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John Deere 320 Lawn Tractor - Engine Specs

John Deere 320 Engine Specifications

Engine Model ............ Kawasaki FD590V
Engine Type ............ 4-Stroke, vertical shaft, OVH liquid cooled gasoline
Number of Cylinders ............ 2
Cylinder Layout ............ 90 deg, V-Twin
Displacement, L (cu in) ............ 0.617 (37.7)
Engine Bore, mm (in) ............ 74.0 (2.91)
Engine Stroke, mm (in) ............ 68.0 (2.68)
Maximum Horse Power, hp (kW) ............ 18.0 (13.4)
Rated Engine Speed, rpm ............ 3600
Maximum Torque, Nm (ft-lbs) ............ 41.5 (30.6)
Torque Speed, rpm ............ 2600
Fast Idle Speed, rpm ............ 3500
Slow Idle Speed, rpm ............ 1550
Compression Ratio ............ 8.7:1
Fuel System ............ Carburetor
Fuel ............ Unleaded gasoline
Carburetor ............ Float type with fixed main jet
Fuel Pump ............ Diaphragm type mechanical pump
Governor ............ Mechanical Type
Air Cleaner ............ Dual element
Direction of Rotation ............ Counter-clockwise facing the PTO shaft
Lubrication System ............ Full pressure
Cooling System ............ Pressurized forced circulation type
Oil Filter ............ Spin-on type
Muffler ............ Low tone type
Ignition ............ Battery, full transistor, fixed timing type
Spark Plug ............ NGK BPR4ES
Starter ............ Electric, solenoid shift type
Charging Coil ............ 12V-17A with Regulator

John Deere 320 Engine Maintenance Data

Carburetor Adjustment

Carburetor Model ............ Mikuni BV24-18
Main Bore Diameter, mm (in) ............ 24.0 (0.95)
Venturi Diameter, mm (in) ............ 18.0 (0.71)
Main Jet ............ #110
Pilot Jet ............ #43.8
Main Air Jet ............ 1.7
Pilot Air Jet ............ 1.0
Pilot Screw Opening ............ 1-3/8 turns out
Low idle speed, rpm ............ 1550
Fast idle speed, rpm ............ 3400

Fuel Pump Specifications

Type ............ Mechanical Diaphragm Type
Delivery (MIN) ............ 800 ml (0.8 qt)/at 1550 rpm
Shut-off delivery pressure ............ 2.45 kPa (0.36 psi)

Valve Adjustment

Intake Valve Clearance ............ 0.25 mm (0.010 in.)
Exhaust Valve Clearance ............ 0.25 mm (0.010 in.)
Valve Spring Free Length ............ 29.70 mm (1.170 in.)
Minimum Valve Stem O.D (Intake) ............ 5.94 mm (0.234 in.)
Minimum Valve Stem O.D (Exhaust) ............ 5.92 mm (0.233 in.)

Engine Oil and Filter

Engine Oil Type ............ SAE 10W-30/10W-40, SAE 5W-20/5W-30
Oil Classification ............ SC, SD, SE, SF, SG or SH
Oil Capacity, L (qts) ............ 1.7 (1.8)
Oil Filter Part Number ............ AM103027
Air Filter Part Number ............ MIU10778

Ignition System

Plug Type ............ NGK BPR4ES
Plug Gap, mm (in) ............ 0.6-0.7 (0.0237-0.0277)
Ignition Coil Air Gap, mm (in) ............ 0.3-1.2 (0.0119-0.0474)
Spark plug torque ............ 17 Nm (12.5 ft-lb)

John Deere 320 Engine Repair Specifications

Cylinder Block

Cylinder compression ............ 12.0 kg/cm2 (170 psi)
Cylinder Bore Standard I.D ............ 73.98-74.00 mm (2.915-2.916 in.)
Cylinder Bore Maximum I.D ............ 74.07 mm (2.918 in.)
Rebore Cylinder 0.50 mm Oversize Diameter ............ 74.46-74.48 mm (2.934-2.935 in.)
Crankshaft Side Journal O.D ............ 33.91 mm (1.335 in.)
Minimum Shaft O.D ............ 11.95 mm (0.470 in.)
Maximum Bearing I.D ............ 12.07 mm (0.475 in.)

Cylinder Head and Valves

Maximum Cylinder Head Flatness ............ 0.06 mm (0.002 in.)
Minimum Valve Spring Free Length ............ 29.70 mm (1.170 in.)
Minimum Valve Stem O.D (Intake) ............ 5.94 mm (0.234 in.)
Minimum Valve Stem O.D (Exhaust) ............ 5.92 mm (0.233 in.)
Maximum Valve Guide I.D ............ 6.05 mm (0.238 in.)
Maximum Valve Stem Bend ............ 0.03 mm (0.001 in.)
Standard Valve Seating Surface ............ 0.80 mm (0.031 in.)
Valve Seating Width Tolerance ............ 0.50-1.10 mm (0.020-0.034 in.)
Valve Seat and Face Angle 45 deg
Minimum Valve Margin ............ 0.60 mm (0.024 in.)
Valve Narrowing Angle 30 deg

Piston and Piston Rings

Top and Second Ring Groove Clearance ............ 0.10 mm (0.004 in.)
Ring End Gap ............ 1.0 mm (0.040 in.)
Minimum Pin O.D ............ 16.98 mm (0.668 in.)
Maximum Pin Bore I.D ............ 17.04 mm (0.671 in.)
Piston O.D ............ 73.935-73.950 mm (2.9108-2.9114 in.)
Piston to Cylinder Bore Clearance ............ 0.030-0.170 mm (0.00118-0.0067 in.)

John Deere 320 Engine Tightening Torque Specs

Cylinder Head, Nm (ft-lbs) ............ 21 (15.5)
Connecting Rod, Nm (ft-lbs) ............ 12 (9.1)
Flywheel, Nm (ft-lbs) ............ 120 (88.5)
Crankcase Cover, Nm (ft-lbs) ............ 21 (15.5)
Intake Manifold, Nm (ft-lbs) ............ 8 (6.1)
Oil Drain Plug, Nm (ft-lbs) ............ 25 (18.6)
Spark Plug, Nm (ft-lbs) ............ 17 (12.5)
Valve Clearance Lock Nut, Nm (ft-lbs) ............ 8.8 (6.5)

JOHN DEERE TRACTORS ATTACHMENTS
420	430	455	790	990
X300	X320	X330	X350	X475
X485	X500	X540	X570	X590
X700	X720	X738	X758	1023E
2025R	2210	2520	3025E	3032E
3038E	3038R	3039R	3046R	3203
3320	3520	4052R	4066R	4100
4105	4115	4200	4310	4320
4400	4410	4520	4600	4720

JD TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R