Kubota D1100

Kubota D1100The Kubota D1100 is a 1.1 L (1,115 cc, 68.0 cu·in) natural aspirated three-cylinders four-stroke liquid-cooled internal combustion vertical diesel engine, manufactured by Kubota for general-purpose applications.

A 76.0 mm (2.99 in) cylinder bore and 82.0 mm (3.23 in) piston stroke give the D1100 engine a total of 1,115 cc of displacement. The compression ratio rating is 21.0:1.

The D1100 engine produced 23.8 PS (17.5 kW; 23.5 HP) at 2,700 rpm of horsepower.

The Kubota D1100 features:

  • Spherical type combustion chamber
  • Centrifugal ball mechanical governor
  • Forced lubrication by pump
  • Liquid cooling system forced circulation with water pump
  • Electric starter (12V)
  • Charging alternator (12V)

General information

Engine Specifications
Engine modelD1100A
Engine type4-stroke, vertical, three-cylinders
Displacement1.1 L, 1,115 cm3, (68.0 cu·in)
Max. horsepower23.8 PS (17.5 kW; 23.5 HP) at 2,700 rpm
Max. torque
Cooling systemLiquid-cooled
Lubricating systemForced lubrication by pump
Combustion chamberSpherical type
Fuel injection pumpMini pump
Injection nozzle
Fuel usedDiesel fuel No.2-D
Starting systemElectric starter (12V)
Starting support deviceGlow plug
GovernorCentrifugal ball mechanical governor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Dimensions (L x W X H)498 x 447 x 590 mm (19.6 x 17.6 x 23.2 in)
Dry weight110 kg (242.5 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:21.0:1
Cylinder bore:76.0 mm (2.99 in)
Piston stroke:82.0 mm (3.23 in)
Cylinder internal diameter (standard):79.000-79.030 mm (3.1102-3.1114 in)
Number of piston rings (compression / oil):2/1
Piston pin diameter:23.100 mm (0.9094 in)
Side clearance (Second):0.065-0.090 mm (0.0026-0.0035 in)
Side clearance (Oil):0.020-0.060 mm (0.0008-0.0024 in)
Ring end gap (Top):0.300-0.450 mm (0.0118-0.0177 in)
Ring end gap (Second):0.300-0.450 mm (0.0118-0.0177 in)
Ring end gap (Oil):0.250-0.400 mm (0.0098-0.0157 in)
Number of main bearings:4
Crankshaft main journal diameter:51.990-52.010 mm (2.0468-2.0476 in)
Crankpin journal diameter:43.880-43.900 mm (1.7276-1.7283 in)
Cylinder head
Valves:2(6 valves in total)
Valve seat width (INTAKE):1.50 mm (0.060 in)
Valve seat width (EXHAUST):1.50 mm (0.060 in)
Value seat angle (INTAKE):45°
Value seat angle (EXHAUST):45°
Valve steam diameter (INTAKE):7.950-7.975 mm (0.3130-0.3140 in)
Valve steam diameter (EXHAUST):7.950-7.975 mm (0.3130-0.3140 in)
Valve spring free length (INTAKE):42.0 mm (1.6535 in)
Valve spring free length (EXHAUST):42.0 mm (1.6535 in)
Camshaft cam height (INTAKE):36.870 mm (1.4516 in)
Camshaft cam height (EXHAUST):36.870 mm (1.4516 in)
Camshaft journal diameter :39.935-39.950 mm (1.5722-1.5728 in)

Tightening torque

Tightening torque specs
Cylinder head cover screw:75.0-82.0 Nm (7.7-8.4 kgf·m; 55.4-60.5 lb·ft)
Connecting rod screw:37.0-41.0 Nm (3.8-4.2 kgf·m; 27.3-30.3 lb·ft)
Flywheel screw:54.0-58.0 Nm (5.5-5.9 kgf·m; 39.9-42.8 lb·ft)
Idle gear shaft screws:32.4-37.3 Nm (3.3-3.8 kgf·m; 23.9-27.5 lb·ft)
Bearing case cover mounting screw:49.0-68.6 Nm (5-7 kgf·m; 36.2-50.6 lb·ft)

Service Data

Maximum speed:3,000 rpm
Idle speed:800 rpm
Valve clearance
Intake valve clearance:0.18-0.22 mm (0.0071-0.0087 in)
Exhaust valve clearance:0.18-0.22 mm (0.0071-0.0087 in)
Oil system
Lubrication system:Forced lubrication by pump
Oil type:DS or DM
Oil capacity:5.3 L (5.6 US. qt, 4.66 Imp. qt.))
Oil filter:Full flow
Fuel system
Injection timing:25° B.T.D.C.
Fuel injection pressure13.73-14.71 MPa (140-150 kgf/cm2, 1991-2133 psi)
Cooling system
Type:Pressurized radiator forced circulation with water pump
Coolant capacity:6.9 liters (7.3 US.qts, 6.1 Imp. qts)
Electrical system
Battery:12V, 80Ah or equivalent
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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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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