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Craftsman DYT 4000 Troubleshooting
The
Craftsman DYT 4000 lawn tractor was manufactured between 2004 and 2005. The
Craftsman DYT4000 is powered by Briggs and Stratton 4-cycle V-twin
vertical-shaft air-cooled gasoline engines.
A 40 cubic inches (656 cc) Briggs 407577 engine has a maximum power of
21 Hp (15.7 kW). A 44 cubic inches (724 cc) Briggs 445677 engine has a
maximum power of 24 Hp (17.8 kW). The Craftsman DYT 4000 is fitted with
2 transmission options: Hydro-Gear 314-0510 belt-driven hydrostatic
transmission or 6x1 Peerless 206 gear transmission.
Max. travel speed (forward/reverse): 5.9 mph (9.5 kph) and 2.4 mph (3.9
kph). The tractor is equipped with 15x6.00-6 front tyres and 20x10.0-8
rear tyres. The Craftsman DYT 4000 is compatible with a 42" mid-mount
2-blade mower deck with cutting height of 1.5-4.0 inches (37-100 mm) and
mechanical lift system.
| Engine Troubleshooting |
| Engine doesn't start or difficult to start |
| No fuel in fuel tank - Add gasoline |
| Wrong grade of gasoline - Use correct fuel grade |
| Air trapped in fuel system - Bleed air |
| Spark plug wire is disconnected or loose - Inspect spark plug wiring connection, change or repair |
| Damaged spark plug - Change spark plug |
| Dirty fuel filter - Fuel filter needs changing |
| Safety contact for brake pedal defective - Install new part |
| Carburetor is not working properly - Inspect and adjust |
| Poor compression - Inspect and replace wear parts |
| Improperly adjusted or worn throttle cable - Adjust properly or replace the cable |
| Clogged cooling fins - Clean and wash as required |
| Ignition system problems - Test ignition and replace failed parts |
| Stuck or defective choke cable - Service or change the cable |
| Air filter element is plugged - Clean or change air filter |
| Clogged or defective fuel pump - Clean or install new fuel pump |
| Engine stops after starting |
| Spark plug is damaged - Install new spark plug |
| Carburetor is defective or clogged - Service or replace carburetor |
| Damaged ignition coil - Ignition coil must be replaced |
| Bad or broken valve springs - Change valve springs |
| Valves are stuck - Valves need to be cleaned |
| Engine oil insufficient - Need to add engine oil |
| Engine overload - Reduce the load |
| Cooling fins are blocked - Clean and wash as required |
| Carburetor is running lean - Set the carburetor correctly |
| Incorrect ignition timing - Adjust ignition timing as required |
| Valve setting is wrong - Adjust valves correctly |
| Abnormal engine knocking or noise |
| Low octane gasoline - Use proper gasoline |
| Engine is under excessive load - Load reducing required |
| Not enough engine oil - Fill up the oil to required level |
| Too low idle RPM - Adjust the low idle speed |
| Dirty or damaged fuel pump - Check fuel pump and replace if necessary |
| Crankshaft or main bearings wear - Change defective components as required |
| Valve clearance is not correct - Adjust valve clearance according to specifications |
| Cylinder bore or piston rings are worn - Replace defective parts |
| Engine power is insufficient |
| Carburetor is incorrectly adjusted or dirty - Service or correctly adjust carburetor |
| Plugged air filter - Change or clean air filter |
| Fuel pump is clogged or faulty - Clean or change fuel pump |
| Defective ignition - Check ignition and replace faulty components |
| Worn cylinder head gasket - Install new head gasket |
| Stuck or burned valves - Change or service valves |
| Worn or defective push rod - Replace push rod |
| Worn cylinder block components - Replace defective components as required |
| Throttle is not fully open - Change or adjust throttle cable |
| Improper adjustment of carburetor main jet - Adjust it correctly |
| Spark plug is loose or faulty - Spark plug need to be replaced or tightened |
| Valves are stuck, worn, or burned - Replace or clean valves |
| Rings, sleeve, or piston are damaged - Replace faulty parts as required |
| Incorrect valve clearance - Adjust to proper valve clearance |
| Seals or gaskets are wearing excessively - New components need to be installed |
| Valve guides or stems are damaged - Valves replacement required |
| Piston rings are stuck or worn - Piston rings replacement required |
| Cylinder liner or piston is scuffed - Inspect piston and liner, replace as required |
| Blocked breather hose or pipe - Clean or change |
| Transmission Troubleshooting |
| Gears are hard to shift |
| Gear shift linkage is rusty or worn - Lubricate or replace the shift linkage |
