Kubota D1105

Kubota D1105The Kubota D1105 is a 1.1 L (1,123 cc, 68.5 cu-in) straight-three, water-cooled naturally aspirated diesel engine from Kubota 05-series.

The D1105 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 (D1105-B(E)) or 24.0:1 for the later versions (EPA Tier 2, 3, 4). The cylinder bore and the piston stroke are 78.0 mm (3.07 in) and 78.4 mm (3.09 in), respectively.

The Kubota D1105 diesel engine produced 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

General information

Engine Specifications
Engine code D1105
Layout Straight-3, vertical diesel engine
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)

*-may be differ depending on engine modification

Cylinder block

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

Cylinder head
Valve Arrangement: OHV, 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)

Maintenance data

Valve clearance
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.)
Fuel system
Fuel injection pump: Bosch MD type mini fuel injection pump
Injection nozzle: Mini Nozzle (DNOPD)
Firing order: 1-2-3
Injection pressure: 13.73 to 14.70 MPa; 140.0 to 150.0 kgf/cm2; 1992 to 2133 psi
Cooling system
Coolant capacity 3.1 L (3.3 US.qts, 2.7 Imp. qts)
Electrical system
Battery: 12V, 60Ah or equivalent
Starting motor: D1105-B(E), -E2B: 12 V, 1.0 kW
D1105-E3B, -E4B: 12 V, 1.2 kW
Starter mica undercut: 0.5-0.8 mm (0.0197-0.0315 in)
Starter brush length: 13.0 mm (0.5118 in)
Charging alternator: D1105-B(E), -E2B: 12 V, 360 W
D1105-E3B, -E4B: 12 V, 480 W
Alternator (no-load voltage): AC 13,5V at 5,000 rpm
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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6 Comments

  1. hello ,
    We got a Manitou 180 ATJ equipped with KUBOTA DIESEL ENGINE D1105
    Is it possible to get exhaust specifications fit on engine ? Does this fulfill sparks arrestor requirements and working conditions on refinery plant and gas and production environments. Thanks

    Reply

  5. hello can anybody help with the part number for the starter motor of KUBATA ENGINE MODEL D1105-BG-ET01

    Reply

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