________________________________________________________________________________________
Husqvarna CTH135 Troubleshooting
The
Husqvarna CTH 135 lawn tractor was manufactured between 2002 and 2003. The
components of Husqvarna CTH135 powerline system: a 30.5 cu.in (500 cc) Briggs
and Stratton 31G777 Intek 4-cycle single cylinder OHV vertical shaft air-cooled
gasoline engine with a rated power of 17.5 hp (13 kW), and Hydro-Gear 321-0510
belt-driven hydrostatic transmission with infinite forward and reverse gears.
The engine has a float-feed carburetor, pulse type fuel pump,
lubrication with oil pump and filter, and air cleaner with dual element.
The maximum travel speed (forward/reverse): 5 mph (8 km/h) and 2.4 mph
(3.8 km/h). The Husqvarna CTH 135 is equipped with a manual steering
system, disc brakes, 15x6.00-6 front tires, and 18x8.50-8 rear tires.
The wheelbase is 46.9" (1190 mm).
The tractor is compatible with a 36" mid-mount 2-blade side discharge
mower deck with cutting height of 1.5-4.0 in (38-102 mm), 6 cut
positions, manual blade engagement, and mechanical lift system.
| Engine Troubleshooting |
| Engine doesn't start or starts hard |
| Empty fuel tank - Fill gasoline up |
| Low-quality gasoline - Use quality gasoline |
| There is air in the fuel system - Bleed the system |
| Spark plug wire is disconnected or loose - Inspect spark plug wiring connection, change or repair |
| Spark plug is faulty - Install new spark plug |
| Clogged fuel filter - Change fuel filter |
| Safety contact for brake pedal defective - Install new part |
| Carburetor is not adjusted - Check carburetor float adjustment |
| Engine has low compression - Check cylinder block and replace defective parts |
| Not adjusted or damaged throttle cable - Replace cable or adjust correctly |
| Engine runs intermittently |
| Air intake screen is plugged - Wash or clean as required |
| Ignition system problems - Inspect ignition system and change failed components |
| Throttle cable is stuck or defective - Change or clean the cable |
| Plugged air filter - Replace or service air filter |
| Fuel pump is defective or dirty - Clean or install new fuel pump |
| Engine starts and then stalls |
| Damaged spark plug - Spark plug need to be replaced |
| Faulty or clogged carburetor - Service or change carburetor |
| Ignition coil is defective - Change ignition coil as required |
| Broken or loose valve springs - New valve springs need to be installed |
| Stuck valves - Valves need to be cleaned |
| Engine oil level is low - Need to add engine oil |
| Engine is under excessive load - Reduce engine load |
| Cooling fins are clogged - Clean and wash as required |
| Carburetor is running lean - Set the carburetor properly |
| Improper ignition timing - Adjust ignition timing as required |
| Valve setting is improper - Set the valves properly |
| Abnormal engine noise or knocking |
| Stale fuel - Change gasoline |
| Engine overloaded - Reduce engine load |
| Engine oil insufficient - Check and refill engine oil |
| Incorrectly adjusted low idle speed - Correct the settings |
| Clogged or damaged fuel pump - Service or change fuel pump |
| Worn main bearings or crankshaft - Repair or replace defective parts |
| Valve clearance is incorrect - Need to adjust valve clearance |
| Piston rings or cylinder bore are damaged - Replace defective parts |
| Dirty or improperly adjusted carburetor - Service or properly adjust carburetor |
| Air filter element is plugged - Service or change air filter |
| Fuel pump is clogged or faulty - Clean or replace fuel pump |
| Ignition system malfunction - Inspect ignition system and change failed components |
| Cylinder head gasket is worn - Install new head gasket |
| Valves are stuck or burned - Service or replace valves |
| Push rod is worn or damaged - Replace push rod |
| Cylinder block components are faulty - Replace defective parts as required |
| Engine uses too much fuel |
| Choke doesn't open well - Adjust or replace choke cable |
| Incorrect adjustment of carburetor main jet - Adjust the carburetor main jet correctly |
| Spark plug is loose or faulty - Tighten or replace spark plug |
| Worn, stuck, or burned valves - Clean or change valves |
| Sleeve, piston, or rings are damaged - Replace faulty parts as required |
| Incorrect valve clearance - Adjust valve clearance according to specifications |
| Engine consuming too much oil |
