________________________________________________________________________________________
John Deere L100 Troubleshooting
The
John Deere L100 lawn tractor was manufactured between 2003 and 2005. The John
Deere L100 driveline system components: a 30.6 cu.in (501 cc) Briggs and
Stratton 31F707 4-cycle single cylinder OHV air-cooled gasoline engine with a
rated power of 17 hp (12.7 kW), and Dana 4360 belt-driven gear transmission with
5 forward and 1 reverse gears.
The engine has a float type carburetor, pulse type fuel pump, and full
pressure lubrication system including oil pump with filter. The maximum
forward speed - 5 mph (8 km/h), maximum reverse speed - 2.3 mph (3.7
km/h).
The John Deere L100 is equipped with a manual steering system, wet disc
brakes, 15x6.00-6 front tires, and 20x8.00-8 rear tires. The wheelbase
is 49" (1240 mm). The tractor is compatible with the following
attachments: a 42" mid-mount 2-blade mower deck with cutting height of
1.0-4.0" (25-102 mm) and manual lift system, 46" front blade with lift
height of 6.5" (160 mm), and 42" front-mount 2-stage snowblower with
clearing height of 21" (530 mm).
| Engine Troubleshooting |
| Engine starts up hard or doesn't start |
| Fuel tank is empty - Fill fuel up |
| Wrong grade of gasoline - Use correct gasoline grade |
| Air in fuel tank - Bleed fuel tank |
| Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace |
| Faulty spark plug - Change spark plug as required |
| Clogged fuel filter - Replace fuel filter |
| Brake pedal not depressed - Press the brake pedal |
| Problems with carburetor adjustment - Adjust as required |
| Bad engine compression - Inspect cylinder block and replace worn components |
| Not adjusted or damaged throttle cable - Replace cable or adjust properly |
| Cooling fins are clogged - Need to wash or clean |
| Ignition system problems - Inspect ignition system and change faulty parts |
| Faulty or stuck choke cable - Change or service the cable |
| Air filter is dirty - Change or clean air filter |
| Dirty or faulty fuel pump - Test fuel pump and replace if necessary |
| Engine starts and then stalls |
| Faulty spark plug - Change spark plug as required |
| Clogged or faulty carburetor - Service or repair carburetor |
| Ignition coil is damaged - Ignition coil should be replaced |
| Valve springs are bad or broken - Change valve springs |
| Valves sticking - Clean the valves |
| Engine oil insufficient - Fill up the engine oil |
| Engine is overloaded - Reduce engine load |
| Clogged cooling fins - Need to clean or wash |
| Too lean fuel mixture in carburetor - Make the correct settings |
| Wrong ignition timing - Ignition timing needs to be adjusted correctly |
| Valve setting is improper - Valves needs to be adjusted properly |
| Abnormal engine noise or knocking |
| Stale fuel - Change fuel |
| Engine is overloaded - Load reducing is recommended |
| Low engine oil level - Check and refill engine oil |
| Low idle speed set incorrectly - Correct idle settings |
| Clogged or damaged fuel pump - Service or replace fuel pump |
| Worn crankshaft or main bearings - Crankshaft or bearings need to be replaced |
| Improper valve clearance - Adjustment procedure required |
| Piston rings or cylinder bore are worn - Change defective components |
| Clogged or improperly adjusted carburetor - Clean or correctly adjust carburetor |
| Air filter is dirty - Clean or change air filter |
| Fuel pump is clogged or faulty - Service or change fuel pump |
| Ignition system is defective - Inspect ignition system and change failed components |
| Damaged cylinder-head gasket - Cylinder-head gasket replacement required |
| Burned or stuck valves - Clean or replace valves |
| Push rod is bent or worn - Change push rod |
| Cylinder block parts are faulty - Change defective parts |
| Engine uses too much fuel |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Incorrect adjustment of carburetor main jet - Adjust it properly |
| Spark plug is faulty or loose - Tighten or replace spark plug |
| Valves are worn, burned or stuck - Replace or service valves |
| Sleeve, piston, or rings are damaged - Change defective parts |
