Specifications, Service and Repair of Farm and Lawn Tractors

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John Deere L108 Specs

John Deere L108 Engine Specifications

Engine Model - Briggs Stratton 31P677
Engine Type - Air-cooled vertical shaft
Horsepower - 13.8 kW (18.5 hp)
Displacement - 501 cc (30.59 cu.in.)
Bore - 90.60 mm (3.56 in.)
Stroke - 77.78 mm (3.06 in.)
Fuel - Gasoline
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)
Cylinders - One
Oil Filter - Yes
Oil capacity - 2 qts (1.9 L)
Air Filter - Paper with Foam
Charging System - Regulated Circuit
Charging System Capacity - 9 Amp
Battery Voltage - 12 Volts
Battery Type - BCI Group U1

John Deere L108 Drivetrain

Transmission Type - Belt-driven hydrostatic
Transaxle Manufacturer - Tuff Torq HD K46
Gears - Infinite forward and reverse
Transmission Oil change - Sealed unit, service not recommended
Forward Travel Speed - 0-8.9 km/h (0-5.5 mph)
Reverse Travel Speed -- 0-5.2 km/h (0-3.2 mph)
Chassis - 4x2 2WD
Steering - Manual Steering

JD L108 Power Take-off

Mid PTO - Independent
Clutch - Mechanical

Tires

Size (Front) - 15x6.00-6
Size (Rear) - 20x8.0-8
Tire Pressure (Front) - 97 kPa (14 psi)
Tire Pressure (Rear) - 69 kPa (10 psi)

JD L108 Capacities

Crankcase without oil filter - 1.4 L (1.5 qt)
Crankcase with oil filter - 1.65 L (1.75 qt)
Fuel - 7.9 L (2.1 gal)

Dimensions

Height - 98 cm (38.6 in.)
Length (Overall) - 175 cm (69 in.)
Width (Overall) - 91 cm (36 in.)
Weight - 210 kg (462 lb)

John Deere L108 Mower Deck

Mower Deck - 107 cm (42 in.)
Blades-Rotary - 2
Blade Bolt Torque - 62 Nm (46 lb-ft)
Cutting Height-Approx. - 25-102 mm (1-4 in.)
Cutting Width - 1067 mm (42 in.)

Mower Deck - 122 cm (48 in.)
Blades-Rotary - 3
Blade Bolt Torque - 62 Nm (46 lb-ft)
Cutting Height-Approx. - 25-102 mm (1-4 in.)
Cutting Width - 1219 mm (48 in.)

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