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| Home / Industrial Engines / Kubota Engines / Kubota D640 |
Kubota D640 Maintenance
| Engine Model: Kubota D640 |
| Engine Type: 4-cycle 3-cylinder liquid-cooled diesel engine |
| Total Displacement: 38.9 cu.in (0.64 L) |
| Rated Engine Power: 16.0 Hp (11.8 kW) at 3200 rpm |
| Aspiration Type: Naturally aspirated |
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| Service Data |
Cylinder bore inside diameter (maximum), in (mm) .............. 2.6044 (66.130)
Cylinder compression, psi (MPa) .............. 325-450 (2.24-3.10)
Cylinder head (max out of flatness), in (mm) .............. 0.002 (0.05)
Intake valve clearance (Cold), in (mm) .............. 0.007 (0.18)
Exhaust valve clearance (Cold), in (mm) .............. 0.007 (0.18)
| Engine Oil and Coolant |
Engine oil type .............. SAE30, SAE 10W-30
Oil classification (API service) .............. CC or CD
Engine oil capacity, qts (L) .............. 3.2 (3.0)
Coolant Capacity, qts (L) .............. 2.2 (2.1)
| Engine Filters |
Oil filter part number .............. HH152-32432
Fuel filter part number .............. 12581-43012 or 1T021-43560
Air filter part number .............. 15852-11082
| Service Intervals |
Change Engine Oil .............. Every 75 hours
Service Air Filter .............. Every 100 hours
Clean Fuel Filter .............. Every 100 hours
Check Battery .............. Every 100 hours
Check Belt Tension .............. Every 100 hours
Replace Engine Oil Filter .............. Every 150 hours
Replace Air Filter .............. Every 200 hours
Clean Radiator Fins .............. Every 200 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Replace Fuel Pre-Filter .............. Every 500 hours
Change Engine Coolant .............. Every 1000 hours
| Tightening Torque Specs |
Cylinder Head Bolt (M8x1.25), Nm (lb-ft) .............. 42 (32)
Main Bearing Case Bolt 2 (M7x1.0), Nm (lb-ft) .............. 26-30 (19-22)
Main Bearing Case Bolt 1 (M6x1.0), Nm (lb-ft) .............. 12.5-15.5 (9.5-11.5)
Connecting Rod Bolt (M7x1.0), Nm (lb-ft) .............. 26 (19)
Flywheel Bolt (M10x1.25), Nm (lb-ft) .............. 59 (44)
Rocker Arm Bracket Bolt (M6x1.0), Nm (lb-ft) .............. 11.5 (8.3)
Fan Drive Pulley Bolt (M12x1.5), Nm (lb-ft) .............. 117 (86)
Oil Pump Mounting Bolt (M8x1.25), Nm (lb-ft) .............. 20 (15)
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