| Damaged or worn shift forks - Change defective shift forks |
| Worn out parts of the gearshift mechanism - Replace worn parts |
| Excessive transmission noise |
| Lack of transmission fluid supply - Add fluid as required |
| Oil contamination - Change transmission oil |
| Gears or bearings are damaged - Replace gears or bearings |
| Transmission jumping out of gear |
| Shift lever is bent or installed incorrectly - Change or install shift lever properly |
| Worn or damaged gears - Change defective gears |
| Worn shift rods or shift forks - Change defective rods or forks |
| Incorrect drive belt/shaft adjustment or worn drive belt/shaft - Adjust or replace belt/shaft |
| Faulty clutch/brake or incorrect clutch/brake adjustment - Adjust clutch/brake or install a new one |
| Drive pulley is worn or faulty - Change pulley |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission is making noise |
| Defective or not adjusted speed control pedal linkage - Replace or adjust linkage |
| Transmission overload - Reduce the load is required |
| Low transmission oil level or contaminated oil - Add oil to proper level or pour fresh transmission oil |
| Transmission parts are worm or defective - Replace or repair defective components |
| Corroded or worn shift linkage - Lubricate or change linkage |
| Defective or stuck hydrostatic pump - Change or repair pump |
| Damaged or unadjusted transmission shift control components - Change or adjust correctly |
| Low fluid level - Add fluid to the transmission housing |
| Worn or damaged drive sheave - Change sheave |
| Shifting linkage is broken or misadjusted - Adjust properly or change linkage |
| Worn or out of adjustment speed control linkage - Repair or adjust linkage |
| Broken transmission gaskets or seals - Change seals or gaskets |
| Leaking final drive shaft - Change shaft seals |
| Cracked transmission housing - Replace housing or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Damaged or clogged mower drive pulley - Replace or service pulley |
| Defective or loose drive belt - Change belt or adjust belt tension |
| Warped or not balanced mower blades - Change or balance blades |
| Blade mounting bolts are loose - Bolts need to be tightened |
| Discharge chute is constantly plugged |
| High mowing speed - Select a slower speed |
| Grass is too long - Must be set to low cutting height |
| Reduced engine speeds - Open throttle fully |
| Mower cuts too low - Must be set to high cutting height |
| Mower drive belt installation is improper - Install drive belt as required |
| Lawn mower leaving uncut grass |
| Deck is plugged with grass - Clean out the mower deck |
| Blades are too dull - Need to sharpen the blades |
| Worn or damaged blades - Blades need to be replaced |
| High mowing speed - Select a lower speed |
| Mower deck set to low cutting - Adjust mower to higher cutting height |
| Full bagger - Bagger must be empty |
| Lawn is bumpy or not smooth - Lawn leveling required |
| Mower deck set to low cutting - Raise the cutting height |
| Ground speed is too fast - Select a slower speed |
| Deck level is not correct - Level the deck correctly |
| Blades are bent or worn - Change the blades |
| Tires are not correctly inflated - Inflate tires correctly |
| Tires are not properly inflated - Need to inflate tires |
| Deck is not leveled correctly - Adjust mower deck level properly |
| Blades are not sharp - Need a blade sharpening |
| Bent or worn blades - Blades need to be replaced |
| Cutting deck is clogged - Mower deck needs to be cleaned |
| Deck shell is broken - Repair or replace the deck |
| Mower spindle is bent or loose - Repair or replace the spindle |
| Electrical Troubleshooting |
| Battery won’t charge |
| Electrical cable connections are corroded or loose - Service or tighten connections |
| Faulty battery terminal clamps - Replace terminal clamps |
| Bad cell in battery - Battery change required |
| Starter motor cranks slow |
| Low battery power - Battery needs to be recharged |
| Battery will not hold charge - Service charging system or change battery |
| Disconnected cables or faulty battery terminals - Check battery wires and service or replace terminals |
| Battery is discharged or worn - Change or recharge battery |
| Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required |
| Low battery output voltage - Low battery charging, charge as required |
| Incorrectly gapped or worn spark plug - Clean, gap or change spark plug |
| Starter motor or solenoid failing - Repair starter or change solenoid |
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| Lawn and Garden Tractors Technical Specs |
