Komatsubulldozersmall ( - d39)
Komatsu D20P-5(S/N 45001-UP (Straight Tilt Dozer))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D20P-5 (S/N 45001-UP) is a compact crawler dozer designed for utility earthmoving, grading, and light clearing. This straight tilt configuration features a 4D9ER-2N engine producing 39 hp (29.1 kW) at 2450 rpm. The machine operates within an approximate weight range of 8,333.5 lb (3,780 kg) and is part of the D20 series lineage, offering a direct drive transmission with 3 forward and 2 reverse gears.
Across the D20 series generations, changes in dash-number designations typically reflect updates to engine emissions tiers, hydraulic performance, and cab configurations. The D20P-5 remains significant in the used market due to its durable construction and suitability for small-scale land development. Its compact footprint and specialized straight tilt blade make it a preferred choice for finish work where larger machines cannot maneuver.
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 D20P-5(S/N 45001-UP (Straight Tilt Dozer)) specifications
Engine
| Engine Model | 4D92-2N |
| Number of Cylinders | 4 |
| Gross Power | 39 hp (29.1 kW) |
| Power Measured @ RPM | 2450 rpm |
| Displacement | 179.5 cu in (2.9 L / 2941.5 cc) |
Weights
| Operating Weight | 8333.5 lb (3780 kg) |
Dimensions
| Length w/ Blade | 10.54 ft in (3210 mm) |
| Length w/o Blade | 8.11 ft in (2470 mm) |
| Width Over Tracks | 5.98 ft in (1820 mm) |
| Height To Top of Cab | 7.17 ft in (2185 mm) |
| Ground Clearance | 1.24 ft in (375 mm) to 16 in (406.4 mm) |
| Length of Track on Ground | 5.53 ft in (1685 mm) to 6 ft in (1707 mm) |
Undercarriage
| Track Gauge | 4.3 ft in (1310 mm) to 52 in (1320.8 mm) |
| Standard Shoe Size | 20 in (510 mm) to 20.08 in (510.07 mm) |
| Number of Shoes Per Side | 37 |
| Number of Track Rollers Per Side | 5 |
| Track Pitch | 5 in (127 mm) to 5.4 in (137.16 mm) |
| Ground Pressure | 2.7 psi (18.62 kPa) |
Performance
| Transmission Type | Direct Drive (DD) |
| Number of Forward Gears | 3 |
| Number of Reverse Gears | 2 |
Blades
| Standard Blade Width | 7.2 ft in (2*2170 mm) |
| Standard Blade Height | 23.3 in (590 mm) |
| Blade Capacity | 1.2 yd³ (0.9 m³ to 1 m³) |
| Cutting Depth | 12.6 in (320 mm) |
Service Capacities
| Fuel Capacity | 56.78 L (15 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D20P-5(S/N 45001-UP (Straight Tilt Dozer)) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | 10W/30, 15W/40 | |
| Cooling System | Antifreeze Blue Concentrate or Red OAT 5 Year Antifreeze Coolant | |
| Fuel Tank | 56.78 L (15 gal) | |
| Transmission/Powertrain (Powershift Transmission + Bevel Gear/Steering Compartments) | 80W/90 GL4 or GL5 Gear Oils; 85W/140 Axle, Gear Oil; 80W90 EP GL5 | |
| Final Drives (each) | 80W/90 GL4 or GL5 Gear Oils; 85W/140 Axle, Gear Oil; 80W90 EP GL5 | |
| Hydraulic System/Tank | 10W, 10W/30, or 10W Hydraulic Oil; HVI 46; ISO HLP 68; HVI 32 or 46 | |
| Grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu D20P-5(S/N 45001-UP (Straight Tilt Dozer)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 50 h |
|
| Every 100 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the D20P-5(S/N 45001-UP (Straight Tilt Dozer)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil for metal particles or fuel dilution, which may indicate injector wear. Regularly analyze hydraulic oil to detect contamination before pump failure occurs. For the 4D92-2N engine, use appropriate 10W-30 or 15W-40 viscosity based on ambient temperature. Inspect track tension frequently to prevent premature undercarriage wear and maintain optimal ground pressure of approximately 2.7 psi.
Corrective & Common Repairs
Address steering clutch issues promptly; if the machine fails to turn, inspect the brake band and clutch housing assembly. If the engine exhibits high RPM or smoke, investigate fuel system malfunctions. For track-related spinning, evaluate the drive sprocket teeth for wear. When replacing cutting edges or end bits, ensure all mounting bolts are toraged to factory specifications to prevent blade instability during heavy pushing.
