Yanmar EF312T Operator's Manual
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Yanmar EF312T Operator's Manual

Yanmar EF312T Operator's Manual

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YANMAR
DIESEL TRACTOR
EF312T/EF352T
OPERATOR'S MANUAL
OPE_EF312T&352T_en.doc

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  • Page 1 YANMAR DIESEL TRACTOR EF312T/EF352T OPERATOR’S MANUAL OPE_EF312T&352T_en.doc...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS TO THE OWNER SYMBOL INDICATION SAFETY INSTRUCTIONS AFTER SALES SERVICES TRACTOR OUTLINE PARTS NAMES LABEL LOCATIONS CONTROLS OPERATIONS 1. Pre-operation checks 2. Brake-in (initial 50 hours) 3. Before starting 4. Start and stop 4-1. Start and stop engine 4-2.

  • Page 3: To The Owner

    Keep this manual next to your machine, after you have read through it. If you lose or damage this manual, ask a new manual to YANMAR dealer right away. The parts used in this machine are subject to change to improve the quality and capacity of the machine, and for safety.

  • Page 4: Symbol Indication

    ● SYMBOL INDICATION Safety-alert Symbol (1) This is the safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the possibility of personal injury and carefully read the messages that follow. (2) This stop symbol indicates important proper operation messages in this manual.

  • Page 5: Safety Instructions

    SAFETY INSTRUCTIONS DANGER Read these instructions carefully. Important instructions for safely operating and servicing the tractor are shown. Negligence of these instructions can result in an accident and serious injury. LEARN TRACTOR AND IMPLEMENTS Do not permit anyone unfamiliar with tractor and implement operations.
  • Page 6 Extreme caution will be required when operating tractor around trees and other overhead obstructions such as guy wire or power lines. Interference between ROPS and these obstructions may cause tractor to tip over rearward. Do not modify structural members of ROPS by welding, bending, grinding or cutting.
  • Page 7 Remove oil, grease or mud from hand rails, steps, pedals, controls, and floor to avoid slippage. In winter, scrape away ice and snow on above. To attach or detach an implement, refer to the implement and tractor manufacturer’s manuals for the proper procedures.
  • Page 8 Start engine only from operator’s seat. Do not start engine while standing on ground. Before you start the engine: Sit on the operator’s seat and adjust seat positioning properly. Check ROPS is in the working condition and fastened securely. Lower an implement to ground. Place speed shift lever and PTO switch in neutral.
  • Page 9 Do not try to get on or off a moving tractor or implements. Always use hand rails or steps and face tractor when getting on and off. Never use control levers as a hand hold and never step on foot controls when getting on and off. Do not get on tractor with wet or greasy hands or muddy shoes.
  • Page 10 Do not allow the tractor to coast downhill with clutch disengaged, or with gear in neutral. When operating the tractor on slopes, set wheel tread as wide as possible for maximum stability. Reduce engine speed and avoid hard application of brakes and sharp turns.
  • Page 11 Use care when pulling loads or mounting heavy implement. Use only approved hitch points. Limit loads to that which you can safely control. Limit travel speed to that you can safety control. Do not turn too sharp. Use care when backing. Install proper ballast which is suggested in the operator’s manual.
  • Page 12 TRANSPORTING Raise all implements and place in their locked-transport position. Do not drive tractor on road with implements in motion. Couple brake pedals together at road speeds. (only for two brake pedals type) Do not make sharp turns at road speeds. Always dim headlights before meeting another vehicle.
  • Page 13 TOWING A towed load of more than the weight of the tractor should have it’s own brakes. When towing, drive slowly and avoid hills and hard applications of brake. A safety chain will help control a drawn implement, should it accidentally separate from drawbar while transporting.
  • Page 14 Take all possible precautions as follows when leaving tractor unattended: Disengage PTO and lower implement to ground. Shift all shift levers to neutral. Couple brake pedals together and set parking brake lever. Run engine to cool for 2 to 3 minutes at one-third throttle speed and no load.
  • Page 15 Unauthorized modification to tractor may impair function and/or safety, and effect tractor life. Do not use substitute parts that may not meet strength and design requirements or may not fit correctly in original tractor. Do not use repair parts not approved by YANMAR. OPE_EF312T&352T_en.doc...
  • Page 16 Remove radiator cap only when coolant temperature is cool. Wait at least one hour to allow coolant to cool down. Cover radiator cap with a cloth before opening and gradually release pressure before completely removing cap. Do not service hydraulic system when hydraulic oil is hot.
  • Page 17 Sulfuric acid in battery electrolyte is poisonous. It can destroy clothing and burn the skin. Wear eye protection and rubber gloves when filling battery. If you spill acid on yourself, flush your skin with water and apply baking soda or lime to neutralize acid, then get medical attention immediately.

