Specifications, Service and Repair of Farm and Lawn Tractors

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John Deere X120 Specs

John Deere X120 Engine Specifications

Engine Model - Briggs and Stratton 31
Displacement - 502 cc (30.6 cu in.)
Bore - 90.60 mm (3.56 in.)
Stroke - 77.78 mm (3.06 in.)
Ignition Module (Armature) Air Gap - 0.253-0.356 mm (0.010-0.014 in.)
Intake Valve Clearance - 0.076-0.127 mm (0.003-0.005 in.)
Exhaust Valve Clearance - 0.13-0.18 mm (0.005-0.007 in.)
Spark Plug-Gap - 0.76 mm (0.030 in.)
Spark Plug-Torque - 20 Nm (15 lb-ft)
Start Type - Electric
Application - Riding mower, lawn tractor, trail mower
Engine Type - Intek
Shaft Output - Vertical
Crankshaft - 1 x 3 5/32
Shaft Diameter (in.) - 1
Shaft Length (in.) - 3 5/32
Shaft Keyway (in.) - 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) - 7/16-20
Shaft Rotation (From PTO Shaft Side) - CCW
Bearing Type - Plain
Cylinders (qty.) - 1
Cylinder Bore - Cast iron
Compression Ratio - 8.5:1
Cooling System - Air cooled
Air Cleaner Type - Dual element
Fuel Tank - Not included
Fuel Type - Gasoline
Fuel Filter - Yes
Crankcase Capacity, with Oil Filter - 1.4 L (1.5 qt)
Fuel Tank Capacity - 15.1 L (3.9 gal)
Fuel Types - 87 Octane Unleaded Fuel
Oil Capacity (qt.) - 1 1/2
Lubrication System - Splash
Ignition System - Electronic
Governor System - Mechanical
Carburetor - Float
Throttle Control - Remote
Choke Control - Manual
Fast Idle Engine Speed - 3250
Rotation Speed of Cutting Device with 42C Mower - 2909 r/min at 3350 r/min engine speed
Max. RPM - 3,300
Charging System Amps - 9
Muffler Included - Yes
Auto Compression Release - Yes
Bolt Circle (in.) - 10
Dimensions L x W x H (in.) - 19 x 16 x 13
Sound without Mower - 83.6 dB(A) at 3250 r/min engine speed
Sound with 42C Mower - 86.0 dB(A) at 3250 r/min engine speed
Vibration with 42C Mower - Below 2.5 m/s2

JD X120 Electrical System

Charging System - Regulated Circuit
Charging System Capacity - 9 Amp
Battery Voltage - 12 Volts
Battery Type - BCI Group U1

John Deere X120 Transmission

Transmission - Hydrostatic
Transaxle Model - Tuff Torq T40
Travel Speed (Forward) - 0-8.9 km/h (0-5.5 mph)
Travel Speed (Reverse) - 0-5.2 km/h (0-3.2 mph)

JD X120 Mechanical

Transmission - Hydrostatic
Front Power Take-Off - Independent
Clutch Type - Electric
Steering - Manual Steering
Cab - Open operator station (OOS)

Tire Sizes

Front Tires - 15 x 6.00 - 6
Rear Tires - 20 x 8.0 - 8
Tire Pressure (Front) - 97 kPa (14 psi)
Tire Pressure (Rear) - 69 kPa (10 psi)

John Deere X120 Mower

Model - 42C Mower
Mower Deck - 107 cm (42 in.)
Blades - Rotary 2
Blade Nut Torque (w/ M12 Nut) - 75 Nm (55 lb-ft)
Blade Nut Torque (w/ 5/8 in. Nut) - 88 Nm (65 lb-ft)
Cutting Height (Approximately) - 25-102 mm (1-4 in.)
Cutting Width - 1067 mm (42 in.)

Dimensions

Height - 1130 mm (44.5 in.)
Length (Overall) - 1750 mm (68.75 in.)
Width (Mower Deck Chute Down) - 1310 mm (51.75 in.)
Weight - 204 kg (450 lb)

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