Kubota D905 Engine Specs
The Kubota D905 is a 0.9 L, 54.8 cu-in, 898 cc straight-three, water-cooled, naturally aspirated diesel engine from the Kubota 05-series.
The Kubota D905 engine has a spherical type сombustion сhamber with a Bosch MD type mini fuel injection pump, glow plug, and mini injection nozzle.
The Kubota D905 engine compression ratio rating is 22.0:1 for the early version (D905-B(E)) or 23.0:1 for the later versions (EPA Tier 2, 3, 4). The Kubota D905 engine cylinder bore, and the piston stroke are 72.0 mm (2.83 in) and 73.6 mm (2.90 in), respectively.
The Kubota D905 diesel engine delivered up to 23.8 PS (23.5 HP, 17.5 kW) at 3,600 rpm of net horsepower and 52.8 N·m (5.4 kg·m, 38.9 ft·lb) at 2,400 rpm of torque.
The breakdown of the engine code is as follows:
- D – 3-cylinders
- 9 – Approximate displacement 900 cc
- 05 – 05-series
Kubota D905 (0.9 L) Diesel Engine Specifications
Engine Specifications
| Engine code | D905 |
| Layout | Straight-3, vertical |
| Fuel type | Diesel |
| Production | – |
| Displacement | 0.9 L, 898 cm3 (54.8 cu in) |
| Fuel injection pump | Bosch MD type mini fuel injection pump |
| Fuel nozzle | Mini nozzle |
| Starting system | Electric starting with 12V starter |
| Starting support device | Glow plug in combustion chamber |
| Governor | All speed mechanical governor |
| Power adder | None |
| Max. Horsepower | 23.8 PS (17.5 kW; 23.5 HP) at 3,600 rpm* |
| Torque output | 52.8 N·m (5.4 kg·m, 38.9 ft·lb) at 2,400 rpm* |
| Firing order | 1-2-3 |
| Dimensions (L x W x H): | 498 x 397 x 609 mm (19.6 x 15.6 x 24 in) |
| Weight | 95 kg (210 lbs) |
Cylinder head
| Valve Arrangement: | SOHC, gear drive | |
| Valves: | 6 (2 valves per cylinder) | |
| Valve head diameter: | INTAKE | – |
| EXHAUST | – | |
| Valve length: | INTAKE | 101.5 mm (3.99 in) |
| EXHAUST | 101.5 mm (3.99 in) | |
| Valve stem diameter: | INTAKE | 6.960-6.975 mm (0.274-0.2746 in) |
| EXHAUST | 6.960-6.975 mm (0.274-0.2746 in) | |
| Valve spring free length: | INTAKE | 37.0-37.5 mm (1.4567-1.4764 in) |
| EXHAUST | 37.0-37.5 mm (1.4567-1.4764 in) | |
| Camshaft lobe height: | INTAKE | 28.80 mm (1.1339 in) |
| EXHAUST | 29.00 mm (1.1417 in) | |
| Camshaft journal diameter: | 35.934-35.950 mm (1.4147-1.4154 in) | |
Cylinder block
| Compression ratio: | 22.0:1 or 23.0:1 | |
| Cylinder bore: | 72.0 mm (2.83 in) | |
| Piston stroke: | 73.6 mm (2.9 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Cylinder inner diameter: | 72.000-76.019 mm (2.8346-2.9929 in) | |
| Piston skirt diameter | – | |
| Piston ring side clearance: | Second | 0.085-0.112 mm (0.0033-0.0044 in) |
| Oil | 0.020-0.055 mm (0.0008-0.0022 in) | |
| Piston ring end gap: | Top | 0.250-0.400 mm (0.0098-0.0157 in) |
| Second | 0.250-0.400 mm (0.0098-0.0157 in) | |
| Oil | 0.250-0.400 mm (0.0098-0.0157 in) | |
| Piston pin outer diameter | 22.002-22.011 mm (0.8662-0.8666 in) | |
| Crankshaft main journal diameter: | 1,2: 47.934-47.950 mm (1.8872-1.8878 in) 3: 51.921-51.940 mm (2.0442-2.0448 in) |
|
| Crankpin diameter: | 39.959-39.975 mm (1.5732-1.5738 in) | |
Maintenance Data
| Valve clearance (HOT) | |
| Intake valve | 0.145-0.185 mm (0.0057-0.0073 in) |
| Exhaust valve | 0.145-0.185 mm (0.0057-0.0073 in) |
| Compression pressure | |
| Standard | D905-B(E): 2.84 to 3.23 MPa, 29.0 to 33.0 kgf/cm2, 412 to 469 psi Other: 3.73 to 4.11 MPa, 38.0 to 42.0 kgf/cm2, 541 to 597 psi |
| Oil system | |
| Recommended engine oil | CF or higher |
| SAE Viscosity Number | SAE 10W-30, 10W-40 |
| Engine oil capacity | 101 mm: 4.0 L (4.23 US. qt, 3.52 Imp. qt.) 125 mm: 5.1 L (5.40 US. qt, 4.50 Imp. qt.) |
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Final Words
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