  • Page 18: After Sales Services

    However, special parts will be subject to consultation. Yanmar may be able to supply (C) Engine model name & serial number a particular part after the normal supplying period.

  • Page 19: Tractor Outline

    TRACTOR OUTLINE Head light Bonnet Side light Side cover Muffler tail pipe (10) Front tire Fuel refill port (11) Rear tire Operator’s seat (12) Lower link (3-P) Turn signal lamp (13) ROPS (Safety frame, optional equipment) Sub-step OPE_EF312T&352T_en.doc...

  • Page 20: Parts Names

    PARTS NAMES (1) Main switch (8) Brake pedal (15) Head light switch (2) Accelerator lever (9) Parking brake lever (16) Horn button (3) Accelerator pedal (10) Clutch pedal (17) Flasher switch (4) Main shift lever (11) Differential lock lever (18) Side light switch (5) Range shift lever (12) Position control lever (19) Seat adjust lever...

  • Page 21: Label Locations

    Lamps and Indicators (1) Fuel gauge (5) Battery charge pilot lamp (2) Engine coolant temperature gauge (6) Engine oil pressure pilot lamp (3) Engine speed meter, RPM (7) Reverser lever neutral pilot lamp (4) Hour meter LABEL LOCATIONS Keep the safety instructions labels clean and clearly visible for your safety. If any of them are damaged or missing, replace them with new ones.

  • Page 22: Controls

    CONTROLS ENGINE Main switch The switch is used to turn on and off the engine The electric current is shut off. The engine stops. (The key can be removed.) The electric current is on. If the engine is stopped, the engine oil pressure lamp (6) and battery charge lamp (5) turn on.
  • Page 23 TRAVELLING, PTO RE RELATED FUNCTIONS Main shift lever The transmission has 4 main gear shifts. Depress the clutch pedal fully, and move the lever to desired position. (A) Main shift lever IMPORTANT Be sure the tractor stops whenever shifting. If not, it may cause damage to transmission gears.
  • Page 24 PTO shift lever The transmission has 2 PTO speeds. To change the speed, depress the clutch pedal fully. (D) PTO shift lever PTO speed at engine 2,600 rpm 1 572 rpm 2 830 rpm CAUTION Strictly maintain the PTO speed as specified by the implement.
  • Page 25 Clutch pedal The clutch pedal transmits or cuts engine power to transmission. To disengage the clutch, depress clutch pedal and engine power is disconnected. To engage the clutch after depressing clutch pedal, release the pedal slowly and engine power transmits to transmission.
  • Page 26 HYDRAULIC SYSTEM Position control lever Position control lever controls height of rear hitched an implement in a desired position. Lever stopper (B) limits lowering an implement to limit the working range of the lever, or when traveling on road. (A) Position control lever (B) Lever stopper (UP) Raise (DW) Lower...
  • Page 27 ELECTRIC SYSTEM Turn signal switch Turn signal functions when key switch turns on. Turn the turn signal switch anticlockwise to blink right side turn signal lamp and turn clockwise to blink left side lamp. (A) Turn signal switch (R) Right lamp blinks. (L) Left lamp blinks.
  • Page 28 INSTRUMENT PANEL (1) Fuel gauge (2) Engine coolant temperature gauge (3) Tachometer (4) Hour meter (5) Battery charge pilot lamp (6) Engine oil pressure pilot lamp (7) Reverser lever neutral pilot lamp (1) Fuel gauge It indicates fuel level remained in fuel tank when key switch turns on. (2) Engine coolant temperature gauge It indicates engine coolant temperature.
  • Page 29 OTHERS Seat adjust lever It adjusts the operator’s seat position in 5 steps to-and-fro. Raise the lever and slide the seat forward or backward to desired position. Lower the lever to latch the seat. (A) Seat adjust lever Opening bonnet (1) Raise the lever to open bonnet.