| Valve clearance is wrong - Need to adjust valve clearance |
| Engine oil consumption is too high |
| Gaskets or seals are excessively worn - Replace defective parts |
| Valve stems and guides are worn - Valves must be replaced |
| Worn or broken piston rings - Have piston rings replaced |
| Scored cylinder liner or piston - Inspect piston and liner, replace as required |
| Breather pipe or hose is clogged - Service or replace |
| Transmission Troubleshooting |
| Hard to shift gears |
| Loose or broken gear shift linkage - Change defective shift linkage |
| Damaged or worn shift forks - Replace defective shift forks |
| Faulty gear shifting mechanism - Faulty parts must be changed |
| Transmission makes excessive noise |
| Insufficient fluid supply - Fill the transmission housing with fluid |
| Transmission oil is contaminated - Fill up with fresh transmission oil |
| Gears or bearings are damaged - Change bearings or gears |
| Transmission pops out of gear |
| Improperly installed or bent gear shift lever - Change or install shift lever properly |
| Worn or damaged gear teeth - Replace defective gears |
| Worn shift rods or shift forks - Replace defective rods or forks |
| Drive shaft/belt is improperly adjusted or damaged - Adjust or replace belt/shaft |
| Incorrect clutch/brake adjustment or worn clutch/brake - Adjust or replace clutch/brake |
| Damaged or worn drive pulley - Install a new pulley |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Damaged or clogged mower drive pulley - Change or clean pulley |
| Drive belt is worn or loose - Change belt or adjust belt tension |
| Cutting blades are bent or unbalanced - Balance blades or replace it |
| Blade mounting bolts are loose - Tighten it fast |
| Discharge chute keeps clogging |
| High mowing speed - Need to slow down |
| Tall grass - Must be set to low cutting height |
| Reduced engine rpm - Choke is not fully opening |
| Cutting height is too low - Use correct cutting height |
| Incorrect mower drive belt installation - Drive belt must be installed correctly |
| Cutting deck clogging - Need to clean the mower deck |
| Blades are not sharp - Sharpen the blades |
| Worn or damaged blades - Blades need to be replaced |
| Fast ground speed - Use a slower speed |
| Cutting level is too low - Must be set to high cutting height |
| Filled grass bag - Remove grass from bag |
| Blades are scalping the grass |
| Uneven or bumpy lawn - Lawn leveling required |
| Mower deck cutting height is set too low - Use correct cutting height |
| High ground speed - Use a slower speed |
| Deck level is not correct - Level the deck properly |
| Blades are worn or bent - Change the blades |
| Low tire pressure - Inflate tires as required |
| Tires are not properly inflated - Inflate tires as required |
| Improperly leveled mower deck - Adjust the level of mower deck correctly |
| Not sharp blades - Sharpen the blades |
| Blades are worn or damaged - Replace the blades |
| Clogged mower deck - Check cutting deck and clean as necessary |
| Deck housing is damaged - Replace or rebuild mower deck |
| Loose or faulty mower spindle - Repair or replace the spindle |
| Electrical Troubleshooting |
| Battery won’t charge |
| Loose or corroded electrical wiring connections - Tighten or clean connections |
| Faulty electrical terminal connectors - Install new terminal connectors |
| Dead cell in battery - Change the battery |
| Low battery output - Battery needs to be recharged |
| Battery runs out quickly - Service charging system or change battery |
| Disconnected battery cables or bad terminals - Connect wiring correctly or install new terminals |
| Starter motor is not working |
| Battery is discharged or defective - Recharge or change battery |
| Battery wires are disconnected or incorrectly connected - Check wires and connect correctly |
| Low battery capacity - Battery needs to be recharged |
| Spark plug worn or incorrectly gapped - Replace or clean and gap |
| Starter motor or solenoid is damaged - Repair starter or change solenoid |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
| Lawn and Garden Tractors Technical Specs |
