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John Deere X485 Troubleshooting
The
John Deere X485 garden tractor from HD GT X Series was manufactured between 2002
and 2005. The John Deere X485 tractor is powered by Kawasaki FD711D 4-cycle
V-Twin cylinder OHV horizontal shaft air-cooled gasoline engine. A 45.5 cubic
inches (745 cc) engine has a cylinder bore of 3.07" (78 mm), piston stroke of
3.07" (78 mm), and rated power of 25 Hp (18.6 kW). This model is fitted with a
belt-driven hydrostatic transmission with infinite forward and reverse gears.
The John Deere X485 is equipped with a hydrostatic power steering,
electric PTO clutch, integral wet disc brakes, 18x8.50-8 front tyres,
and 26x12.00-12 or 26x10.50-12 rear tyres. The operating weight is 845
lbs (383 kg). Compatible attachments for the tractor: 48", 54", or 62"
mid-mount 3-blade mower deck with cutting height of 1.0-4.0" (25-102
mm), 46" front-mount single-stage snowblower with hydraulic lift, 54"
front blade, and John Deere 45 front-end loader.
| Engine Troubleshooting |
| Engine will not start or difficult to start |
| No fuel in fuel tank - Add fuel |
| Incorrect fuel grade - Use quality fuel |
| Dirty fuel system - Check and clean |
| Loose or disconnected spark plug wire - Inspect spark plug wiring connection, change or repair |
| Spark plug is damaged - Change spark plug |
| Fuel filter is dirty - Replace fuel filter |
| Brake pedal not pushed down - Push the brake pedal down |
| Carburetor problems - Carburetor diagnostics required |
| Low cylinder compression - Check cylinder block and replace worn parts |
| Worn or unadjusted choke cable - Change cable or adjust correctly |
| Cooling fins are clogged - Need to wash or clean |
| Ignition system is defective - Check ignition system and replace faulty parts |
| Throttle cable is stuck or defective - Clean or change the cable |
| Clogged air filter - Change or clean air filter |
| Dirty or defective fuel pump - Inspect fuel pump and change as required |
| Engine starts and then stalls |
| Defective spark plug - Change spark plug |
| Carburetor is clogged or defective - Clean or replace carburetor |
| Faulty ignition coil - Ignition coil must be replaced |
| Valve springs are loose or broken - New valve springs need to be installed |
| Valves are stuck - Service the valves |
| Lack of engine oil - Add oil to the engine crankcase |
| Engine overloaded - Load reducing required |
| Air intake screen is blocked - Clean and wash as required |
| Carburetor is running lean - Adjust carburetor properly |
| Bad ignition timing - Ignition timing needs to be adjusted correctly |
| Valve setting is wrong - Set the valves correctly |
| Stale or low octane fuel - Change gasoline |
| Engine overloaded - Load reducing is recommended |
| Not enough engine oil - Add oil to the engine crankcase |
| Incorrectly set low idle speed - Adjust idling as required |
| Fuel pump is defective or dirty - Service or replace fuel pump |
| Main bearings or crankshaft failure - Have bearings or crankshaft replaced |
| Valve clearance is incorrect - Need to adjust valve clearance |
| Piston rings or cylinder bore are damaged - Replace faulty components |
| Improperly or clogged carburetor - Service or correctly adjust carburetor |
| Air filter is dirty - Replace or clean air filter |
| Dirty or damaged fuel pump - Service or change fuel pump |
| Ignition system failure - Check ignition and replace faulty components |
| Cylinder head gasket is damaged - Install new cylinder head gasket |
| Burned or stuck valves - Clean or change valves |
| Push rod is worn or damaged - Replace push rod |
| Cylinder block components are worn - Replace defective components as required |
| Engine uses too much fuel |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Carburetor main jet adjustment is incorrect - Adjust the carburetor main jet correctly |
| Spark plug is loose or faulty - Spark plug need to be replaced or tightened |
| Stuck, burned, or worn valves - Clean or change valves |
| Worn sleeve, piston, or rings - Replace defective components |
| Valve clearance is improper - Adjust to proper valve clearance |
