Kubota Z602 Specifications
| Engine Model: Kubota Z602 |
| Engine Type: 4-cycle vertical 2-cylinder liquid-cooled diesel |
| Total Displacement: 36.6 cu.in (0.60 L) |
| Rated Engine Power: 15.5 Hp (11.6 kW) at 3800 rpm |
| Aspiration Type: Naturally aspirated |
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Engine Model .............. Kubota Z602
Engine Type .............. 4-stroke 2-cylinder liquid-cooled diesel
Number of cylinders .............. Two
Cylinder Bore, mm (in) .............. 72.0 (2.83)
Piston Stroke, mm (in) .............. 73.6 (2.90)
Total displacement, L (cu.in) .............. 0.60 (36.6)
Gross power, kw (hp) .............. 12.5 (16.8)
Net power, kw (hp) .............. 11.6 (15.5)
Maximum speed, rpm .............. 3800
Idling speed, rpm .............. 900-1000
Combustion Chamber .............. Spherical type (E-TVCS)
Direction of rotation .............. Counter-clockwise
Compression ratio .............. 24:1
Firing order .............. 1-2
Lubricating system .............. Forced lubrication by trochoid pump
Oil pressure indicating .............. Electrical type switch
Oil filter .............. Full flow paper filter (cartridge type)
Starting system .............. Electric starting with starter
Electrical system rating, Volts ............... 12
Fuel System .............. Fuel injection
Fuel injection pump .............. Bosch MD type mini pump
Injection nozzle .............. Bosch "Throttle" type
Governor type .............. All speed mechanical governor
Overall Length, mm (in) .............. 385.0 (15.2)
Overall Width, mm (in) .............. 421.0 (16.6)
Overall Height, mm (in) .............. 544.0 (21.4)
Dry weight, kg (lbs.) .............. 60.0 (132)
Cylinder Liner I.D .............. 72.000-72.019 mm (2.8347-2.8353 in)
Cylinder Liner (Oversize 0.25 mm) I.D .............. 72.250-72.269 mm (2.8445-2.8452 in)
Piston Pin Bore I.D .............. 20.000-20.013 mm (0.78741-0.78791 in)
Piston Pin to Small End Bushing, Oil Clearance .............. 0.014-0.038 mm (0.00056-0.0014 in)
Piston Pin O.D .............. 20.002-20.011 mm (0.78748-0.78783 in)
Crankshaft Journal to Bearing Clearance .............. 0.0340-0.106 mm (0.00134-0.00417 in)
Crankshaft Journal O.D .............. 43.934-43.950 mm (1.7297-1.7303 in)
Crankshaft Bearing 1 I.D .............. 43.984-44.040 mm (1.7317-1.7338 in)
Crankshaft Journal to Bearing Clearance (Flywheel) .............. 0.028-0.059 mm (0.0011-0.002 in)
Crankshaft Journal O.D .............. 43.934-43.950 mm (1.7297-1.7303 in)
Crankshaft Bearing 2 I.D .............. 43.978-43.993 mm (1.7315-1.7320 in)
Crankshaft Journal to Bearing Clearance (Center) .............. 0.028-0.059 mm (0.0011-0.002 in)
Crankshaft Journal O.D .............. 43.934-43.950 mm (1.7297-1.7303 in)
Crankshaft Bearing 3 I.D .............. 43.978-43.993 mm (1.7315-1.7320 in)
Valve Clearance (Cold) .............. 0.145-0.185 mm (0.00571-0.00728 in)
Compression Pressure .............. 3.53-4.02 MPa (512-583 psi)
Top Clearance .............. 0.50-0.70 mm (0.020-0.027 in)
Cylinder Head Surface, Flatness .............. 0.05 mm (0.002 in)
Valve Recessing (Intake and Exhaust) .............. 0.10-0.10 mm (0.0039-0.0039 in)
Valve Stem to Valve Guide, Clearance .............. 0.030-0.057 mm (0.0012-0.0022 in)
Valve Stem O.D .............. 5.968-5.980 mm (0.2350-0.2354 in)
Valve Guide I.D .............. 6.010-6.025 mm (0.2367-0.2372 in)
Rocker Arm Shaft to Rocker Arm Clearance .............. 0.016-0.045 mm (0.00063-0.0017 in)
Rocker Arm Shaft O.D .............. 10.473-10.484 mm (0.41233-0.41275 in)
Rocker Arm I.D .............. 10.500-10.518 mm (0.41339-0.41409 in)
Push Rod Alignment – 0.25 mm (0.0098 in)
Cam Height (Intake and Exhaust) .............. 26.88 mm (1.058 in)
Camshaft Journal to Cylinder Bore Clearance .............. 0.050-0.091 mm (0.0020-0.0035 in)
Cylinder bore inside diameter, mm (in) .............. 72.000-72.019 (2.8347-2.8353)
Cylinder compression, psi (MPa) .............. 413-469 (2.85-3.23)
Cylinder head (max out of flatness), mm (in) .............. 0.05 (0.002)
Engine Oil Pressure At Rated Speed .............. 197-441 kPa (28.5-64.0 psi)
Injection timing, deg (rad) .............. 20 (0.35) before T.D.C.
