Kubota D905 Specifications
| Engine Model: Kubota D905 |
| Engine Type: 4-cycle vertical 3-cylinder liquid-cooled diesel |
| Total Displacement: 54.8 cu.in (0.89 L) |
| Rated Engine Power: 23.5 Hp (17.5 kW) at 3800 rpm |
| Aspiration Type: Naturally aspirated |
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Engine Model ............... Kubota D905
Engine Type ............... 4-cycle vertical liquid-cooled diesel
Number of cylinders ............... 3
Cylinder Bore, mm (in) ............... 72.0 (2.83)
Piston Stroke, mm (in) ............... 73.6 (2.90)
Total displacement, L (cu.in) ............... 0.89 (54.86)
Gross power, kw (hp) ............... 19.4 (26.0)
Net power, kw (hp) ............... 17.5 (23.5)
Maximum speed, rpm ............... 3800
Idling speed, rpm ............... 600
Maximum torque, Nm (lb-ft) ............... 52.8 (38.9)
Torque speed, rpm ............... 2400
Aspiration Type ............... Naturally aspirated
Combustion chamber ............... Spherical type
Direction of rotation ............... Counter-clockwise
Compression ratio ............... 22:1
Firing order ............... 1-2-3
Lubricating system ............... Forced lubrication by pump
Oil pressure indicating ............... Electrical type switch
Oil filter type ............... Full flow cartridge, paper element
Engine oil capacity, L (qts) ............... 4.0 (4.23)
Coolant capacity, L (qts) ............... 3.4 (3.6)
Starting system ............... Electric starting with starter
Electrical system rating, Volts ............... 12
Fuel injection pump ............... Bosch MD type mini pump
Injection nozzle ............... Mini nozzle (DNOPD)
Injection timing (Without timer), deg (rad) ............... 21-23 (0.37-0.40) before T.D.C.
Injection timing (With timer), deg (rad) ............... 9-11 (0.16-0.19) before T.D.C.
Governor type ............... Centrifugal, mechanical
Overall length, mm (in) ............... 497.8 (19.60)
Overall width, mm (in) ............... 396 (15.59)
Overall height, mm (in) ............... 608.7 (23.96)
Dry weight, kg (lbs) ............... 93.0 (205.0)
Cylinder Liner I.D ............... 72.000-72.019 mm (2.8346-2.8354 in)
Oversized Cylinder Liner I.D ............... +0.5 mm (+0.0197 in)
Crankshaft to Bearing 1 Clearance ............... 0.034-0.114 mm (0.0013-0.0045 in)
Crankshaft 1 O.D ............... 47.934-47.950 mm (1.8872-1.8878 in)
Crankshaft Bearing 1 I.D ............... 47.984-48.084 mm (1.8891-1.8917 in)
Crankshaft to Bearing 2 Clearance ............... 0.034-0.095 mm (0.0013-0.0037 in)
Crankshaft 2 O.D ............... 47.934-47.950 mm (1.8872-1.8878 in)
Crankshaft Bearing 2 I.D ............... 47.984-48.029 mm (1.8891-1.8909 in)
Crankshaft to Bearing 3 Clearance ............... 0.034-0.098 mm (0.0013-0.0039 in)
Crankshaft 3 O.D ............... 51.921-51.940 mm (2.0441-2.0449 in)
Crank Bearing 3 I.D ............... 51.974-52.019 mm (2.0462-2.0480 in)
Crank Pin O.D ............... 39.959-39.975 mm (1.5732-1.5738 in)
Crank Pin Bearing I.D ............... 40.004-40.050 mm (1.5750-1.5768 in)
Crank Pin to Bearing Clearance ............... 0.029-0.091 mm (0.0011-0.0036 in)
Connecting Rod Alignment ............... 0.05 mm (0.0020 in)
Connecting Rod Small End Bushing I.D ............... 22.025-22.040 mm (0.8671-0.8677 in)
Cylinder Head Surface Flatness ............... 0.05 mm (0.0019 in)
Top Clearance ............... 0.55-0.75 mm (0.0217-0.0295 in)
Valve Clearance (Cold) ............... 0.145-0.185 mm (0.0057-0.0072 in)
Valve Seat Width (Intake) ............... 2.12 mm (0.0835 in)
Valve Seat Width (Exhaust) ............... 2.12 mm (0.0835 in)
Valve Seat Angle (Intake) ............... 1.047 rad. (60 deg)
Valve Seat Angle (Exhaust) ............... 0.785 rad. (45 deg)
Valve Face Angle (Intake) ............... 1.047 rad. (60 deg)
Valve Face Angle (Exhaust) ............... 0.785 rad. (45 deg)
Valve Recessing ............... 0.05-0.25 mm (0.0020-0.0060 in)
Valve Stem O.D ............... 6.960-6.975 mm (0.2741-0.2746 in)
Valve Guide I.D ............... 7.010-7.025 mm (0.2760-0.2765 in)
Valve Stem to Guide Clearance ............... 0.035-0.065 mm (0.0014-0.0025 in)
Valve Opening (Intake) ............... 0.24 rad (14 deg) before T.D.C.
Valve Closing (Intake) ............... 0.52 rad (30 deg) after B.D.C.
Valve Opening (Exhaust) ............... 0.96 rad (55 deg) before B.D.C.
Valve Closing (Exhaust) ............... 0.24 rad (14 deg) after T.D.C.
