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Kubota GR2000 Troubleshooting

The Kubota GR2000 is a 4-wheel drive garden tractor. This model was manufactured from 2005 to 2007. The components of Kubota GR2000 driveline system: 38.1 cu.in (0.62 L) Kubota GH630 four cycle 2-cylinder air-cooled gasoline engine with max power of 20 hp (14.8 kW), and hydrostatic transmission with infinite forward and reverse gears.

Max. forward speed - 6.2 mph (10 kph), maximum reverse speed - 3.1 mph (5 kph). The Kubota GR2000 was equipped with a hydrostatic power steering, internal expanding brakes, 16x6.50-8 front tires, and 23x10.5-12 rear tires.

The wheelbase is 50.4 inches (1280 mm). The tractor is compatible with a 48" mid-mount 3-blade Kubota 1219 mower deck with cutting height of 1.0-4.0 in (25-101) and hydraulic lift, 46" front-mount Kubota GR2707 snowblower, and 48" front-mount Kubota GR2705 blade.

Engine Troubleshooting
Engine will not start or starts up hard
Gas tank is empty - Fill fuel up
Low-quality gasoline - Use quality gasoline
Fuel system clogged - Repair or replace
Spark plug wiring connection is damaged - Inspect spark plug wiring connection, change or repair
Faulty spark plug - Replace spark plug
Plugged fuel filter - Fuel filter needs changing
Safety contact for brake pedal defective - Install new part
Carburetor is dirty - Wash, clean and adjust
Engine has bad compression - Check cylinder block and change wear parts
Throttle cable is adjusted improperly or worn - Adjust correctly or change the cable
Irregular engine running
Cooling fins are clogged - Need to wash or clean
Ignition failure - Inspect ignition system and change faulty parts
Stuck or defective throttle cable - Replace or clean the cable
Clogged air filter - Change or service air filter
Clogged or defective fuel pump - Check fuel pump and change if required
Engine starts but then stalls
Defective spark plug - Install new spark plug
Carburetor is dirty or faulty - Clean or install new carburetor
Ignition coil is faulty - Ignition coil should be replaced
Broken or loose valve springs - Replace valve springs
Stuck valves - Clean the valves
Engine overheating
Engine oil level low - Fill the crankcase with engine oil
Engine overload - Load reducing required
Air intake grill is clogged - Wash or clean as required
Too lean carburetor mixture - Make the correct settings
Ignition timing is wrong - Ignition timing needs to be adjusted correctly
Wrong valve setting - Valves needs to be set correctly
Engine noises or knocks
Low octane fuel - Use proper gasoline
Engine is running overloaded - Reduce the load
Not enough engine oil - Checking oil level and add if necessary
Low idle speed adjustment is incorrect - Adjust idling as required
Dirty or defective fuel pump - Test fuel pump and replace if necessary
Worn crankshaft or main bearings - Repair or replace defective parts
Incorrect valve clearance - Adjust to proper valve clearance
Piston rings or cylinder bore are damaged - Change defective components
Engine power loss
Clogged or improperly adjusted carburetor - Clean or correctly adjust carburetor
Clogged air filter - Service or replace air filter
Fuel pump is dirty or defective - Clean or replace fuel pump
Ignition system problems - Inspect ignition system and change failed components
Damaged cylinder-head gasket - Replace the gasket as required
Stuck or burned valves - Service or replace valves
Worn or damaged push rod - Push rod should be replaced
Faulty cylinder block parts - Change defective parts
Engine uses too much fuel
Throttle is not fully open - Change or adjust throttle cable
Carburetor main jet is incorrectly adjusted - Adjust it correctly
Defective or loose spark plug - Tighten or change the spark plug
Valves are stuck, burned, or worn - Replace or service valves
Sleeve, rings, or piston are damaged - Change defective components
Incorrect valve clearance - Adjust valve clearance according to specifications
Engine consuming too much oil
Gaskets or seals are excessively worn - Defective components must be replaced
Valve stems and guides are worn - Replace the valves
Stuck or worn piston rings - Replace piston rings
Cylinder liner or piston is scored - Inspect piston and liner, replace as required
Plugged breather pipe or hose - Change or service

Hydrostatic Transmission Troubleshooting
Excessive hydrostatic transmission noise
Speed control pedal linkage is bent or not adjusted - Adjust or replace linkage
Transmission overload - Reduce transmission load
Transmission oil is contaminated or oil level is insufficient - Add oil to proper level or pour fresh transmission oil
Worn or defective transmission components - Check transmission components and change if necessary
Hard to shift
Shift linkage is stuck or damaged - Clean or change linkage
Hydrostatic pump is stuck or worn - Change or repair pump
Defective or unadjusted transmission shift control components - Adjust properly or change
Power is insufficient
Low oil level - Fill the transmission housing to proper oil level
Defective or worn drive sheave - Replace sheave
Shifter linkage is not adjusted or faulty - Adjust properly or replace linkage
Worn or out of adjustment speed control linkage - Repair or adjust linkage
Transmission leaks
Broken transmission gaskets or seals - Install new seals or gaskets
Final drive shaft leakage - Install new shaft seals
Transmission housing is cracked - Install a new transmission housing

Mower Deck Troubleshooting
Mower vibrates too much
Drive pulley of mower deck is damaged or dirty - Replace or service pulley
Drive belt is defective or loose - Change belt or adjust belt tension
Mower blades are bent or out of balance - Balance or change blades
Loose blade mounting bolts - Tighten it fast
Constant clogging of discharge chute
Ground speed is too fast - Operate at slower speed
Long grass - Need to set low cutting height
Engine runs at low revs - Adjust carburetor to higher rpm
Low cutting height - Use a higher cutting height
Improper drive belt installation - Install drive belt correctly
Lawn mower leaving uncut grass
Discharge chute is plugged - Mower deck needs to be cleaned
Not sharp blades - Sharpen the blades
Worn or defective blades - Replace the blades
Fast ground speed - Operate at slower speed
Cutting level is too low - Adjust mower to higher cutting height
Filled bagger - Clean bagger
Blade scalped grass
Uneven or bumpy lawn - Lawn leveling required
Cutting level is too low - Raise the cutting height
High mowing speed - Operate at slower speed
Deck is not leveled correctly - Deck should be adjusted correctly
Blades are bent or worn - Blades need to be replaced
Tires are not correctly inflated - Inflate tires as required
Uneven cut
Low tire inflation - Check and inflate the tires
Deck is not leveled correctly - Deck should be adjusted correctly
Blades are excessively dull - Blades need to be sharpened
Bent or worn blades - Blades need to be replaced
Deck is plugged with grass - Clean out the mower deck
Deck housing is broken - Replace or repair the deck
Loose or defective mower spindle - Change or repair the spindle

Electrical Troubleshooting
Battery cannot be charged
Corroded or loose electrical wire connections - Service or tighten connections
Battery terminal connectors are defective - Change terminal connectors
Worn-out battery - Replace the battery
Starter motor turns slow
Low battery capacity - Battery is drained, charge it
Battery does not hold charge - Service or change the battery
Disconnected wires or corroded battery terminals - Connect wiring properly or install new terminals
Starter is not cranking
Battery is low or faulty - Change or recharge battery
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly
Battery voltage is low - Battery is drained, recharge it
Spark plug gapped improperly or faulty - Clean and gap or replace
Starter motor or solenoid is defective - Replace solenoid or repair starter



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