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Craftsman GT6000 Troubleshooting

The Craftsman GT6000 is a garden tractor from AYP built. This model was manufactured between 1991 and 1997. The tractor could be equipped with five engine options: Kohler MV18S gasoline engine with a rated power of 18 Hp (13.4 kW), Kohler MV20S gasoline engine with a rated power of 20 Hp (14.9 kW), Kohler Magnum M20QS gasoline engine with a rated power of 20 Hp (14.9 kW), Kohler Command CV20S gasoline engine with a rated power of 20.5 Hp (15.3 kW), or Briggs and Stratton 422707 gasoline engine with a rated power of 18 Hp (13.4 kW).

The Craftsman GT6000 is fitted with a 2 transmission options: gear transmission with 6 forward and 2 reverse gears, or Hydro Gear hydrostatic transmission with infinite forward and reverse gears. The maximum forward speed - 5.6 mph (9 kph), maximum reverse speed - 2.5 mph (4 kph). The Craftsman GT6000 tractor is equipped with a manual steering, mechanical disc brakes, 16x7.50-8 front tires, and 23x10.50-12 rear tires. The tractor is compatible with the following attachments: a 42" mid-mount 2-blade mower deck, and 44", 46" or 50" mid-mount 3-blade mower decks.

Engine Troubleshooting
Engine hard to start or doesn't start
Gas tank is empty - Add fuel
Incorrect fuel grade - Use quality gasoline
Clogged fuel system - Remove clogging
Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace
Spark plug is damaged - Spark plug need to be replaced
Plugged fuel filter - Change fuel filter
Brake pedal not pushed down - Push the brake pedal down
Carburetor incorrectly set - Set carb correctly
Poor engine compression - Check cylinder block and replace damaged components
Worn or improperly adjusted choke cable - Replace cable or adjust properly
Engine runs irregularly
Cooling fins are clogged - Need to clean or wash
Ignition system failure - Check ignition and replace faulty components
Stuck or faulty choke cable - Service or change the cable
Dirty air filter element - Change or clean air filter
Fuel pump is faulty or clogged - Check fuel pump and change if required
Engine starts and stops
Faulty spark plug - Replace spark plug
Clogged or defective carburetor - Service or change carburetor
Ignition coil is defective - Install a new ignition coil
Valve springs are loose or broken - Valve springs need to be changed
Stuck valves - Valves must be cleaned
Engine overheats
Engine oil level is low - Fill up the oil to required level
Excessive engine load - Load reducing is recommended
Clogged cooling fins - Wash or clean as required
Carburetor mixture is too lean - Use proper settings
Ignition timing is incorrect - Set the ignition timing correctly
Incorrect valve setting - Set the valves properly
Engine noise or knocking
Low octane fuel - Use correct gasoline
Engine is overloaded - Reduce engine load
Engine oil level low - Add oil to the engine crankcase
Low idle speed set incorrectly - Correct the settings
Clogged or damaged fuel pump - Clean or replace fuel pump
Crankshaft or main bearings are worn out - Install new parts as as required
Valve clearance is incorrect - Check and adjust
Cylinder bore or piston rings are damaged - Replace faulty parts
Lack of engine power
Carburetor is incorrectly adjusted or clogged - Service or correctly adjust carburetor
Air filter element is clogged - Service or change air filter
Dirty or damaged fuel pump - Test fuel pump and replace if necessary
Ignition system problems - Inspect ignition system and change failed components
Cylinder head gasket is blown - Install new cylinder head gasket
Valves are burned or stuck - Service or change valves
Push rod is worn or bent - Push rod needs to be changed
Worn cylinder block parts - Replace defective components as required
Engine uses too much fuel
Choke is not fully open - Check choke cable and adjust it
Carburetor main jet adjustment is incorrect - Adjust it properly
Loose or faulty spark plug - Tighten or replace spark plug
Stuck, worn, or burned valves - Clean or replace valves
Sleeve, rings, or piston are damaged - Replace defective components as required
Improper valve clearance - Adjust valve clearance according to specifications
High oil consumption
Gaskets or seals can be faulty - To repair leaks, replace worn parts
Worn valve stems and valve guides - Valves must be replaced
Stuck or worn piston rings - Have piston rings replaced
Worn cylinder liner or piston - Check liner and piston, install new components as required
Breather pipe or hose is clogged - Clean or change

