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John Deere GT235 Troubleshooting
The
John Deere GT235 is a GT200 series garden tractor. This model was manufactured
from 1999 to 2005.
The John Deere GT235 powerline components: Kawasaki FH580V vertical
V-twin cylinder air cooled gasoline engine or Briggs and Stratton 350777
Vanguard vertical shaft V-twin cylinder air-cooled gasoline engine, and
Tuff Torq K71 belt-driven hydrostatic transmission. The Kawasaki engine
has a cylinder bore of 2.92" (74 mm), piston stroke of 2.69" (68 mm),
and rated power of 17 hp (12.7 kW).
The Briggs engine has a cylinder bore of 2.83" (72 mm), piston stroke of
2.75" (70 mm), and rated power of 18 hp (13.3 kW). The maximum forward
speed - 7 mph (11.3 kph), max. reverse speed - 4 mph (6.4 kph). The
tractor is equipped with 16x6.50-8 front tires and 23x10.50-12 rear
tires. The wheelbase is 49" (1240 mm).
Compatible attachments for John Deere GT235: a 48" mid-mount 3-blade
mower deck with cutting height of 1-4" (25-102 mm) and electric blade
engagement, 42" front-mount single-stage snowblower with clearing height
of 16" (405 mm), 46" front blade with mechanical lifting system, and 30"
rear-mount mechanical tiller.
| Engine Troubleshooting |
| Engine won't start or starts hard |
| Empty fuel tank - Fill it up |
| Wrong grade of gasoline - Change fuel |
| Air in fuel system - Bleed fuel system |
| Spark plug wire connection are damaged - Inspect spark plug wiring connection, change or repair |
| Defective spark plug - Install new spark plug |
| Fuel filter is clogged - Fuel filter needs changing |
| Safety contact for brake pedal defective - Install new part |
| Problems with carburetor adjustment - Adjust as required |
| Engine has low compression - Check cylinder block and replace defective parts |
| Choke cable is unadjusted or damaged - Change 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 |
| Choke cable is defective or stuck - Change or clean the cable |
| Plugged air filter - Service or replace air filter |
| Fuel pump is faulty or clogged - Check fuel pump and replace if necessary |
| Engine starts but immediately shuts off |
| Spark plug is defective - Install new spark plug |
| Carburetor is dirty or faulty - Replace or service carburetor |
| Ignition coil is damaged - Ignition coil must be replaced |
| Valve springs are damaged or weak - Replace valve springs |
| Valves sticking - Clean the valves |
| Not enough engine oil - Fill the crankcase with engine oil |
| Engine overloaded - Reduce engine load |
| Clogged cooling fins - Need to wash or clean |
| Carburetor fuel mixture is too lean - Adjust carburetor properly |
| Incorrect ignition timing - Ignition timing needs to be set properly |
| Wrong valve setting - Set the valves properly |
| Abnormal engine knocking or noise |
| Stale gasoline - Use correct gasoline |
| Engine overload - Load reducing is recommended |
| Engine oil level is low - Fill the crankcase with engine oil |
| Incorrect low idle setting - Correct idle adjustment |
| Fuel pump is faulty or clogged - Service or change fuel pump |
| Main bearings or crankshaft wear - Install new parts as as required |
| Valve clearance is wrong - Check and adjust |
| Damaged cylinder bore or piston rings - Change defective parts |
| Carburetor is improperly adjusted or dirty - Adjust carburetor properly or service it |
| Air filter is dirty - Clean or replace air filter |
| Fuel pump is clogged or faulty - Check fuel pump and change if required |
| Defective ignition system - Test ignition and replace failed parts |
| Worn cylinder head gasket - Cylinder-head gasket replacement required |
| Valves are burned or stuck - Clean or change valves |
| Worn or damaged push rod - Replace push rod |
| Cylinder block components are worn - Change defective components |
| Excessive fuel consumption |
| Throttle did not open fully - Replace or adjust throttle cable |
| Carburetor main jet is improperly adjusted - Adjust the carburetor main jet correctly |
| Loose or faulty spark plug - Tighten or replace spark plug |
| Valves are stuck, worn, or burned - Service or replace valves |
| Sleeve, piston, or rings are damaged - Change defective components |
| Valve clearance is incorrect - Adjust to proper valve clearance |