Injection pressure, MPa (psi) .............. 13.73 (1991)
Intake valve clearance (Cold), mm (in) .............. 0.145-0.185 (0.0057-0.0072)
Exhaust valve clearance (Cold), mm (in) .............. 0.145-0.185 (0.0057-0.0072)
Engine oil type .............. SAE 10W-30, 15W-40
Oil classification (API service) .............. CF, CF-4, or CG-4
Engine oil capacity, L (qts) .............. 2.0 (2.1)
Coolant capacity, L (qts) .............. 2.9 (3.1)
Oil filter part number .............. HH150-32430
Fuel filter part number .............. 12581-43012
Air filter part number .............. K1211-82320
Check Fuel Hoses and Clamps .............. Every 50 hours
Change Engine Oil .............. Every 100 hours
Clean Air Filter .............. Every 100 hours
Clean Fuel Filter .............. Every 100 hours
Check Battery .............. Every 100 hours
Check Drive Belt Tension .............. Every 100 hours
Replace Engine Oil Filter .............. Every 200 hours
Check Intake Air Line .............. Every 200 hours
Replace Fuel Filter .............. Every 400 hours
Clean Radiator Fins .............. Every 600 hours
Replace Drive Belt .............. Every 600 hours
Replace Air Filter .............. Every 600 hours
Check and Adjust Valve Clearance .............. Every 800 hours
Check Injection Nozzle .............. Every 1500 hours
Check Injection Timing .............. Every 1500 hours
Check Fuel Injection Pump .............. Every 1500 hours
Change Engine Coolant .............. Every 2000 hours
Cylinder head cover screw (M6x1), Nm (lb-ft) .............. 9.81-11.2 (7.24-8.31)
Cylinder head screw (M8x1.25), Nm (lb-ft) .............. 38-42 (28-31)
Flywheel screw (M10x1.25), Nm (lb-ft) .............. 54-58 (40-43)
Rocker arm bracket nut (M6x1), Nm (lb-ft) .............. 9.81-11.2 (7.24-8.31)
Fan drive pulley screw (M12x1.5), Nm (lb-ft) .............. 118-127 (86.8-94.0)
Idle gear shaft mounting screw (M6x1), Nm (lb-ft) .............. 9.81-11.2 (7.24-8.31)
Oil pump mounting screw (M8x1.25), Nm (lb-ft) .............. 17.7-21.5 (13.1-15.9)
Connecting rod screw (M7x0.75), Nm (lb-ft) .............. 27-30 (20-22)
Fan drive pulley screw (M12x1.5), Nm (lb-ft) .............. 117.7-127.5 (86.8-94)
Idle gear shaft mounting screw M6x1), Nm (lb-ft) .............. 9.8-11.3 (7.2-8.3)
Oil pump mounting screw M8x1.25), Nm (lb-ft) .............. 17.7-21.6 (13-15.9)
Connecting rod screw M7x0.75), Nm (lb-ft) .............. 26.5-30.4 (19.5-22.4)
Bearing case cover mounting screw M6x1), Nm (lb-ft) .............. 9.8-11.3 (7.2-8.3)
Alternator’s pulley nut, Nm (lb-ft) .............. 58.3-78.9 (43-58.2)
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