Transmission Troubleshooting
Hard shifts
Stuck or damaged gear shift linkage - Replace or repair the shift linkage
Worn or damaged gear shift forks - Change defective shift forks
Worn parts of the gear shifting mechanism - Change worn parts
Transmission makes excessive noise
Transmission oil insufficient - Fill up the transmission oil
Transmission fluid contamination - Change transmission fluid
Worn gears or damaged bearings - Replace faulty parts
Transmission jumps out of gear
Damaged or improperly installed shifting lever - Install the lever correctly or replace it
Gear teeth are damaged or worn - Install new gears
Faulty shift rods or shift forks - Change defective forks or rods
Transmission slips
Drive shaft/belt is damaged or improperly adjusted - Adjust or change belt/shaft
Improper clutch/brake adjustment or faulty clutch/brake - Install a new brake/clutch or adjust it
Drive pulley is damaged or worn - Install a new pulley

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission is excessively noisy
Bent or unadjusted speed control pedal linkage - Repair or adjust linkage
Excessive transmission load - The load should be reduced
Low transmission oil level or contaminated oil - Add oil to proper level or pour fresh transmission oil
Damaged or worn components of hydrostatic transmission - After disassembly and inspection, replace defective components
Hard shifting
Loose or broken shift linkage - Change defective linkage
Blocked or faulty hydrostatic pump - Repair or replace pump
Faulty or misadjusted transmission shift control parts - Adjust properly or change
Loss of power
Transmission fluid level is low - Fill the transmission housing to proper fluid level
Drive sheave is defective or worn - Replace sheave
Faulty or unadjusted shifting linkage - Replace or adjust linkage
Speed control linkage is defective or unadjusted - Adjust or change linkage
Transmission leaks
Transmission gaskets or seals are worn - Seals and gaskets need to be replaced
Final drive shaft is leaking - Shaft seals need to be changed
Transmission housing is cracked - Housing needs to be replaced

Mower Deck Troubleshooting
Mower vibrates too much
Worn or dirty mower drive pulley - Clean or replace pulley
Loose or worn drive belt - Install a new belt or adjust belt tension
Mower blades are not balanced or warped - Balance or change blades
Blade mounting bolts are loose - Bolts need to be tightened
Constant clogging of discharge chute
Ground speed is too fast - Use a lower speed
Long grass - Need to set low cutting height
Engine is running at too low speed - Adjust carburetor to higher rpm
Mower deck set to low cutting - Need to set high cutting height
Drive belt installed improperly - Reinstall drive belt properly
Mower leaving random uncut of grass
Deck is plugged with grass - Check cutting deck and clean as necessary
Blades are excessively dull - Sharpen the blades
Blades are defective or worn - Install new blades
High ground speed - Use a slower speed
Cutting height is too low - Need to set high cutting height
Bagger is overfilled - Empty the bagger
Blades are scalping the grass
Lawn is uneven or bumpy - Level the lawn
Cutting level is too low - Raise the cutting height
Fast ground speed - Use a slower speed
Incorrectly leveled mower deck - Deck should be adjusted correctly
Bent or worn blades - Install new blades
Low tire inflation - Inflate tires as required
Mower deck to cut unevenly
Tires are not correctly inflated - Inflate tires as required
Improper mower deck level - Level the deck correctly
Excessive blade dullness - Sharpen the blades
Damaged or worn blades - Replace the blades
Deck clogged with grass clippings - Inspect and clean cutting deck
Deck housing is broken - Rebuild or change mower deck
Bent or loose mower spindle - Repair or change the spindle

Electrical Troubleshooting
Battery is not charging
Corroded or loose wire connections - Tighten or service cable connections
Defective battery terminal connectors - Replace terminal connectors
Battery is worn - Install a new battery
Starter turns slowly
Battery voltage is low - Charge the battery
Battery will not hold charge - Battery needs to be serviced or replaced
Disconnected battery cables or bad terminals - Check cable connections and change or clean terminals
Starter is not cranking
Battery is drained or worn - Charge or replace the battery
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly
Battery voltage is low - Battery is drained, charge it
Spark plug worn or incorrectly gapped - Clean, gap or change spark plug
Starter motor or solenoid is damaged - Change solenoid or repair starter



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