| Gaskets or seals may be damaged - Change worn parts according to specifications |
| Valve stems and guides are worn - Valves replacement required |
| Seized or wear piston rings - Change the piston rings as required |
| Damaged cylinder liner or piston - Inspect piston and liner, replace as required |
| Clogged breather pipe or hose - Service or change |
| Hydrostatic Transmission Troubleshooting |
| Excessive HST transmission noise |
| Bent or unadjusted speed control pedal linkage - Change or adjust linkage |
| Transmission overload - The load should be reduced |
| Dirty transmission fluid or insufficient fluid level - Pour fresh fluid or add transmission fluid to proper level |
| Worn or defective transmission components - Change or repair defective parts |
| Damaged or loose shift linkage - Change or repair linkage |
| Seized or worn hydrostatic pump - Change or repair pump |
| Transmission shift control parts are damaged or misadjusted - Adjust properly or change |
| Insufficient transmission fluid - Need to add transmission fluid |
| Worn or defective drive pulley - Change pulley |
| Faulty or unadjusted shifting linkage - Adjust correctly or replace linkage |
| Worn or out of adjustment speed control linkage - Change or adjust linkage |
| Transmission seals or gaskets are broken - Change seals or gaskets |
| Leaking final drive shaft - Shaft seals need to be changed |
| Transmission housing is cracked - Housing needs to be replaced |
| Mower Deck Troubleshooting |
| Mower vibration is excessive |
| Clogged or damaged mower drive sheave - Clean or replace sheave |
| Loose or damaged drive belt - Adjust belt tension or change the belt |
| Cutting blades are not balanced or warped - Change or balance blades |
| Blade mounting bolts are loose - Bolts should be tightened |
| Discharge chute regular clogging |
| Fast ground speed - Select a lower speed |
| Tall grass - Adjust mower to lower cutting height |
| Engine runs at low revs - Open choke fully |
| Mower deck set to low cutting - Use a higher cutting height |
| Drive belt installed improperly - Install drive belt as required |
| Mower leaving random uncut of grass |
| Mower deck is clogged - Clean mower deck as required |
| Excessive blade dullness - Sharpen the blades |
| Worn or damaged blades - Blades must be changed |
| Fast mowing speed - Select a slower speed |
| Cutting height is too low - Change cutting height adjustment |
| Grass bag is full - Grass bag must be empty |
| Bumpy or not smooth lawn - Roll or level the lawn |
| Mower deck set to low cutting - Raise the cutting height |
| Ground speed is too fast - Need to slow down |
| Mower deck is not leveled properly - Adjust the level of mower deck correctly |
| Worn or bent blades - Change the blades |
| Tire pressure is too low - Inflate tires correctly |
| Tire pressure is too low - Check and inflate the tires |
| Incorrectly leveled mower deck - Adjust the level of mower deck correctly |
| Blades are not sharp - Need to sharpen the blades |
| Damaged or worn blades - Blades need to be replaced |
| Cutting deck is clogged - Inspect and clean cutting deck |
| Deck housing is damaged - Repair or replace the deck |
| Loose or defective mower spindle - Change or repair the spindle |
| Electrical Troubleshooting |
| Battery will not charge |
| Electrical cable connections are loose or corroded - Clean or tighten wiring connections |
| Faulty electrical terminal connectors - Replace terminal connectors |
| Battery bad cell - Battery change required |
| Low battery output voltage - Low battery charging, charge as required |
| Battery does not hold charge - Service charging system or change battery |
| Disconnected cables or faulty battery terminals - Check cable connections and replace or service terminals |
| Battery is low or faulty - Recharge or change battery |
| Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required |
| Low battery voltage - Recharge the battery |
| Improperly gapped or dirty spark plug - Clean, gap or change spark plug |
| Faulty solenoid or starter motor - Repair starter or install a new solenoid |
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| Lawn and Garden Tractors Technical Specs |
