Kubota D905

Kubota D905The Kubota D905 is a 0.9 L (898 cc, 54.8 cu-in) straight-three, water-cooled naturally aspirated diesel engine from Kubota 05-series.

The Kubota D905 engine has a spherical type сombustion сhamber with glow plug, Bosch MD type mini fuel injection pump, and mini injection nozzle. The 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 cylinder bore and the piston stroke are 72.0 mm (2.83 in) and 73.6 mm (2.90 in), respectively. The D905 diesel engine produced up to 23.8 PS (17.5 kW; 23.5 HP) 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.

General information

Engine Specifications
Engine codeD905
LayoutStraight-3, vertical
Fuel typeDiesel
Production
Displacement0.9 L, 898 cm3 (54.8 cu in)
Injection pumpFuel injection pump
Power adderNone
Max. Horsepower23.8 PS (17.5 kW; 23.5 HP) at 3,600 rpm*
Torque output52.8 N·m (5.4 kg·m, 38.9 ft·lb) at 2,400 rpm*
Firing order1-2-3
Dimensions (L x W x H):498 x 397 x 609 mm (19.6 x 15.6 x 24 in)
Weight95 kg (210 lbs)

*-may be differ depending on engine modification

Cylinder block

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:Top0.085-0.112 mm (0.0033-0.0044 in)
Second0.020-0.055 mm (0.0008-0.0022 in)
Piston ring end gap:Top0.250-0.400 mm (0.0098-0.0157 in)
Second0.250-0.400 mm (0.0098-0.0157 in)
Oil0.250-0.400 mm (0.0098-0.0157 in)
Piston pin outer diameter22.002-22.011 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)

Cylinder head

Cylinder head (Almera N15 specs)
Valve Arrangement:SOHC, gear drive
Valves:6 (2 valves per cylinder)
Valve head diameter:INTAKE
EXHAUST
Valve length:INTAKE101.5 mm (3.99 in)
EXHAUST101.5 mm (3.99 in)
Valve stem diameter:INTAKE6.960-6.975 mm (0.274-0.2746 in)
EXHAUST6.960-6.975 mm (0.274-0.2746 in)
Valve spring free length:INTAKE37.0-37.5 mm (1.4567-1.4764 in)
EXHAUST37.0-37.5 mm (1.4567-1.4764 in)
Camshaft lobe height:INTAKE28.80 mm (1.1339 in)
EXHAUST29.00 mm (1.1417 in)
Camshaft journal diameter:35.934-35.950 mm (1.4147-1.4154 in)

Maintenance data

Valve clearance (HOT)
Intake valve0.145-0.185 mm (0.0057-0.0073 in)
Exhaust valve0.145-0.185 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 oilCF or higher
SAE Viscosity NumberSAE 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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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

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