Kubota D1105 (1.1 L) Diesel Engine: Specs, Review & Service Data

Kubota D1105 Engine Specs

The Kubota D1005 is a 1.1 L 68.5 cu-in, 1,123 cc, straight-three, water-cooled naturally aspirated diesel engine from the Kubota 05 series.

The Kubota D1105 engine has a spherical type сombustion сhamber with a Bosch MD type mini fuel injection pump, glow plug, and mini injection nozzle.

The Kubota D1105 engine compression ratio rating is 22.0:1 for the early version (D1105-B(E)) or 24.0:1 for the later versions (EPA Tier 2, 3, 4). The cylinder bore and the piston stroke are 3.07 in (78.0 mm ) and 3.09 in (78.4 mm), respectively.

The Kubota D1105 diesel engine delivered up to 25.4 PS (18.7 kW; 25.0 HP) at 3,000 rpm of horsepower and 68.3 N·m (7 kg·m, 50.3 ft·lb) at 2,000 rpm of torque.

The breakdown of the engine code is as follows:

D – 3-cylinders
11 – Approximate displacement 1,100 cc
05 – 05-series

Kubota D1105 (1.1 L) Diesel Engine Specifications

Engine Specs

Engine code	D1105
Layout	Straight-3, vertical
Fuel type	Diesel
Production	–
Displacement	1.1 L, 1,123 cm³ (68.5 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	25.4 PS (18.7 kW; 25.0 HP) at 3,000 rpm*
Torque output	68.3 N·m (7 kg·m, 50.3 ft·lb) at 2,000 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 block

Compression ratio:		22.0:1 or 24.0:1
Cylinder bore:		78.0 mm (3.07 in)
Piston stroke:		78.4 mm (3.09 in)
Number of piston rings (compression / oil):		2 / 1
Cylinder inner diameter:		78.00-78.019 mm (3.0709-3.0716 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	0.300-0.450 mm (0.0118-0.0177 in)
	Second	0.300-0.450 mm (0.0118-0.0177 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)

Cylinder head

Valve Arrangement:		SOHC, gear drive
Valves:		6 (2 valves per cylinder)
Valve head diameter:	INTAKE	–
Valve head diameter:	EXHAUST	–
Valve length:	INTAKE	101.5 mm (3.99 in)
Valve length:	EXHAUST	101.5 mm (3.99 in)
Valve stem diameter:	INTAKE	6.960-6.975 mm (0.274-0.2746 in)
Valve stem diameter:	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)
Valve spring free length:	EXHAUST	37.0-37.5 mm (1.4567-1.4764 in)
Camshaft lobe height:	INTAKE	28.80 mm (1.1339 in)
Camshaft lobe height:	EXHAUST	29.00 mm (1.1417 in)
Camshaft journal diameter:		35.934-35.950 mm (1.4147-1.4154 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	D1105-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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