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Husqvarna LTH 126 Troubleshooting
The
Husqvarna LTH 126 lawn tractor was manufactured by AYP built from 2009 to 2013.
The tractor could be equipped with two engine options: 21.1 cu.in (344 cc)
Briggs and Stratton 21R707 Intek 4-cycle single cylinder OHV vertical shaft
air-cooled gasoline engine with a rated power of 11.5 Hp (8.5 kW), or 21.1 cu.in
(344 cc) Briggs and Stratton 219807 Power Built 4-cycle single cylinder OHV
vertical shaft air-cooled gasoline engine with a rated power of 12.5 Hp (9.3
kW).
The Husqvarna LTH126 tractor is fitted with Hydro-Gear T2 belt-driven
hydrostatic transmission with infinite forward and reverse gears. The
maximum forward speed - 5 mph (8 km/h), maximum reverse speed - 2.2 mph
(3.5 km/h).
The Husqvarna LTH 126 lawn mower is equipped with a manual steering,
pneumatic wheels, 13x5.00-6 front tires, and 16x6.50-8 rear tires. The
tractor is compatible with a 30" mid-mount 1-blade mower deck with
cutting height of 0.8-3.2 in (20-80 mm), manual blade engagement, 6 cut
positions, and mechanical lift system with hand operated.
| Engine Troubleshooting |
| Engine won't start or hard to start |
| No fuel in fuel tank - Fill gasoline up |
| Low-quality gasoline - Change gasoline |
| Air in fuel system - Bleed fuel system |
| Spark plug wiring connection is damaged - Check spark plug wiring connection, repair or change |
| Faulty spark plug - Replace spark plug |
| Fuel filter is dirty - Fuel filter needs changing |
| Defective safety switch - Replace if required |
| Carburetor malfunction - Check and repair as required |
| Engine has bad compression - Check cylinder block and change wear parts |
| Throttle cable is adjusted incorrectly or damaged - Adjust properly or change the cable |
| Cooling fins are plugged - Clean and wash as required |
| Ignition system is defective - Test ignition and replace failed parts |
| Throttle cable is faulty or stuck - Clean or change the cable |
| Air filter is dirty - Clean or change air filter |
| Fuel pump is faulty or clogged - Test fuel pump and replace if necessary |
| Engine starts but immediately stops |
| Spark plug is damaged - Change spark plug |
| Clogged or faulty carburetor - Clean or replace carburetor |
| Defective ignition coil - Change ignition coil as required |
| Valve springs are weak or broken - New valve springs need to be installed |
| Valves sticking - Valves must be cleaned |
| Engine oil insufficient - Check oil level and add oil as required |
| Engine is under excessive load - Load reducing required |
| Air intake screen is plugged - Need to clean or wash |
| Carburetor mixture is too lean - Adjust carburetor correctly |
| Improper ignition timing - Adjust ignition timing correctly |
| Incorrect valve setting - Set the valves correctly |
| Abnormal engine noise or knocking |
| Stale fuel - Change gasoline |
| Engine overload - Load reducing required |
| Engine oil insufficient - Check oil level and add oil as required |
| Low idle speed setting is incorrect - Need to adjust idle speed |
| Clogged or defective fuel pump - Inspect fuel pump and change as required |
| Crankshaft or main bearings failure - Need to install new components |
| Improper valve clearance - Adjustment procedure required |
| Damaged cylinder bore or piston rings - Replace faulty components |
| Improperly or clogged carburetor - Service or correctly adjust carburetor |
| Air filter element is plugged - Replace or service air filter |
| Fuel pump is faulty or clogged - Clean or change fuel pump |
| Ignition failure - Inspect ignition system and change faulty parts |
| Cylinder head gasket is worn - Change cylinder head gasket |
| Burned or stuck valves - Clean or replace valves |
| Push rod is damaged or worn - Change push rod |
| Cylinder block components are faulty - Replace defective parts |
| Engine uses too much fuel |
| Choke did not open fully - Change or adjust choke cable |
| Improper adjustment of carburetor main jet - Adjust main jet as required |
| Spark plug is loose or defective - Re-tighten or replace spark plug |
| Stuck, burned, or worn valves - Replace or service valves |