  • Page 30: Operations

    OPERATIONS 1. Pre-operation checks DANGER 1) Never smoke or use bare lamps/lights during oil replenishing. 2) Never fill fuel oil while the engine is running or hot. 3) After filling fuel, be sure to cover the fuel tank with screw-top and wipe off spilled fuel. If not, a fire may be caused.
  • Page 31 For safety reasons, always check the tractor before day's work. Remove any abnormalities. At least check the followings in order: (1) Abnormalities in previous day (2) Walk around the tractor to look into: • Deformed, damaged, worn or lost exposed parts •...
  • Page 32 • Clogging or dirt in air filter. • Tension or damage of cooling fan belt. • Radiator screen, grille and engine room for dust. • Hydraulic joint and lines for damages and loose connection. • Check electrical wirings for wear or damages of lead sheaths and loose connections.
  • Page 33 • Play of clutch pedal. Clutch pedal must have reasonable play (A). (15-25mm) • Play of steering wheel. Steering wheel must have reasonable play (A). (20-50mm) (5) Check hitched implement • PTO Drive shaft lock pin must be in groove of PTO output and input shafts.

  • Page 34: Brake-In (Initial 50 Hours)

    2. Brake-in (initial 50 hours) The new tractor should be carefully operated for the first 50 hours. it will surely have an effect on the lifetime and performance of the tractor throughout the life. Pay attention to the following points in particular: (1) Refrain from abrupt start or brake.

  • Page 35: Start And Stop

    4. Start and stop 4-1. Start and stop engine Start engine IMPORTANT 1) Do not keep the engine starter motor running for more than 10 seconds. If the engine does not start, keep it cool for one minute before retry. Then, execute steps (3) - (4).

  • Page 36: Start, Gear Shifting And Stop Tractor

    Stop engine (1) Push accelerator lever (A) toward (a) to decrease engine speeds. (2) Turn key switch to “OFF” position. (3) See main shift lever, range shift lever, reverser lever and PTO shift lever are in neutral positions. (A) Accelerator lever (SL) Slow speed IMPORTANT Sudden stop of hot engine may cause engine overheating.
  • Page 37 Gear shifting (1) Main shift lever Depress clutch pedal fully and shift lever to desired speed after tractor stops. (2) Range shift lever Depress clutch pedal fully and shift reverser lever to “N” after tractor stops. Keep depressing clutch pedal and shift range shift lever to desired speed.

  • Page 38: Driving On A Road

    5. Driving on a road WARNING 1) Make sure that left and right brake pedals are connected whenever traveling on a road or cross a farm ridge. One-sided braking effect will roll over the tractor or result in a sharp turn. 2) Follow the traffic regulations and rules in your place when running on a road.

  • Page 39: Driving On A Slope

    Suggested operation by working speed. Speed (km/hr) Main Range Shift Operation shift shift EF312T EF352T 1.26 1.32 1.83 1.90 Rotary 2.61 2.72 3.94 4.09 Spreader 6.58 6.85 Plow 9.88 13.60 14.14 Traveling with the trailer 20.49 21.31 (At engine speed: 2500rpm/EF312T, 2600rpm/EF352T) OPE_EF312T&352T_en.doc...

  • Page 40: Turning In A Field

    9. Turning in a field WARNING Release foot from differential lock pedal to release differential gear before turning. Otherwise, tractor cannot turn when it is required and an accident may result. (A) Differential lock pedal (OFF) Release Unlatch brake pedal connector in a field. (1) Reduce the engine speed.

  • Page 41: Loading And Unloading

    11. Loading and unloading DANGER hile loading into 1) Never steer tractor on loading bridge w or unloading from cargo truck. Drive tractor in slowest speed. If not, loss of control can result in injure or damage the tractor. 2) Never depress clutch pedal on loading bridge. Tractor may coast down and cause injury.