Valve Spring Free Length ............... 37.0-37.5 mm (1.457-1.476 in)
Rocker Arm Shaft to Rocker Arm Clearance ............... 0.016-0.045 mm (0.0006-0.0018 in)
Rocker Arm Shaft O.D ............... 11.973-11.984 mm (0.4714-0.4718 in)
Rocker Arm I.D ............... 12.000-12.018 mm (0.4724-0.4731 in)
Camshaft Journal O.D ............... 35.934-35.050 mm (1.4147-1.3799 mm)
Camshaft Bearing I.D ............... 36.000-36.025 mm (1.4173-1.4183 in)
Camshaft Side Clearance ............... 0.07-0.22 mm (0.0028-0.0087 in)
Camshaft Alignment ............... 0.01 mm (0.0004 in)
Cam Height (Intake) ............... 28.80 mm (1.1339 in)
Cam Height (Exhaust) ............... 29.00 mm (1.1417 in)
Piston Pin O.D ............... 22.002-22.011 mm (0.8662-0.8666 in)
Piston Pin Bore ............... 22.000-22.013 mm (0.8661-0.8687 in)
Piston Pin to Small end Bushing Clearance ............... 0.014-0.038 mm (0.0006-0.0015 in)
Second Ring Groove Clearance ............... 0.085-0.112 mm (0.0033-0.0044 in)
Oil Ring Groove Clearance ............... 0.020-0.055 mm (0.0008-0.0021 in)
Top Ring End Gap ............... 0.25-0.40 mm (0.0098-0.0157 in)
Second Ring End Gap ............... 0.25-0.40 mm (0.0098-0.0157 in)
Oil Ring End Gap ............... 0.25-0.40 mm (0.0098-0.0157 in)
Cylinder bore inside diameter, mm (in) ............... 72.000-72.019 (2.8346-2.8354)
Cylinder compression, kPa (psi) ............... 2240-3100 (325-450)
Cylinder head (max out of flatness), mm (in) ............... 0.05 (0.0019)
Injection pressure, kPa (psi) ............... 13730 (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 pressure (Idle Speed), kPa (psi) ............... 49 (7)
Engine oil pressure (Rated Speed), kPa (psi) ............... 196-441 (28-64)
Engine oil type ............... SAE30, SAE 10W, SAE 10W-30
Oil classification (API service) ............... CD, CE, or higher
Engine oil capacity (4" oil pan), L (qts) ............... 4.0 (4.23)
Engine oil capacity (5" oil pan), L (qts) ............... 5.1 (5.4)
Oil filter part number ............... HH150-32094
Fuel filter part number ............... 1T021-43560
Air filter part number ............... 6C040-94240, 6C040-94250
Check Fuel Pipes ............... Every 50 hours
Service Air Filter ............... Every 100 hours
Clean Fuel Filter ............... Every 100 hours
Check Battery ............... Every 100 hours
Check Belt Tension ............... Every 100 hours
Change Engine Oil (4" Oil Pan) ............... Every 150 hours
Replace Oil Filter (4" Oil Pan) ............... Every 150 hours
Change Engine Oil (5" Oil Pan) ............... Every 200 hours
Replace Oil Filter (5" Oil Pan) ............... Every 200 hours
Replace Fuel Filter ............... Every 400 hours
Clean Radiator Fins ............... Every 500 hours
Check Valve Clearance ............... Every 800 hours
Replace Air Filter ............... Every 1000 hours
Check Injection Nozzles ............... Every 1500 hours
Change Engine Coolant ............... Every 1500 hours
Cylinder head cover cap nuts (M7x1.0), Nm (lb-ft) ............... 6.9-8.8 (5.1-6.5)
Cylinder head screw (M10x1.25), Nm (lb-ft) ............... 63.7-68.6 (47.0-50.6)
Main bearing case screw 1 (M8x1.25), Nm (lb-ft) ............... 29.4-34.3 (21.7-25.3)
Main bearing case screw 2 (M9x1.25), Nm (lb-ft) ............... 49.0-53.9 (36.2-39.8)
Flywheel screw (M10x1.25), Nm (lb-ft) ............... 53.9-58.8 (39.8-43.4)
Connecting rod screw (M8x1.0), Nm (lb-ft) ............... 41.2-46.1 (30.4-34.0)
Rocker arm bracket nuts (M7x1.0), Nm (lb-ft) ............... 21.6-26.5 (15.9-19.5)
Idle gear shaft screws (M6x1.0), Nm (lb-ft) ............... 9.8-11.3 (7.2-8.3)
Crankshaft end bolt (M14x1.5), Nm (lb-ft) ............... 235.4-245.2 (173.6-180.8)
Bearing case cover screws (M6x1.0), Nm (lb-ft) ............... 9.8-11.3 (7.2-8.3)
Glow plugs (M8x1.0 ), Nm (lb-ft) ............... 7.8-14.7 (5.8-10.8)
Nozzle holder assembly (M20x1.5), Nm (lb-ft) ............... 49.0-68.6 (36.2-50.6)
Oil switch taper screw (PT1/8), Nm (lb-ft) ............... 14.7-19.6 (10.8-14.5)
Injection pipe retaining nuts (M12x1.5), Nm (lb-ft) ............... 24.5-34.3 (18.1-25.3)
Overflow pipe assembly nuts (M12x1.5), Nm (lb-ft) ............... 19.6-24.5 (14.5-18.1)
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