Specifications, Service and Repair of Farm and Lawn Tractors

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John Deere STX30 Specs

Engine Specifications

Engine model - Kohler Command LT CV12.5
Type - Gasoline, Air Cooled, Single Cylinder, 4-Cycle, Overhead Valves
Crankcase Oil Capacity (with filter) - 1.8 L (1.9 U.S. qt)
Oil Type - (Warm Climate) - 10W30 (Warm Climate) / 5W30 (Cold Climate)
Power (3600 RPM, corrected to SAE J1995) - 9.33 kW (12.5 HP)
Max Torque (RPM indicated) - 27.8 Nm (20.5 ft. lb.) /2500
Bore - 87 mm (3.43 in.)
Stroke - 67 mm (2.64 in.)
Displacement - 398 cc (24.3 cu. in.3)
Compression Ratio - 8.5:1
Compression Release - Automatic/Centrifugal
Crankshaft Type - Vertical (counterbalanced)
Weight (approx.) - 39.54 kg (87 lb.)
Oil Capacity (approx.) - 1.9 L (2.0 U.S. qt.)
Lubrication - Gerotor Pump (0—60 psi)
Oil Filter - Full Flow (W/O By-Pass Valve)
Oil - John Deere Turf-Gard
Lubrication Interval - 50 Hours First Change, Every 100 Hours After or Yearly
Air Cleaner Base Nut Torque - 9.9 Nm (88 in.lb.)
Air Cleaner Wing Nut Torque - 1.5 Nm (12 in.lb.)
Angle of Operation - Maximum (at full oil level) Intermittent / Continuous - 35 / 20 degrees
Carburetor - Walbro
Carburetor Type - Side Draft
Throttle/Choke - Unitized Control Linkage
Carburetor Fuel Shut-Off Solenoid (Optional) - Electric
Fuel Delivery - Gravity Flow
Fuel Filter - Replaceable Paper (in-line type)
Fuel Type - Unleaded (87 octane minimum)
Fuel Tank Capacity - 4.7 L (1.25 gal)
Fuel Shut-Off Valve - Replaceable (In-Line Type)
Fuel Shut-Off Solenoid (Optional) - Replaceable (Below Carburetor Float Bowl)
Air Filter - Paper Element with Foam Pre-cleaner
Muffler Type - Anti-Backfire
Gasoline/Alcohol Blends - Up To 10% Ethyl Alcohol-90% Unleaded (By Volume)
Gasoline/Ether Blends - Up To 15% MTBE-85% Unleaded (By Volume)

John Deere STX30 Electrical

Charging System - Flywheel/Electronic Magneto
Magneto Air Gap - 0.2-0.3 mm (0.008-0.012 in.)
Charging Capacity - 15 amp (regulated)
Spark Plug - Champion RC12YC
Spark Plug Air Gap - 1.0 mm (0.040 in.)
Battery Type - BCI Group, U1
Battery Reserve Capacity - 23 min. at 25 amp
Battery Cold Cranking Amp - 25 amp at 27C (0F) for 20 minutes
Battery Specific Gravity - Above 1.225 Points
Starter Type - Bendix Inertia Drive
PTO Clutch Type - Electric (Manufactured by Warner)
Fuel Shut-Off Solenoid (Optional) - Replaceable (Below Carburetor Float Bowl)
Headlight Kit (Optional) - Two Bulbs-Each 12 Volt/23W/1.9 Amp Draw

JD STX30 Transaxle

Gear Transaxle - Dana
Transaxle Model - Spicer Heavy-Duty 4360 Transaxle
Type - Five-Speed/Linear Shift
Brake Type - Single, External Brake Disc With Dual Friction Pucks

Traction Drive Belt

Type - Gear
Actual effective length - 2660±8 mm (104.7±0.3 in.)
Theoretical effective length (short) - 2631 mm (103.6 in.)
Theoretical effective length (long) - 2710 mm (106.7 in.)

John Deere STX30 Chassis

Wheelbase - 1135 mm (44.69 in.)
Overall Length - 1524 mm (60 in.)
Overall Width (w/o mower deck) - 908 mm (35.75 in.)
Height - 980 mm (38.6 in.)
Horizontal Pull Maximum - 250 N (56 lbs)
Tongue Weight Maximum - 65 N (15 lbs)
Trailer Load Maximum - 136 kg (300 lbs)
Trailer Tongue Weight Maximum - 23 kg (50 lbs)

Steering

Steering Type - Manual-Pinion/Sector
Axle Pivot Hub - Shim Adjustable
Lubrication - DuBois MPG-2 Multipurpose Grease
Lubrication Interval - 10 hrs (maximum)
Toe-In - 6 mm (0.24 in.)-Non-Adjustable
Turning Radius - 584 mm (23 in.)

JD STX30 Wheels and Tires

Front Wheels - 6.0x4.50
Rear Wheels - 8.0x6.18
Front Tires - 13x5-6 NHS (2 ply)
Rear Tires - 18x6.50-8 NHS (2 ply)
Front Tires Pressure (with mower deck) - 83 kPa (12 psi)
Rear Tires Pressure (with mower deck) - 97 kPa (14 psi)

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JOHN DEERE LAWN TRACTORS SPECIFICATIONS

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ENGINES FOR JOHN DEERE LAWN TRACTORS

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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

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JOHN DEERE FRONT END LOADERS

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

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JOHN DEERE FARM TRACTORS SPECIFICATIONS

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