  • Page 42: Adjusting Wheel Tread

    12. Adjusting wheel tread Adjust the tractor rear wheel tread according to the type of crops and field preparation. Apply a wide wheel tread for works on a slope or for a traction work. (1) Apply parking brake and put tire stoppers to front wheels and jack up tractor body to raise rear wheels.

  • Page 43: Using 3-Point Hitch

    14. Using 3-point hitch 3-point rear hitch type is Category 1. Top link Adjust length of top link (A) to implement. Loosen lock nut turn turnbuckle on top link and adjust the length. Follow instructions of implements. (A) Top link (C) Lower link (B) Lift link (D) Check chain...

  • Page 44: General Precautions On Attaching And Detaching An Implement

    16. General precautions on attaching and detaching an implement WARNING 1) When moving the tractor to attach an implement, never allow a person between the tractor and the implement. Always keep the moving speed in the lowest. 2) Attach or detach an implement on a flat and leveled ground in a safe way.

  • Page 45: Power Steering

    The safety frame (ROPS, Roll Over Protect Structure) is designed to protect operator from an accident such overturn. It is suggested to install safety frame for safety operation. Please contact Yanmar tractor dealer nearby. WARNING 1) Do not modify the safety frame. Safety factor can be lost.

  • Page 46: Opening Bonnet And Side Cover

    OPENING BONNET AND SIDE COVER Bonnet Opening (1) Pull up the bonnet lever (A) to release the bonnet lock. (2) Lift the bonnet until the bonnet stand (B) is locked. Make sure the bonnet stand works properly. (A) Bonnet lever Closing (1) Lift the bonnet a little and pull bonnet stand forward.

  • Page 47: After Operation

    AFTER OPERATION 1. After operation Clean thoroughly the tractor after daily operation to keep it in good condition for a long time. In particular, clean lower and front areas before storing it. Wash the tractor with water and wipe off. Lubricate moving parts and sliding parts.
  • Page 48 (7) Depress clutch pedal and latch pedal lock. CAUTION If clutch pedal is not locked for storage, clutch disc may rust and stick to engine flywheel. Tractor may start unintentionally when start engine and may cause injury. (A) Clutch pedal (B) Clutch pedal lock (8) Put blocks or stands under tractor to take weight off tires.