| Engine consuming too much oil |
| Gaskets or seals can be faulty - Replace defective parts |
| Valve stems and guides are worn - Valves replacement required |
| Piston rings are stuck or broken - Have piston rings replaced |
| Cylinder liner or piston is scuffed - Check liner and piston, install new components as required |
| Breather pipe or hose is clogged - Clean or change |
| Hydrostatic Transmission Troubleshooting |
| HST transmission is making noise |
| Worn or out of adjustment speed control linkage - Adjust or install new linkage |
| Excessive transmission load - The load should be reduced |
| Oil is dirty or oil level is too low - Fill to required level or change the transmission oil |
| Worn or defective parts of transmission - Check internal transmission parts and replace if required |
| Damaged or loose shift linkage - Change or repair linkage |
| Seized or worn hydrostatic pump - Replace or repair pump |
| Defective or unadjusted transmission shift control components - Adjust properly or change |
| Insufficient transmission fluid - Need to add transmission fluid |
| Drive pulley is damaged or worn - Replace pulley |
| Unadjusted or broken shift linkage - Change or adjust linkage |
| Worn or out of adjustment speed control linkage - Replace or adjust linkage |
| Damaged transmission seals or gaskets - Install new gaskets or seals |
| Leaking final drive shaft - Change shaft seals |
| Transmission case is cracked - Change broken case |
| Mower Deck Troubleshooting |
| Mower vibration is excessive |
| Drive pulley of mower deck is damaged or dirty - Clean or replace pulley |
| Drive belt is damaged or loose - Change belt or adjust belt tension |
| Warped or not balanced mower blades - Balance or replace blades |
| Blade mounting bolts are loose - Bolts should be tightened |
| Discharge chute keeps clogging |
| Fast mowing speed - Select a slower speed |
| Long grass - Must be set to low cutting height |
| Low engine speeds - Throttle is not fully open |
| Cutting level is too low - Change cutting height adjustment |
| Incorrect mower drive belt installation - Drive belt must be installed correctly |
| Lawn mower leaving uncut grass |
| Deck is plugged with grass - Check cutting deck and clean as necessary |
| Excessive blade dullness - Blades need to be sharpened |
| Defective or worn blades - Blades must be changed |
| Fast mowing speed - Operate at slower speed |
| Mower cuts too low - Need to set high cutting height |
| Grass bag is full - Empty the grass bag |
| Lawn is uneven or bumpy - Roll or level the lawn |
| Mower deck cutting height is set too low - Change cutting height adjustment |
| High ground speed - Need to slow down |
| Mower deck is not leveled properly - Deck needs to be adjusted properly |
| Bent or worn blades - Install new blades |
| Tires are not properly inflated - Correct tire pressure |
| Tire pressure is too low - Need to inflate tires |
| Deck is not leveled correctly - Level the deck properly |
| Blades are too dull - Need to sharpen the blades |
| Blades are worn or damaged - Install new blades |
| Clogged mower deck - Mower deck needs to be cleaned |
| Damaged mower deck shell - Rebuild or replace mower deck |
| Loose or faulty mower spindle - Spindle needs to be repaired or replaced |
| Electrical Troubleshooting |
| Battery cannot be charged |
| Corroded or loose wire connections - Clean or tighten connections |
| Defective battery terminal connectors - Terminal connectors should be replaced |
| Battery is defective - Battery replacement required |
| Low battery output voltage - Battery is drained, charge it |
| Battery is not holding charge - Service charging system or replace battery |
| Faulty battery terminals or disconnected cables - Connect wiring correctly or install new terminals |
| Battery is discharged or worn - Need to charge or replace the battery |
| Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly |
| Low battery output - Recharge the battery |
| Improperly gapped or dirty spark plug - Replace or clean and gap |
| Starter motor or solenoid is defective - Starter/solenoid should be replaced |
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| Lawn and Garden Tractors Technical Specs |
