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Kubota D1402 Engine

General Technical Data

Kubota D1402 Engine Specifications

Engine Model .............. Kubota D1402
Engine Type .............. 4-Stroke, 3-cylinder water-cooled diesel
Number of Cylinders .............. 3
Total displacement, cc (cu.in) .............. 1395 (85.13)
Engine Bore, mm (in) .............. 85.0 (3.25)
Engine Stroke, mm (in) .............. 82.0 (3.23)
Rated Engine Power, hp (kW) .............. 32.0 (23.9)
Rated Engine Speed, rpm .............. 2800
Maximum Engine Speed, rpm .............. 3000
Idle Speed, rpm .............. 800
Compression Ratio .............. 21:1
Firing Order .............. 1-2-3
Oil Filter Type .............. Full Flow Paper

Fuel System

Fuel Injection Pump .............. Bosch K type mini
Injection Nozzle .............. DN12 SD12
Governor Type .............. Centrifugal ball mechanical
Injection Pressure, MPa (psi) .............. 13.73 (1991)
Injection Timing, rad (deg) .............. 0.436 (25) before T.D.C.

Electrical System

Electrical System Rating, Volts .............. 12
Starter Type .............. Electric
Starting Motor .............. 12V, 1.4 kW
Charging Dynamo .............. 12V, 300W
Battery Rating .............. 12V, 110AH

Dimensions

Length, mm (in) .............. 568 (22.4)
Width, mm (in) .............. 512 (20.2)
Height, mm (in) .............. 638.5 (25.2)
Dry Weight, kg (lbs) .............. 148.2 (327)

Kubota D1402 Maintenance Data

Cylinder Block and Valves

Cylinder Bore I.D. (Maximum), mm (in) .............. 85.15 (3.3524)
Cylinder Head (Maximum Out of Flatness), mm (in) .............. 0.05 (0.002)
Intake Valve Clearance, mm (in) .............. 0.18-0.22 (0.0071-0.0087)
Exhaust Valve Clearance, mm (in) .............. 0.18-0.22 (0.0071-0.0087)

Engine Oil and Filter

Engine Oil Type .............. SAE20, SAE30, 10W-30
Oil Classification .............. API Service CC, or CD
Oil Capacity, L (qts) .............. 6.2 (6.5)
Oil Filter Part Number .............. HH164-32430

Service Intervals

Service Air Cleaner Element .............. Every 100 hours
Change Engine Oil .............. Every 200 hours
Change Oil Filter Cartridge .............. Every 400 hours
Replace Fuel Filter Element .............. Every 400 hours
Replace Fan Belt .............. Every 400 hours
Check and Adjust Valve Clearance .............. Every 800 hours
Replace Air Cleaner Element .............. Yearly
Check Fuel Injection Pump .............. Every 800 hours

Kubota D1402 Service Specifications

Cylinder and Cylinder Head

Cylinder liner I.D (Standard) .............. 85.000-85.022 mm (3.3465-3.3473 in.)
Cylinder liner I.D (Wear limit) .............. 85.15 mm (3.3524 in.)
Cylinder head surface flatness .............. 0.05 mm (0.0020 in.)
Cylinder head gasket thickness .............. 1.30-1.60 mm (0.0512-0.0630 in.)
Top clearance .............. 0.7-0.9 mm (0.0276-0.0354 in.)

Valves

Valve seat width .............. 2.1 mm (0.0827 in.)
Valve seat angle .............. 0.785 rad (45 deg)
Valve stems O.D. (Intake, Exhaust) .............. 7.960-7.975 mm (0.3134-0.3140 in.)
Valve guides I.D. (Intake, Exhaust) .............. 8.015-8.030 mm (0.3156-0.3161 in.)
Clearance between valve stems and guides .............. 0.04-0.07 mm (0.0016-0.0028 in.)
Valve recessing .............. 1.1-1.3 mm (0.0433-0.0512 in.)
Valve clearance (Intake, Exhaust) .............. 0.18-0.22 mm (0.0071-0.0087 in.)
Valve spring free length .............. 41.7-42.2 mm (1.6417-1,6614 in.)

Rocker Arm

Rocker arm shafts O.D .............. 13.973-13.984 mm (0.5501-0.5506 in.)
Rocker arm bushings I.D .............. 14.002-14.043 mm (0.5513-0.5529 in.)
Rocker arm I.D. (Bushless type) .............. 14.002-14.043 mm (0.5513-0.5529 in.)
Clearance between rocker arm shafts and bushings .............. 0.018-0.070 mm (0.0007-0.0028 in.)
Adjustment of compression release .............. 0.750-1,125 mm (0.0295-0.0443 in.)

