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Kubota G1800 Troubleshooting
The
Kubota G1800 is a G-series garden tractor. This model was manufactured from 1989
to 2000. The G1800 driveline system components: Kubota D662 four-cycle vertical
three cylinder diesel engine and shaft-driven hydrostatic transmission.
The max. forward speed - 8.1 mph (13 kph), a maximum reverse speed - 3.7
mph (6 kph). A 40.1 cu.in (0.66 L) engine output rating is 19.2 hp (14.3
kW) at 3800 rev/min. The compression ratio rating is 23:1. The Kubota
G1800 garden tractor was equipped with 16x6.50-8 front tires and
23x8.50-12 rear tires.
The wheelbase is 50 inches (1270 mm). The tractor is compatible with the
following attachments: a 48" mid-mount mower deck with cutting height of
1.4-3.5 in (35-80 mm), 54" mid-mount mower deck with cutting height of
1.5-4.0 in (38-102 mm), and 48" front blade.
| Diesel Engine Troubleshooting |
| Engine won't start or starts hard |
| Dirty fuel filter element - Change filter element |
| No fuel supply from the tank - Open the fuel supply valve |
| Air in fuel pipes - Bleed fuel pipes |
| Fuel injectors are defective or dirty - Check fuel injectors and replace if required |
| Fuel injection pump is defective - Change or repair the pump |
| Engine has bad compression - Check and change damaged parts |
| Engine stops during operation |
| Engine not warmed up - Warm up the engine to required temperature |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Improper fuel injection - Fuel injection settings required |
| Fuel filter is clogged - Change the filter element |
| Fuel injectors are defective or dirty - Service or change fuel injectors |
| Engine starts and immediately stalls |
| Timing of fuel injection pump is not adjusted - Correct injection timing |
| Plugged fuel filter - Clean the filter element |
| Fuel injector nozzles are damaged or dirty - Install a new set of well-balanced nozzles |
| Faulty fuel injection pump - Replacement or repair required |
| Dirty air cleaner - Clean or replace the air cleaner element |
| Engine stalls when idling |
| Wrong adjustment of low idle speed - Correct low idle settings |
| Fuel injection pump is not working correctly - Repair or replace injection pump |
| Fuel injector nozzles are clogged or faulty - Change or clean injector nozzles |
| Valve clearance is not correct - Have it adjusted |
| Insufficient coolant - Add the coolant. Check radiator and hoses for leaks |
| Cooling system is clogged or cooling parts are defective - Replace faulty parts or service cooling system |
| Insufficient engine oil - Check and refill engine oil |
| Fan belt is worn or belt tension is improper - Change or adjust belt tension correctly |
| Thermostat is defective - Test thermostat opening temperature, replace as required |
| Clogged fuel injectors - Service or change fuel injectors |
| Incorrect fuel injection pressure - Adjust to proper pressure |
| Air filter element is dirty - Replace or service air filter element |
| Clogged oil filter - Replace or clean engine oil filter element |
| Engine overload - Shift to lower gear or reduce the load |
| Valve clearance is out of adjustment - Need to adjust valve clearance |
| Incorrect low idle speed adjustment - Adjust as required |
| Restricted fuel pipes or hoses - Service fuel pipes and hoses |
| Engine losing compression: Intake or exhaust valves are damaged - Valves need to be replaced |
| Fuel injection pump timing is incorrect - Repair or replace fuel injection pump |
| Damaged or clogged injector nozzles - Change or clean injector nozzles |
| Not enough engine oil - Fill up the engine oil |
| Engine not warmed up - Warm up engine as required |
| Crankshaft or main bearings failure - Change defective components as required |
| Stuck or worn piston rings - Replace piston rings |
| The flywheel to crankshaft bolts are loose - Tighten bolts as required |
| Diesel engine consuming too much oil |
| Oil leaks: Seals or gaskets are defective - Replace worn parts to avoid leaks |
| Oil viscosity is wrong - Use oil of proper viscosity |
| Damaged or seized piston rings - Piston rings need to be replaced |
| Damaged valve guides or valve stems - Replace the valves |
| Damaged cylinder liners or pistons - Check pistons and liners, install new parts as required |
| Hydrostatic Transmission Troubleshooting |
| HST transmission makes noise |
| Worn or unadjusted speed control linkage - Adjust or repair linkage |
| Excessive transmission load - Reduce transmission load |
| Dirty transmission fluid or insufficient fluid level - Add fluid to the correct level or fill transmission with fresh fluid |
| Transmission components are damaged or worn - Replace or repair defective components |
| Shift linkage is rusty or worn - Lubricate or replace the linkage |
| Blocked or faulty hydrostatic pump - Repair or replace pump |
| Transmission shift control components are worn or unadjusted - Adjust properly or change |
| Transmission fluid insufficient - Check and refill the transmission fluid |
| Drive sheave is defective or worn - Install a new sheave |
| Shifter linkage is faulty or not adjusted - Adjust correctly or replace linkage |
| Defective or not adjusted speed control pedal linkage - Adjust or repair linkage |
| Transmission gaskets or seals are worn - Replace seals or gaskets |
| Final drive shaft leakage - Install new shaft seals |
| Transmission case is cracked - Change broken case |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Mower deck drive sheave is clogged or worn - Replace or service sheave |
| Loose or worn drive belt - Install a new belt or adjust belt tension |
| Cutting blades are not balanced or warped - Balance or replace blades |
| Blade bolts are not tightened well - Bolts need to be tightened |
| Constant clogging of discharge chute |
| Fast ground speed - Select a slower speed |
| Grass is too long - Must be set to low cutting height |
| Low engine speeds - Adjust carburetor to higher rpm |
| Cutting height is too low - Adjust mower to higher cutting height |
| Mower drive belt installation is improper - Check drive belt for correct installation |
| Clogged mower deck - Need to clean the mower deck |
| Blades are not sharp - Sharpen the blades |
| Damaged or worn blades - Blades must be changed |
| High mowing speed - Need to slow down |
| Mower cuts too low - Change cutting height adjustment |
| Filled grass bag - Clean grass bag |
| Uneven or bumpy lawn - Level the lawn |
| Cutting height is too low - Raise the cutting height |
| High mowing speed - Select a lower speed |
| Deck is not leveled correctly - Adjust the level of mower deck correctly |
| Blades are bent or worn - Install new blades |
| Low tire pressure - Need to inflate tires |
| Incorrect tire pressure - Inflate tires as required |
| Incorrect level of mower deck - Deck needs to be adjusted properly |
| Blades are too dull - Blades need to be sharpened |
| Blades are defective or worn - Blades need to be replaced |
| Clogged mower deck - Mower deck needs to be cleaned |
| Broken mower deck shell - Replace or repair the deck |
| Mower spindle is faulty or loose - Replace or repair the spindle |
| Electrical Troubleshooting |
| Battery does not charge |
| Electrical wire connections are loose or corroded - Tighten or service connections |
| Battery terminal clamps are faulty - Change terminal clamps |
| Worn-out battery - Use a new battery |
| Starter motor cranks slow |
| Low battery output voltage - Recharge the battery |
| Battery does not hold charge - Battery needs service or replacement |
| Wires are disconnected or battery terminals are corroded - Check cables and clean or change terminals |
| Battery is drained or defective - Charge or change the battery |
| Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly |
| Low battery power - Battery is drained, recharge it |
| Incorrectly gapped or worn spark plug - Clean, gap or replace spark plug |
| Solenoid or starter motor failure - Change solenoid or repair starter |
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| Lawn and Garden Tractors Technical Specs |
