Yanmar EF312T - User Manual

Questions and Answers

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Jill ChapmanAug 19, 2025
Why is my Yanmar EF312T engine hard to start?
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  Sandra LamAug 20, 2025
  Your Yanmar Tractor engine might be hard to start due to several reasons: * No fuel or improper fuel. If this is the case, fill the fuel tank or drain the wrong fuel and fill it with the proper fuel. * Water, dirt, or air in the fuel system. In this situation, drain, flush, and bleed the fuel system. * Clogged fuel filter. You should clean or replace the fuel filter. * Fuel shut-off valve closed. Open the fuel shut-off valve. * Accelerator lever not pulled. Pull the throttle lever. * Engine oil too heavy. Use oil of proper viscosity. * Starter motor doesn’t run. Set the lever to neutral. * PTO shift lever is not set to 'N'. Set the lever to neutral. * Low voltage. Charge the battery. * Slow blow fuse blown. Replace the slow blow fuse.
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Sheri GreenAug 22, 2025
What to do if my Yanmar EF312T engine overheats?
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  Marvin SmithAug 22, 2025
  If your Yanmar Tractor engine overheats: * Reduce the load or shift to a lower gear if the engine is overloaded. * Fill the coolant and check the cooling system for loose connections or leaks if the coolant level is low. * Adjust the fan belt and replace it if needed if the fan belt is loose or defective. * Clean the radiator screen or fins if they are clogged. * Flush the cooling system if it needs flushing. * Remove and check the thermostat if it is defective.
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baileyflemingAug 25, 2025
What causes lack of engine power in my Yanmar EF312T Tractor?
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  Keith SmithAug 25, 2025
  A lack of engine power in your Yanmar Tractor can stem from several causes: * The engine may be overloaded. Try reducing the load or shifting to a lower gear. * The air cleaner element could be clogged. Clean the air cleaner element. * The fuel filter might be clogged. Clean or replace the fuel filter. * You might be using the wrong type of fuel. Use the proper fuel. * The engine may be overheating. Consult the section on 'Engine overheats'. * The ballast may be improper. Adjust the ballast to the load. * The hydraulic stop valve could be closed. Open the stop valve. * An improper implement might be mounted. Check the required horsepower for the implement.
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qmckeeAug 26, 2025
Why does my Yanmar EF312T engine run irregularly or stall frequently?
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  Sarah HessAug 27, 2025
  Your Yanmar Tractor engine may run irregularly or stall frequently due to: * A clogged vent in the fuel tank cap. Clean the cap in solvent and blow it dry. * A clogged fuel filter. Clean or replace the fuel filter. * Water, dirt, or air in the fuel system. Drain, flush, and bleed the fuel system. * Using an improper type of fuel. Use the proper fuel. * Insufficient oil. Add oil.
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Jasmin RobertsonAug 28, 2025
What causes high fuel consumption in my Yanmar Tractor?
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  Donna BlevinsAug 28, 2025
  High fuel consumption in your Yanmar Tractor may be due to: * Using an improper type of fuel. Switch to the proper fuel. * An overloaded engine. Reduce the load or shift to a lower gear. * A clogged air cleaner. Clean the air cleaner and element. * A clogged crankcase breather. Clean the breather pipe. * Clogged radiator screen or fins. Clean the radiator screen or fins. * An improperly mounted implement. Check the required horsepower for the implement. * Tire pressure being too low. Inflate the tires to the proper pressure. * Clutch slipping. Adjust the clutch free travel or replace the disk.
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pricejenniferAug 29, 2025
Why does my Yanmar EF312T Tractor engine emit black or gray smoke?
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  jennifer66Aug 29, 2025
  Your Yanmar Tractor engine may emit black or gray smoke because: * You are using an improper type of fuel. Use the proper fuel. * The engine is overloaded. Reduce the load or shift to a lower gear. * The air cleaner is clogged. Clean or replace the air cleaner element.
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Billy MckeeAug 31, 2025
Why does my Yanmar EF312T engine emit white smoke?
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  Carlos CookAug 31, 2025
  Your Yanmar Tractor engine may emit white smoke due to: * Using an improper type of fuel. Ensure you are using the proper fuel. * Low engine temperature. Warm up the engine to its normal operating temperature.
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stevensmithSep 3, 2025
Why is my Yanmar Tractor battery not charged?
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  Megan ArmstrongSep 3, 2025
  If your Yanmar Tractor battery is not charging, it could be due to: * Loose or corroded connections. Clean and tighten the connections. * The battery's service life is ending. Check the electrolyte level and specific gravity, and replace the battery if necessary. * A loose or defective fan belt. Adjust the belt tension or replace the belt. * Excessive engine idling. Allow the engine to idle only when necessary.
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Tristan DudleySep 5, 2025
Why does my Yanmar EF312T Tractor implement not raise?
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  Kenneth Nelson MDSep 5, 2025
  If the implement on your Yanmar Tractor is not raising, consider these possible causes: * Low oil level. Fill the system with the proper oil. * Hydraulic stop valve closed. Open the stop valve. * Excessive load on the hitch. Reduce the load. * Hydraulic oil too cold. Allow the oil to warm up. * Hydraulic oil filter clogged. Replace the filter. * Oil leaks. Check for oil leaks.
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patrickmillerSep 6, 2025
Why does my Yanmar Tractor engine knock?
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  donald35Sep 7, 2025
  Your Yanmar Tractor engine may be knocking due to: * Low coolant temperature. Remove and check the glow plug. * Engine overheating. See 'Engine overheats'. * Idle speed being too slow. Check the idle speed. * Using an improper type of fuel. Use the proper fuel.

Yanmar EF312T Specifications

General

Engine Type	Diesel
Engine Cylinders	3
Engine Cooling	Liquid
Drive	4WD
Tire Size (Rear)	11.2-24
Operating Weight	1, 565 lbs (710 kg)
Fuel Tank Capacity	25 L
Length	2, 920 mm