| Defective seals or gaskets - New components need to be installed |
| Valve stems and guides are worn - Valves replacement required |
| Piston rings are stuck or broken - Change piston rings |
| Worn cylinder liner or piston - Inspect liner and piston, replace as necessary |
| Clogged breather pipe or hose - Change or service |
| Hydrostatic Transmission Troubleshooting |
| HST transmission makes excessive noise |
| Speed control linkage is worn or unadjusted - Replace or adjust linkage |
| Transmission overload - The load should be reduced |
| Dirty transmission fluid or insufficient fluid level - Add fluid to the correct level or fill the transmission with fresh fluid |
| Transmission parts are worm or defective - After disassembling and inspection, change defective components |
| Shift linkage is damaged or loose - Replace or service the linkage |
| Hydrostatic pump is defective or blocked - Replace or repair pump |
| Worn or misadjusted transmission shift control parts - Adjust correctly or replace |
| Insufficient transmission oil - Fill the transmission housing with oil |
| Worn or damaged drive sheave - Change sheave |
| Misadjusted or faulty shifting linkage - Adjust correctly or change linkage |
| Defective or not adjusted speed control pedal linkage - Adjust or install new linkage |
| Transmission seals or gaskets are broken - Seals and gaskets need to be replaced |
| Final drive shaft is leaking - Install new shaft seals |
| Transmission case is cracked - Replace case or transmission assembly |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Mower deck drive sheave is clogged or worn - Clean or replace sheave |
| Loose or defective drive belt - Adjust belt tension or replace belt |
| Mower blades are bent or out of balance - Balance or replace blades |
| Loose blade mounting bolts - Tighten it fast |
| Discharge chute regular clogging |
| High mowing speed - Operate at slower speed |
| Grass is too high - Use a lower cutting height |
| Engine runs at low revs - Choke is not fully opening |
| Low cutting height - Use a higher cutting height |
| Incorrect mower drive belt installation - Check drive belt for correct installation |
| Cutting deck is clogged - Check cutting deck and clean as necessary |
| Blades are excessively dull - Blades need to be sharpened |
| Worn or damaged blades - Install new blades |
| Ground speed is too fast - Use a lower speed |
| Cutting level is too low - Use a higher cutting height |
| Filled grass bag - Remove grass from bag |
| Lawn is bumpy or not smooth - Lawn needs to be leveled |
| Mower deck cutting height is set too low - Use correct cutting height |
| Fast ground speed - Operate at slower speed |
| Deck is not leveled correctly - Deck should be adjusted correctly |
| Blades are worn or bent - Blades need to be replaced |
| Tires are not correctly inflated - Inflate tires correctly |
| Tire pressure is too low - Need to inflate tires |
| Improperly leveled mower deck - Adjust mower deck level properly |
| Not sharp blades - Need a blade sharpening |
| Worn or defective blades - Install new blades |
| Clogged mower deck - Mower deck needs to be cleaned |
| Deck housing is broken - Repair or replace the deck |
| Loose or defective mower spindle - Install new spindle or repair it |
| Electrical Troubleshooting |
| Battery won’t charge |
| Corroded or loose electrical wire connections - Clean or tighten wiring connections |
| Battery terminal connectors are faulty - Terminal connectors need to be changed |
| Dead cell in battery - Install a new battery |
| Low battery power - Low battery charging, charge as required |
| Battery runs out quickly - Battery needs service or replacement |
| Disconnected wiring or bad battery terminals - Connect wires properly or change terminals |
| Starter motor is not working |
| Battery is drained or defective - Charge or replace the battery |
| Battery wires are disconnected or incorrectly connected - Check wires and connect correctly |
| Low battery output - Battery is drained, charge it |
| Spark plug gapped improperly or faulty - Clean and gap or replace |
| Damaged starter motor or solenoid - Repair starter or change solenoid |
________________________________________________________________________________________
________________________________________________________________________________________
| Lawn and Garden Tractors Technical Specs |
