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| Home / Engines / Kubota Engines / Kubota D1503 |
Kubota D1503 Maintenance
| Engine Model: Kubota D1503 |
| Engine Type: 4-cycle vertical 3-cylinder water-cooled diesel engine |
| Total Displacement: 91.4 cu.in (1.5 L) |
| Rated Engine Power: 30.5 Hp (22.8 kW) at 3000 rpm |
| Fuel System: Indirect fuel injection |
| Service Data |
Cylinder bore inside diameter, mm (in) ............... 83.000-83.022 (3.26772-3.26858)
Cylinder compression, kPa (psi) ............... 3530-4020 (512-583)
Cylinder head (max out of flatness), mm (in) ............... 0.05 (0.002)
Intake valve clearance (Cold), mm (in) ............... 0.18-0.22 (0.0071-0.0086)
Exhaust valve clearance (Cold), mm (in) ............... 0.18-0.22 (0.0071-0.0086)
Engine oil pressure (Idle Speed), kPa (psi) ............... 49 (7)
Engine oil pressure (Rated Speed), kPa (psi) ............... 294-441 (43-64)
Fan belt tension, N (kgf) ............... 98 (10)
Fan belt deflection, mm (in) ............... 10-12 (0.39-0.47)
| Engine Oil |
Engine oil type ............... SAE 10W-30, 10W-40
Oil classification (API service) ............... CD, CF or CE
Engine oil capacity (3.5" oil pan), L (qts) ............... 5.6 (5.9)
Engine oil capacity (4.9" oil pan), L (qts) ............... 7.0 (7.4)
| Engine Filters |
Oil filter part number ............... HH1C0-32430
Fuel filter part number ............... 15221-43170
Air filter part number ............... TC020-16320/T0270-93220
| Service Intervals |
Service Air Filter ............... Every 100 hours
Check Battery ............... Every 100 hours
Check Belt Tension ............... Every 100 hours
Change Engine Oil ............... Every 200 hours
Replace Oil Filter ............... Every 200 hours
Replace Fuel Filter ............... Every 400 hours
Clean Radiator Fins ............... Every 400 hours
Check Valve Clearance ............... Every 800 hours
Replace Air Filter ............... Every 1000 hours
Check Injection Nozzles ............... Every 2000 hours
Change Engine Coolant ............... Every 2000 hours
| Tightening Torque Specs |
Cylinder head cover screw (M6x1.0), Nm (lb-ft) ............... 6.9-11.3 (5.1-8.32)
Cylinder head cover cap nut (M8x1.25), Nm (lb-ft) ............... 6.9-8.8 (5.1-6.5)
Cylinder head screw (M11x1.25), Nm (lb-ft) ............... 93.2-98.1 (68.7-72.3)
Injection pipe retaining nut (M12x1.5), Nm (lb-ft) ............... 24.5-34.3 (18.1-25.3)
Nozzle holder assembly (M20x1.5), Nm (lb-ft) ............... 49.0-68.6 (36.2-50.6)
Overflow pipe assembly retaining nut (M12x1.5), Nm (lb-ft) ............... 19.6-24.5 (14.5-18.1)
Glow plug (M10x1.25), Nm (lb-ft) ............... 19.6-24.5 (14.5-18.1)
Rocker arm bracket nut (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Fan drive pulley mounting nut (M30x1.5), Nm (lb-ft) ............... 137.3-156.9 (101.3-115.7)
Fan drive pulley screw (M16x1.5), Nm (lb-ft) ............... 313.8-333.4 (231.5-245.9)
Camshaft set screw (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Connecting rod screw (M8x1.0), Nm (lb-ft) ............... 44.1-49.0 (32.5-36.2)
Flywheel screw (M12x1.25), Nm (lb-ft) ............... 98.1-107.9 (72.3-79.6)
Bearing case cover screw (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Main bearing case screw 2 (M10x1.25), Nm (lb-ft) ............... 68.6-73.5 (50.6-54.2)
Main bearing case screw 1 (M9x1.25), Nm (lb-ft) ............... 46.1-51.0 (34.0-37.6)
Alternator’s pulley nut, Nm (lb-ft) ............... 58.3-78.9 (43.0-58.2)
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