Camshaft

Camshaft bearing journal O.D .............. 39.934-39.950 mm (1.5722-1.5728 in.)
Camshaft bearing I.D .............. 40.000-40.025 mm (1.5748-1.5758 in.)
Clearance between camshaft bearing journals and bearings ...... 0.050-0.091 mm (0.0020-0.0036 in.)
Camshaft Alignment .............. 0.01 mm (0.00039 in.)
Cam Height .............. 33.36-33.31 mm (1.3134-1.3114 in.)
Gear backlash .............. 0.042-0.115 mm (0.0017-0.0045 in.)

Piston and Piston Rings

Piston pin bore I.D (Standard) .............. 23.000-23,013 mm (0,9055-0.9060 in.)
Piston pin bore I.D (Wear limit) .............. 23.053 mm (0.9076 in.)
Connecting rod small end bushings I.D .............. 23.025-23.040 mm (0.9065-0.9071 in.)
Clearance between piston pin and small end bushings .............. 0.014-0.038 mm (0.0006-0.0015 in.)
Connecting rod small end parent bore diameter .............. 26.000-26.013 mm (1.0236-1.0241 in.)
Connecting rod alignment .............. 0.05 mm (0.002 in.)
Top ring gap .............. 0.30-0.45 mm (0.012-0.017 in.)
Second ring gap .............. 0.30-0.45 mm (0.012-0.017 in.)
Oil ring gap .............. 0.25-0.45 mm (0.0099-0.017 in.)
Second Ring Groove Clearance .............. 0.0930-0.120 mm (0.00367-0.00472 in.)
Oil Ring Groove Clearance 0.020-0.052 mm (0.00079-0.0020 in.)

Crankshaft

Crankshaft alignment .............. 0.02 mm (0.0008 in.)
Crankshaft journals O.D .............. 51.921-51.940 mm (2.0441-2.0449 in.)
Crankshaft bearing I.D .............. 51.980-52.039 mm (2.0465-2.0488 in.)
Clearance between crankshaft journal and bearing .............. 0.040-0.118 mm (0.0016-0.0046 in.)
Crankshaft bearing undersizes .............. 0.2 mm (0.0079 in.)
Crankpin O.D .............. 43.959-43 975 mm (1.7307-1.7313 in.)
Crankpin bearings I.D .............. 44.010-44.052 mm (1.7327-1.7343 in.)
Clearance between crankpins and bearings .............. 0.035-0.093 mm (0.0014-0.0037 in.)
Crankpin beatings undersizes .............. 0.2 mm (0.0079 in.)
Ccrankshaft end play .............. 0.15-0.31 mm (0.0059-0.0122 in.)

Kubota D1402 Tightening Torque Specs

Rocker Cover .............. 8.1 Nm (6 ft-lbs)
Cylinder Head Bolts (Bolt and Washer) .............. 81 Nm (60 ft-lbs)
Cylinder Head Bolts (Flanged Bolt) .............. 94.5 Nm (70 ft-lbs)
Main Bearing Case Bolt (Bolt and Washer) .............. 33.8 Nm (25 ft-lbs)
Main Bearing Case Bolt (Flanged Bolt) .............. 40.5 Nm (30 ft-lbs)
Main Bearing Case Retainer Bolt (Bolt and Washer) .............. 67.5 Nm (50 ft-lbs)
Main Bearing Case Retainer Bolt (Flanged Bolt) .............. 73 Nm (54 ft-lbs)
Flywheel Bolt .............. 101.3 Nm (75 ft-lbs)
Connecting Rod Bolt (Non-flanged Bolt) .............. 40.5 Nm (30 ft-lbs)
Connecting Rod Bolt (Flanged Bolt) .............. 47.3 Nm (35 ft-lbs)
Rocker Arm Bracket .............. 27 Nm (20 ft-lbs)
Nozzle Holder Assembly .............. 47.3 Nm (35 ft-lbs)

KUBOTA TRACTORS TROUBLESHOOTING
L235	L2501	L2550	L275	L3110
L3301	L35	L3710	L3901	L4310
L5030	M4700	M5700	M6040	M6800
M8200	M8540	M9000	MX5100	MX5200