Overhaul & Rebuild Points
Plan major powertrain overhauls around the 2,000-hour milestone, focusing on transmission service and final drive inspection. Significant engine rebuilds should be considered if compression loss is detected in the 4D92-2N block. For long-term structural integrity, inspect the track frame and push beam for fatigue. Rebuilding steering clutches may require removing the top housing and seat linkages but avoids more complex final drive removal.
Seasonal & Environment Servicing
In dusty construction environments, increase air filter inspection frequency to prevent engine choking. During winter operations, utilize diesel anti-gel additives and check the cooling system for proper freeze protection. For summer use in high heat, monitor hydraulic oil temperature and ensure the radiator is clear of debris. Always change engine oil before long-term storage to prevent acid-driven corrosion of internal components.
D20P-5(S/N 45001-UP (Straight Tilt Dozer)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 09019-08035 | Wrench,Filter (For Add. Fuel Filter) | Fuel system 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.
D20P-5(S/N 45001-UP (Straight Tilt Dozer)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power malfunction | Faulty ECM power connections, blown fuses, or improper ground wiring | Inspect ECM power connections, fuses, and ground wires |
| E11 | Engine protection—output power reduced | High coolant temperature, low oil pressure, or restricted air filter | Check coolant temperature, oil pressure, and air filter condition |
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring harness damage, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA441 / CA442 | Battery voltage too low or too high | Alternator failure or faulty voltage regulator | Replace the alternator or battery; inspect the voltage regulator |
| CA451 / CA452 | Common rail pressure error | Malfunction in the fuel rail pressure sensor or issues within pump lines | Diagnose the fuel rail pressure sensor or inspect pump lines |
| AA10NX | Air cleaner clogging | Excessive dust or debris accumulation in the air filter | Replace the air filter element |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D20P-5(S/N 45001-UP (Straight Tilt Dozer)) attachments & work tools
Blades
Standard blade features a width of 2.17 m (7.2 ft) and height of 590 mm (23 in). Capacity is approximately 1.2 yd³ (0.86 m³) with a cutting depth of 320 mm (12.6 in), though dimensions vary by configuration/series.
Rippers
Ripper attachments are available for this model. Specific shank count or weight specifications are not documented for this exact serial range — verify with your dealer.
Winches
Not documented for this exact serial range — verify with your dealer.
Drawbars/counterweights
Not documented for this exact serial range — verify with your dealer.
Cab/ROPS guarding options
Steel cab configurations are noted in parts documentation. Specific forestry or waste-specific guarding options are not documented for this exact serial range — verify with your dealer.
Hydraulic arrangement notes
The machine utilizes a hydraulic system with components including blade lift cylinders, blade angle cylinders, and blade tilt cylinders. Specific flow rates or front/rear tool arrangements are not documented for this exact serial range — verify with your dealer.
All D20P-5(S/N 45001-UP (Straight Tilt Dozer)) assemblies by section
Every catalogued assembly group for the Komatsu D20P-5(S/N 45001-UP (Straight Tilt Dozer)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine Related Parts And Electrical System
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Air Cleaner Connection(#53407-)
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
| 10***60 | Boot | 1 |
| 10***70 | Pipe | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Battery
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***18 | Bolt | 4 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Electrical System
| 01***12 | Bolt (M8-1.25x12) | 2 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 13 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Engine Mounting Parts(#45001-53406)
| 01***10 | Bolt | 4 |
| 10***20 | Cushion,Rear | 8 |
| 11***20 | Washer | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Engine Mounting Parts(#53407-)
| 01***10 | Bolt | 4 |
| 10***20 | Cushion,Rear | 4 |
| 10***30 | Cushion,Front | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Fuel Control Lever
| 01***20 | Bolt,(Large Capacity Type) (Std) | 10 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***16 | Screw | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
| 07***20 | Cap Ass'Y | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Fuel Tank? Additional Strainer And Piping(#45001-51713)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 3 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Fuel Tank? Additional Strainer And Piping(#51714-)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 3 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Instrument Panel(#45001-53410)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Instrument Panel(#53411-)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Oil Cooler And Piping
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping(#45001-53406)
| 01***12 | Bolt (M8-1.25x12) | 3 |
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping(#53407-)
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
Guard
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Cross Bar
| 01***40 | Bolt,(Not Used With Cab) | 8 |
| 01***45 | Bolt,(For Slag Handling) | 16 |
| 01***45 | Bolt, Fuel Tank Mounting - Front Right | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Engine Bottom Guard
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***30 | Bolt,(For Center Guard) | 14 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Hitch
| 01***40 | Bolt | 2 |
| 01***45 | Washer,(Without R.O.P.S.) | 2 |
| 10***12 | Drawbar | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Loader Frame And Floor Plate(#45001-50000)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 10 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Loader Frame And Floor Plate(#50001-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 10 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Marks And Plates (Except Japan) (Chinese)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Ripper (Limited Supply) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Marks And Plates (Except Japan) (English)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Marks And Plates (Except Japan) (For Std Spec.)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Operator'S Seat
