms often signal airflow restriction, injector wear, or failing fuel delivery components. Contamination, extended service intervals, and low-quality fuel accelerate wear. Exhaust entering the cooling system is a known failure mode in older Komatsu engines, requiring sleeve inspection. Engine performance issues dominate serious failure lists for this class.
What are the common electrical and sensor issues?
Komatsu equipment relies heavily on electronic control systems; thus, a single faulty sensor or unstable power supply can trigger multiple warning signals. Owners report intermittent starting, dashboard failure, and random shutdowns. Common error codes include CA144/CA145 (Coolant Temp Sensor High/Low Error), CA153/CA154 (Charge Air Temp Sensor High/Low Error), CA263/CA265 (Fuel Temp Sensor High/Low Error), and CA441/CA442 (Battery Voltage Low/High Error). Other frequent codes involve the KDPF Delta Pressure Sensor (CA1879/CA1881), EGR Valve Position Sensor (CA2271/CA2272), and Turbo Speed Sensor (CA595/CA687). The ECM may also report internal failures (CA343) or datalink timeouts (CA1633). Intermittent electrical faults often stem from poor grounds or connector issues.
What should be checked when buying a used DDM020_5L(S/N 60001-UP (D20A-6))?
Verify the exact serial-prefix specification sheet and installed attachment package, as these change weight, reach, and fuel use. Check the hydraulic system's fluids, filters, and screen for plugging, which is a common cause of low oil level symptoms. Inspect the main clutch and steering clutches/brakes for proper adjustment, as dealer information can be conflicting or expensive. Test the machine cold and hot to identify hydraulic weakness that appears only at operating temperature. Check for exhaust in the cooling system if the engine has been serviced. Verify the condition of the undercarriage, including track tension and roller wear. Ensure the battery and charging system are robust, as weak batteries cause prolonged downtime. Be aware that parts availability for gray market or older Komatsu models can be difficult and expensive.
What is a safety-critical fix related to the hydraulic system?
The main safety valve is critical for the smooth operation of the entire hydraulic system. If the machine exhibits slow heating or erratic hydraulic behavior, the main safety valve may need grinding or repair. Have your dealer verify the valve's operation and pressure settings before resuming heavy work.
What is a safety-critical fix related to the engine cooling system?
Exhaust entering the cooling system is a severe failure mode that can lead to catastrophic engine damage. If coolant is contaminated or the system becomes highly pressurized, inspect the cylinder head and sleeves for leaks. Have your dealer verify the integrity of the cooling system and engine block before further operation.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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