| Worn piston, rings, or sleeve - Change defective parts |
| Valve clearance is not correct - Check and adjust |
| Engine using too much oil |
| Gaskets or seals can be faulty - Replace to repair leaks |
| Valve guides and stems are worn - Replace the valves |
| Piston rings are seized or worn - Replace piston rings |
| Cylinder liner or piston is damaged - Check piston and liner, install new parts as required |
| Breather hose or pipe is plugged - Replace or service |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission makes excessive noise |
| Worn or out of adjustment speed control linkage - Adjust or replace linkage |
| Transmission overloaded - Reduce loading |
| Insufficient oil level or contaminated oil - Change transmission oil or top up to proper level |
| Worn or defective transmission components - Check internal transmission parts for damage or wear and replace if required |
| Corroded or worn shift linkage - Lubricate or change linkage |
| Defective or stuck hydrostatic pump - Repair or change pump |
| Transmission shift control components are defective or misadjusted - Replace or adjust as required |
| Low oil level - Fill the transmission housing to proper oil level |
| Drive pulley is worn or faulty - Change pulley |
| Unadjusted or broken shift linkage - Adjust correctly or change linkage |
| Speed control pedal linkage is damaged or out of adjustment - Repair or adjust linkage |
| Damaged transmission seals or gaskets - Replace seals or gaskets |
| Leaking final drive shaft - Shaft seals need to be changed |
| Transmission case is cracked - Change broken case |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Damaged or clogged mower drive pulley - Service or change pulley |
| Defective or loose drive belt - Install a new belt or adjust belt tension |
| Unbalanced or warped mower blades - Change or balance blades |
| Loose blade mounting bolts - Bolts should be tightened |
| Discharge chute keeps clogging |
| Ground speed is too fast - Select a slower speed |
| Tall grass - Use a lower cutting height |
| Reduced engine speeds - Choke is not fully opening |
| Mower cuts too low - Need to set high cutting height |
| Mower drive belt installation is improper - Reinstall drive belt properly |
| Cutting deck clogging - Mower deck needs to be cleaned |
| Not sharp blades - Need a blade sharpening |
| Worn or defective blades - Replace the blades |
| High ground speed - Operate at slower speed |
| Low cutting height - Must be set to high cutting height |
| Filled bagger - Empty the bagger |
| Lawn is not level or bumpy - Lawn leveling required |
| Cutting height is too low - Use a higher cutting height |
| Mowing speed is too high - Need to slow down |
| Incorrect level of mower deck - Level the deck properly |
| Blades are worn or bent - Replace the blades |
| Tire pressure is too low - Correct tire pressure |
| Incorrect tire pressure - Inflate tires as required |
| Mower deck is not leveled properly - Adjust mower deck level properly |
| Blades are excessively dull - Sharpen the blades |
| Damaged or worn blades - Blades need to be replaced |
| Discharge area is clogged - Inspect and clean cutting deck |
| Deck shell is broken - Replace or rebuild mower deck |
| Loose or defective mower spindle - Change or repair the spindle |
| Electrical Troubleshooting |
| Battery will not charge |
| Corroded or loose wire connections - Tighten or clean connections |
| Battery terminal clamps are faulty - Terminal clamps should be changed |
| Worn-out battery - Replace the battery |
| Low battery output voltage - Recharge the battery |
| Battery will not hold charge - Service charging system or install new battery |
| Terminals are faulty or battery cables are disconnected - Check wire connections and change or service terminals |
| Battery is low or faulty - Recharge or replace battery |
| Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required |
| Battery voltage is low - Charge the battery |
| Incorrectly gapped or worn spark plug - Replace or clean and gap |
| Starter motor or solenoid is defective - Replace solenoid or repair starter |
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| Lawn and Garden Tractors Technical Specs |