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 15 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Operator'S Seat (Op)
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 8 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 15 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Radiator Guard And Hood(#45001-53406)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 15 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Radiator Guard And Hood(#53407-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 11 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Guard : Rear Cover And Hydraulic Tank
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 25 |
Main Clutch And Transmission
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Counter Shaft And Gear
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Gear Shift Lever And Fork
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
| 01***20 | Screw,Set | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Inertia Brake
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 5 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Intermadiate Shaft And Gear
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Case(#45001-50000)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Case(#50001-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Pedal
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Plate
| 01***10 | Bolt, Mount Flasher | 6 |
| 01***16 | Bolt (Welded) | 6 |
| 01***16 | Bolt,(For Slag Handling) | 6 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Pump
| 04***15 | Ring, Snap | 1 |
| 07***01 | Pump Ass'Y (Fal10) | 1 |
| 07***60 | Seal,Oil | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Pump Drive And Relief Valve
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Clutch Yoke
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Main Shaft And Gear
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***10 | Nut | 1 |
| 01***10 | Nut | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Transmission Case
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Main Clutch And Transmission : Universal Joint
| 01***40 | Bolt,(For Position Fixing) | 8 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 8 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 1 |
Optional Parts
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Back-Up Alarm
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***20 | Screw | 4 |
| 01***05 | Nut (Welded) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Canopy
| 01***25 | Bolt - Rear Guard Mounting | 8 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Head Guard
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***40 | Bolt,(Not Used With Cab) | 18 |
| 01***75 | Bolt,Dust | 24 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Lining Blade
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 13 |
| 01***36 | Washer,Radio Controlled Slag Handling | 13 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 13 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Rops Canopy
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***40 | Bolt,(Not Used With Cab) | 26 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Lower) | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Steering Lever And Linkage (For Lever Steering)(#45001-50000)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***06 | Nut? L.H. Thread,R.H. Thread | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Steering Pedal And Linkage (For Lever Steering)(#45001-50000)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Steering Pedal And Linkage (For Pedal Steering)(#50001-51713)
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 6 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Optional Parts : Steering Pedal And Linkage (For Pedal Steering)(#51714-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 6 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
Steering System And Final Drive
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Bevel Gear And Shaft
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 6 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Brake Band
| 01***35 | Bolt,(For Pedal Steering) | 8 |
| 01***42 | Washer,Spring (For Pedal Steering) | 8 |
| 01***23 | Plain Washer | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Brake Pedal And Linkage (For Lever Steering)(#50001-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Final Drive Gear
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***20 | Bolt,(Used When Towing Winch) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Final Drive Housing
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 26 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 16 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Parking Brake Lever
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***35 | Bolt,(Without Auto Priming System) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Sprocket And Shaft
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 24 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Case And Main Frame
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Case Cover
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 20 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Clutch
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***90 | Bolt (M10-1.50x90) | 8 |
| 01***10 | Nut,(For Slag Handling) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Lever And Linkage (For Lever Steering)(#50001-51713)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***06 | Nut? L.H. Thread,R.H. Thread | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Lever And Linkage (For Lever Steering)(#51714-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***06 | Nut? L.H. Thread,R.H. Thread | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Oil Piping(#51714-)
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Pedal And Linkage (For Pedal Steering)(#45001-50000)
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 6 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Valve (For Pedal Steering)(#51714-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 8 |
| 04***16 | Pin, Spring | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Valve And Piping(#45001-51713)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Steering System And Final Drive : Steering Valve(#51714-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 8 |
| 04***16 | Pin, Spring | 2 |
Tool And Kit
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Tool And Kit : Tool
| 07***00 | Pump,Grease | 1 |
| 07***00 | Pump,Grease | 1 |
| 07***00 | Pump,Grease | 1 |
Track
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Carrier Roller
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Front Idler
