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Kubota Z482 Engine
General Technical Data
Kubota Z482 Engine Specifications
Engine Model .......... Kubota Z482
Engine Type .......... Vertical, water-cooled, 4-stroke diesel
Number of cylinders .......... 2
Bore, mm (in.) .......... 67.0 (2.64)
Stroke, mm (in.) .......... 68.0 (2.68)
Total displacement, cm3 (cu. in.) .......... 479 (29.4)
Gross power, kw (hp) .......... 9.9 (13.3)
Net power, kw (hp) .......... 9.3 (12.5)
Maximum speed, rpm .......... 3800
Idling speed, rpm .......... 900-1000
Combustion Chamber .......... Spherical type (E-TVCS)
Direction of rotation .......... Counter-clockwise
Compression ratio .......... 23.5:1
Firing order .......... 1-2
Fuel System
Fuel injection pump .......... Bosch MD type mini pump
Injection nozzle .......... Bosch "Throttle" type
Injection timing, deg (rad) .......... 21 (0.37) before T.D.C.
Injection pressure, MPa (psi) .......... 13.73 (1991)
Governor .......... All speed mechanical governor
Lubricating System
Lubricating system .......... Forced lubrication by trochoid pump
Oil pressure indicating .......... Electrical type switch
Oil filter .......... Full flow paper filter (cartridge type)
Electrical System
Starting system .......... Electric starting with starter
Starting Motor .......... 12V, 0.8 kW
Starting support device .......... By glow plug in combustion chamber
Battery .......... 12V, 28 AH
Charging Alternator .......... 12V, 150W
Dimensions
Length, mm (in.) .......... 351 (13.8)
Width, mm (in.) .......... 389 (15.3)
Height, mm (in.) .......... 520 (20.5)
Dry weight, kg (lbs.) .......... 53.1 (117)
Kubota Z482 Maintenance Data
Fuel type .......... Diesel fuel No. 2-D
Engine oil type .......... SAE 10W-30/15W-40
Engine oil capacity, L (qts) .......... 2.1 (2.2)
Coolant capacity, L (qts) .......... 2.8 (3.0)
Oil filter change interval .......... Every 200 hours
Oil change interval .......... Every 200 hours
Fuel filter change interval .......... Every 400 hours
Kubota Z482 Service Specifications
Cylinder Head
Valve Clearance (Cold) .......... 0.145-0.185 mm (0.00571-0.00728 in.)
Compression Pressure .......... 2.85-3.23 MPa (413-469 psi)
Top Clearance .......... 0.50-0.70 mm (0.020-0.027 in.)
Valve Face (Intake and Exhaust), Angle .......... 0.79 rad (45°)
Valve Seat (Intake and Exhaust), Angle .......... 0.79 rad (45°)
Valve Seat (Intake and Exhaust), Width .......... 2.12 mm (0.0835 in.)
Intake Valve Timing, Open .......... 0.35 rad (20°) before T.D.C
Intake Valve Timing, Close .......... 0.79 rad (45°) after B.D.C
Exhaust Valve Timing, Open .......... 0.87 rad (50°) before B.D.C
Exhaust Valve Timing, Close .......... 0.26 rad (15°) after T.D.C
Tappet to Tappet Guide, Oil Clearance .......... 0.016-0.052 mm
(0.00063-0.0020 in.)
Tappet O.D. .......... 17.966-17.984 mm (0.70733-0.70803 in.)
Tappet Guide I.D. .......... 18.000-18.018 mm (0.70867-0.70937 in.)
Cylinder Block
Cylinder Liner I.D. .......... 67.000-67.019 mm (2.6378-2.6385 in.)
Cylinder Liner (Oversize 0.25 mm) I.D. .......... 67.250-67.269 mm
(2.6477-2.6483 in.)
Camshaft Side Clearance .......... 0.15-0.31 mm 0.0059-0.012 in.)
Piston Ring Gap, Top Ring .......... 0.15-0.30 mm (0.0059-0.011 in.)
Piston Ring Gap, Second Ring .......... 0.30-0.45 mm (0.012-0.017 in.)
Piston Ring Gap, Oil Ring .......... 0.15-0.30 mm (0.0059-0.011 in.)
Connecting Rod Alignment .......... 0.05 mm (0.002 in.)
Crankshaft Side Clearance 0.15-0.31 mm (0.0059-0.012 in.)
Crankshaft Alignment .......... 0.02 mm (0.0008 in.)
Crankshaft
Crankshaft Journal to Crankshaft Bearing 1, Oil Clearance ..........
0.0340-0.106 mm (0.00134-0.00417 in.)
Crankshaft Journal O.D. .......... 39.934-39.950 mm (1.5722-1.5728 in.)
Crankshaft Bearing 1 I.D. .......... 39.984-40.040 mm (1.5742-1.5763
in.)
Crankshaft Journal to Crankshaft Bearing 2 (Flywheel Side), Clearance
......... 0.028-0.059 mm (0.001-0.0023 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 Crankshaft Bearing 3 (Intermediate), Clearance
......... 0.028-0.059 mm (0.0011-0.0023 in)
Crankshaft Journal O.D. .......... 39.934-39.950 mm (1.5722-1.5728 in.)
Crankshaft Bearing 3 I.D. .......... 39.978-39.993 mm (1.5740-1.5745
in.)
Lubricating System
Engine Oil Pressure At Idle Speed .......... More than 49 kPa (7.1 psi)
Engine Oil Pressure At Rated Speed .......... 197-441 kPa (28.5-64.0
psi)
Inner Rotor to Outer Rotor, Clearance .......... 0.030-0.14 mm
(0.0012-0.0055 in.)
Outer Rotor to Pump Body, Clearance .......... 0.070-0.15 mm
(0.0028-0.0059 in.)
Inner Rotor to Cover, Clearance .......... 0.0750-0.135 mm
(0.00296-0.00531 in.)
Tightening Torque Specs
Cylinder head cover screw (M6 x 1), Nm (lb.-ft.) .......... 9.81-11.2
(7.24-8.31)
Cylinder head screw (M8 x 1.25), Nm (lb.-ft.) .......... 38-42 (28-31)
Flywheel screw (M10 x 1.25), Nm (lb.-ft.) .......... 54-58 (40-43)
Injection pipe retaining nut (M12 x 1.5), Nm (lb.-ft.) .......... 25-34
(18-25)
Overflow pipe retaining nut (M12 x 1.5), Nm (lb.-ft.) .......... 20-24
(15-18)
Nozzle holder assembly (M20 x 1.5), Nm (lb.-ft.) .......... 49-68
(37-50)
Glow plug (M8 x 1), Nm (lb.-ft.) .......... 7.9-14 (5.8-10)
Rocker arm bracket nut (M6 x 1), Nm (lb.-ft.) .......... 9.81-11.2
(7.24-8.31)
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KUBOTA TRACTORS SPECIFICATIONS |
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KUBOTA ENGINES DATA AND SERVICE SPECS |
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KUBOTA FRONT END LOADERS |
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KUBOTA TRACTORS TROUBLESHOOTING | ||||
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