The Kubota D1102 is a 1.1 L (1,115 cc, 68.0 cu·in) straight-three, water-cooled naturally aspirated vertical diesel engine manufactured by Kubota.
The Kubota D1102 engine has a spherical type сombustion сhamber, Bosch K-type mini fuel injection pump, and the DN12 SD12 injection nozzle. The compression ratio rating is 21.0:1. It has a 76.0 mm (2.99 in) cylinder bore and an 82.0 mm (3.23 in) piston stroke. The engine features a high-durability tunnel-type cylinder block with dry-type cylinder liners.
The D1102 diesel engine produced 25.8 PS (19.0 kW; 25.5 HP) at 2,800 rpm of gross horsepower.
The breakdown of the engine code is as follows:
- D – 3-cylinders
- 11 – Approximate displacement 1100 cc
General information
| Engine Specifications | |
| Engine code | D1102-B |
| Layout | Straight-3, vertical diesel engine |
| Fuel type | Diesel fuel No.2-D |
| Production | – |
| Displacement | 1.1 L, 1,115 cm3 (68.0 cu in) |
| Fuel injection pump | Bosch K-type mini fuel injection pump |
| Fuel nozzle | DN12 SD12 |
| Starting system | Electric starting with 12V (1.0 kW) starter |
| Starting support device | Glow plug |
| Governor | Centrifugal ball mechanical governor |
| Power adder | None |
| Max. Horsepower | 25.8 PS (19.0 kW; 25.5 HP) at 2,800 rpm |
| Torque output | – |
| Firing order | 1-2-3 |
| Dimensions (L x W x H): | 580 x 512 x 639 mm (22.8 x 20.2 x 25.2 in) |
| Weight | 146 kg (321.9 lbs) |
Cylinder block
| Cylinder block | ||
| Compression ratio: | 21.0:1 | |
| Cylinder bore: | 76.0 mm (2.99 in) | |
| Piston stroke: | 82.0 mm (3.23 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Cylinder inner diameter: | 76.000-76.019 mm (2.9921-2.9929 in) | |
| Piston skirt diameter | – | |
| Piston ring side clearance: | Second | 0.093-0.120 mm (0.0037-0.0047 in) |
| Oil | 0.020-0.052 mm (0.0008-0.0020 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 | 0.250-0.450 mm (0.0099-0.0177 in) | |
| Piston pin outer diameter | 23.002-23.011 mm (0.9056-0.9059 in) | |
| Crankshaft main journal diameter: | 51.921-51.940 mm (2.0441-2.0449 in) | |
| Crankpin diameter: | 43.959-43 975 mm (1.7307-1.7313 in) | |
Cylinder head
| Cylinder head | ||
| Valve Arrangement: | OHV, gear drive | |
| Valves: | 6 (2 valves per cylinder) | |
| Valve timing: | INTAKE | – |
| EXHAUST | – | |
| Valve seat width: | INTAKE | 2.10 mm (0.0827 in) |
| EXHAUST | 2.10 mm (0.0827 in) | |
| Valve stem diameter: | INTAKE | 7.960-7.975 mm (0.3134-0.3140 in) |
| EXHAUST | 7.960-7.975 mm (0.3134-0.3140 in) | |
| Valve spring free length: | INTAKE | 41.7-42.2 mm (1.6417-1.6614 in) |
| EXHAUST | 41.7-42.2 mm (1.6417-1.6614 in) | |
| Camshaft cam height: | INTAKE | 33.360-33.310 mm (1.3134-1.3114 in) |
| EXHAUST | 33.360-33.310 mm (1.3134-1.3114 in) | |
| Camshaft journal diameter: | 39.934-39.950 mm (1.5722-1.5728 in) | |
Tightening torque
| Tightening torque specs | |
| Rocker сover cup nuts: | 6.9-8.8 Nm (0.7-0.9 kgf-m, 5.1-6.5 lb-ft) |
| Rocker arm bracket nuts: | 23.5-27.5 Nm (2.4-2.8 kgf-m, 17.4-20.3 lb-ft) |
| Cylinder head: |
Bolt and washer (s/n before 25273): 78.5-83.4 Nm (8.0-8.5 kgf-m, 57.8-61.5 lb-ft) Flanged bolt (s/n after 25274): 93.2-98.1 Nm (9.5-10.0 kgf-m, 68.7-72.3 lb-ft) |
| Nozzle holder assembly: | 29.4-49.0 Nm (3.0-5.0 kgf-m, 21.7-36.2 lb-ft) |
| Connecting rod bolts: |
Non-flanged bolt: 36.3-41.2 Nm (3.7-4.2 kgf-m, 26.6-30.4 lb-ft) Flanged bolt: 44.1-49.0 Nm (4.5-5.0 kgf-m, 32.5-36.2 lb-ft) |
| Flywheel bolts: | 98.1-107.9 Nm (10.0-11.0 kgf-m, 72.3-79.6 lb-ft) |
| Main bearing case bolts 2: |
Bolt and washer (s/n before 38579): 63.7-68.6 Nm (6.0-7.0 kgf-m, 47.0-50.6 lb-ft) Flanged bolt (s/n after 38580): 68.6-73.5 Nm (7.0-7.5 kgf-m, 50.6-54.2 lb-ft) |
| Main bearing case bolts 1: |
Bolt and washer (s/n before 38538): 29.4-34.3 Nm (3.0-3.5 kgf-m, 21.7-25.3 lb-ft) Flanged bolt (s/n after 38539): 36.3-41.2 Nm (3.7-4.2 kgf-m, 26.8-30.4 lb-ft) |
Maintenance data
| Valve clearance | |
| Intake valve | 0.18-0.22 mm (0.0071-0.0087 in) |
| Exhaust valve | 0.18-0.22 mm (0.0071-0.0087 in) |
| Compression pressure | |
| Standard | 30.0-33.0 kgf/cm2 (2.9-3.2 MPa, 427-469 psi) |
| Oil system | |
| Recommended engine oil | CD or CE |
| SAE Viscosity Number | SAE 10W-30, 10W-40 |
| Engine oil capacity | 6.3 L (6.66 US. qt, 5.54 Imp. qt.) |
| Fuel system | |
| Injection timing: | 23-25° B.T.D.C. |
| Fuel injection pressure | 13.73-14.71 MPa (140-150 kgf/cm2, 1991-2133 psi) |
| Cooling system | |
| Thermostat’s valve opening temperature: | 80.5-83.5°C (157.1-162.5°F) |
| Temperature at which thermostat completely opens: | 95°C (203°F) |
| Electrical system | |
| Battery: | 12V, 80Ah or equivalent |
| Alternator current output: | 25A/14V at 4,000 rpm |
| Alternator brush Length (std/min): | 15.5 mm (0.6102 in)/10.3 mm (0.4055 in) |
| Glow plug resistance: | Approx 1.5 Ω |
| Starter motor (no-load test): |
Current: 45A or less Voltage: 11V Speed: 6,000 rpm or more |
| Commutator outer diameter (std/min): | 32.7 mm (1.2874 in) / 32.5 mm (1.2795 in) |
| Starter motor mica undercutting (std/min): | 0.5-0.8 mm (0.0197-0.0315 in) / 0.2 mm (0.0079 in) |
| Starter motor brush length (std/min): | 19.0 mm (0.7480 in) / 12.7 mm (0.5000 in) |
Author:
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