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***08 | Nut,R.H. Thread | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Recoil Spring
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 8 |
| 01***35 | Bolt,(For Pedal Steering) | 20 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Track Frame(#45001-47163)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 16 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 26 |
| 01***25 | Bolt,(For Slag Handling) | 36 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Track Frame(#47164-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***25 | Bolt,(For Slag Handling) | 36 |
| 01***35 | Bolt,(For Pedal Steering) | 16 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Track Roller
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Lower) | 56 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Track : Track Shoe(#45003-)
| 01***18 | Nut? Shoe (Kit) | 296 |
| 10***01 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 10***20 | Link,Track? L.H | 74 |
Work Equipment
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment : Tilt Blade
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 16 |
| 01***65 | Bolt | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment : Tilt Blade Linkage(#45001-53409)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***55 | Bolt,(For Long Track) | 6 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment : Tilt Blade Linkage(#53410-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***30 | Bolt,(For France Noise Suppression) | 8 |
| 01***50 | Bolt, Radiator To Frame | 6 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment : Tilt Frame
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Lower) | 12 |
| 01***15 | Bolt | 2 |
Work Equipment Control System
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Blade Lift Cylinder
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Blade Tilt Cylinder
| 01***16 | Bolt (Welded) | 1 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***19 | Washer,(Not Used With Ventilator) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Control Lever
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***16 | Screw | 5 |
| 01***03 | Nut? L.H. Thread,L.H. Thread | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Control Valve (1/2)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Control Valve (2/2)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 2 |
| 07***34 | O-Ring, O-Ring,Drain Plug? R.H. Half Tank | 2 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Piping (Pump - Valve)
| 01***45 | Bolt,(S6d155-4b) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Piping (Valve - Lift Cylinder)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Piping (Valve - Tilt Cylinder)(#45001-50000)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 11 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Piping (Valve - Tilt Cylinder)(#50001-)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 11 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 3 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Pump(#45001-50000)
| 04***15 | Ring, Snap | 1 |
| 70***00 | Pump Ass'Y,(See Fig. 3601a) | 1 |
| 70***10 | Seal, Oil | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Oil Pump(#50001-)
| 04***15 | Ring, Snap | 1 |
| 70***10 | Seal, Oil | 1 |
| 70***10 | Pump Ass'Y,(See Fig. 3601) | 1 |
Komatsu : D20p-5(S/N 45001-Up (Straight Tilt Dozer)) : Work Equipment Control System : Hydraulic Tank And Filter
| 01***16 | Bolt,(For Slag Handling) | 7 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 3 |
D20P-5(S/N 45001-UP (Straight Tilt Dozer)) serial number reference
The PIN plate is located on the front frame casting, typically on the operator's left side near the radiator support. To read the prefix, identify the alphanumeric characters preceding the numeric build sequence on the machine plate or chassis engraving. Verify the specific variant (Straight Tilt vs. Power Angle Tilt) against the serial number, as the D20P-5 (Straight Tilt) begins at S/N 45001, while other D20P-5 variants may start at different sequences.
| Prefix | Identifies | Notes |
|---|---|---|
| D20P-5 | Straight Tilt Dozer | Standard configuration for serial range 45001-UP. Distinct from the D20P-5A (Power Angle Tilt) and D20P-5(JPN) variants, which utilize different serial sequences and blade capabilities. |
Frequently asked questions
What engine is installed in the Komatsu D20P-5?
The machine is powered by a Komatsu 4D92-2N engine with a displacement of approximately 179.5 cu in (2,941.5 cc).
What is the operating weight of this dozer?
The operating weight is approximately 8,333.5 lb (3,780 kg).
What model replaced the D20P-5?
Specific successor models vary by region and configuration; however, the D20 series follows a dash-number generation lineage representing subsequent technological updates.
What D20P-5(S/N 45001-UP (Straight Tilt Dozer)) owners discuss
What are the known steering clutch issues on the D20P-5?
A common failure involves the left track staying engaged, which prevents forward motion and limits movement to left turns only. When replacing these components, the clutches and brake bands can be removed as a single assembly from the top of the machine after unbolting the housing and removing the seat and linkages; notably, the final drives do not require removal for this procedure.
How does the D20P-5 perform regarding traction in loose soil?
The stock tracks often lack sufficient grip, frequently causing the machine to spin at high throttle. Operators commonly modify the undercarriage by welding rebar to the pads or using flat bar to create swamp tracks. For dry surfaces, rubber tracks with tractor-style tread have been noted to provide better grip than the original configuration.
What engine symptoms should be monitored on this series?
Users have reported instances of high RPM accompanied by engine misfiring and visible smoke. The 4D92-2N engine (179.5 cu in / 2,941 cc) provides approximately 39 hp (29 kw) at 2,450 rpm.
What are the typical fuel consumption and capacity expectations?
The machine features a 56.78 L (15 gal) fuel tank. Under heavy duty cycles at full throttle, the fuel supply typically lasts between 8 to 10 hours.
What should be checked when buying a used D20P-5 (S/N 45001-UP)?
Verify the steering clutch functionality by testing both left and right engagement. Inspect the undercarriage for uneven wear, specifically checking the 37 shoes per side and track pitch (5 in / 127 mm). Check the engine for smoke or irregular idling, and confirm if any traction modifications, such as welded rebar, have been applied to the tracks.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific D20P-5(S/N 45001-UP (Straight Tilt Dozer)) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.