  • Page 49: Periodical Service

    PERIODICAL SERVICE WARNING 1) Stop the engine before servicing. 2) Service tractor on a flat and leveled place, free from normal traffic and bystanders. 3) Fix the tractor wheels not to move. CAUTION Check periodically fuel lines and power steering hoses for damages, wearing and loose connections. If there is damage, wearing or loose, be sure to see your dealer.
  • Page 50 Fuel oil D975 (see the next chart) Engine oil API grade CD or better grade, SAE #30 or #40 Transmission and Yanmar TF-500A Transmission fluid or equivalent Hydraulic system oil Front axle Gear oil SAE #90 Grease Multipurpose type (suggested with 3-5% molybdenum disulfide) 3.
  • Page 51 5-2. Refill fuel DANGER 1) Never smoke or use a bare lamp/light during filling fuel. 2) After filling fuel, be sure to put the fuel tank cap back firmly and clean off spelled fuel. 3) Fill fuel after the engine stops and becomes cool. A fire can result.
  • Page 52 Remove drain plug on the bottom of engine crankcase. Refill new oil through the oil supply port. Select a proper type of engine oil and replace it periodically. Model Capacity Type EF312T 4.7 lit. CD or better grade SAE #30, #40 EF352T 4.7 lit.
  • Page 53 Replace EF312T 25 lit. First 50hrs and every 300 hrs. EF352T 25 lit. Use Yanmar hydraulic-transmission fluid TF-500A or equivalent. Do not mix oil with other brand. Equivalent oil Supplier Brand name (DR) Transmission oil drain plug Mobil Mobil Fluid 425...
  • Page 54 Drain plugs of front axle case are located on lower part of front axle gear case, both right and left individually. Remove both drain plugs to drain oil. Model Capacity Oil type Replace EF312T 5.0 lit. Gear oil First 50hrs and SAE #90 every 300 hrs. EF352T 5.0 lit.
  • Page 55 7. Engine coolant DANGER Never open the radiator cap when the engine is hot. Hot steam and boiled water may blow out and you may suffer sever burns. Check Open the bonnet and check water level in the sub tank water is between “FULL”...
  • Page 56 9. Radiator screen Radiator screen catches dust getting into radiator fins. If the screen is covered by dust, it causes engine over heat. Check the screen before every work. Open the bonnet and check radiator screen. Pull up sub-tank and air intake pipe. Pull up radiator screen and clean it.
  • Page 57 (2) Apply baking soda or lime to help neutralize the acid. (3) Flush your eyes with clean water for 10 - 15 minutes and get medical attention immediately. (4) If acid is swallowed, get medical attention immediately. Battery of EF312T/EF352T OPE_EF312T&352T_en.doc...
  • Page 58 (2) Tighten fixing nut. (A) Negative (ground) cable (B) Positive cable (E) Fixing nuts IMPORTANT Battery type of EF312T/EF352T 1) When connecting the battery cables, wipe oil away Model Specified battery Parts code No. from the terminal contacts. After connecting cables,...
  • Page 59 11-3. Charging battery DANGER Never charge the battery with quick charger or fast charger. Internal pressure of the battery increases and the battery may explode. It may cause serious injury. IMPORTANT Charge the battery only when the color of hydrometer is black. Charge the battery as following procedures.
  • Page 60 14. Greasing Before starting day's work, check the greasing condition at each point. Apply grease normally every 50 hours. Apply grease after every day’s work when you work in wet paddy field. (1) Tie rod end Tie rod end Left Right (2) Power steering rod Power steering rod Left...
  • Page 61 15. Adjusting brake WARNING 1) Check free play of brake pedal before every work. If brake is not work properly, accident may occur. 2) Unequal free play of left and right brake can cause abrupt turn and it may cause injury. Keep the same amount of play.
  • Page 62 17. Checking steering wheel WARNING Check free play of steering wheel. The normal free play is 20-50 mm. This tractor is equipped with hydrostatic power steering and it causes less wearing of steering system. (A) Steering wheel free play. When free play is more than normal, check wearing of Measure the free play on wheel circle.
  • Page 63 19. Checking and adjusting toe-in When a tractor runs, front wheels intend to go outward due to camber angle. The toe-in gives a counter force against outward force to run straight. If the toe-in is not adjusted appropriately, steering may not be stable.
  • Page 64 Front 7-14 (4) 180 (1.8) Rear 11.2-24 (4) 120 (1.2) EF312T, EF352T Hub bolt and nut tightening torque 118 to 147Nm Front wheel (12 to 15kgf-m) Tightening torque 177 to 196Nm Tighten hub bolts and nuts with specified tightening...
  • Page 65 22. Color of exhaust gas The color of exhaust gas is black just after engine starts and it is gray or no color during operation. Black: Incomplete combustion due to dense fuel. White: Engine oil is burning. Normal exhaust may look white at extremely low temperature.

  • Page 66: Troubleshooting

    Water, dirt, or air in fuel system Drain, flush & bleed fuel system. Engine runs irregularly or Dirty or faulty injection nozzles See your YANMAR dealer. stalls frequently Improper type of fuel Use proper fuel. Engine solenoid linkage out of See your YANMAR dealer.
  • Page 67 Cooling system needs flushing Flush cooling system. Defective thermostat Remove and check thermostat. Defective temperature gauge or See your YANMAR dealer. sender Oil viscosity is too light Use proper viscosity oil. High oil consumption Check for leaks in lines, seals, drain plug Oil leaks and around gaskets.
  • Page 68 Hydraulic oil too cold Allow oil to warm up. Implement not raises Hydraulic oil filter clogged Replace filter. Defective hydraulic pump or control See your YANMAR dealer. valve Oil leaks Check oil leaks. Hydraulic stop valve closed Open stop valve.

  • Page 69: Specifications

    SPECIFICATIONS Model EF312T（4WD） EF352T（4WD） Make Yanmar Model 3TNV84 3TNV88 Type Direct injection, Water cooled, diesel SAE Gross (hp) 30.1 34.5 Output Engine SAE Gross (ps) 30.5 35.0 Rated RPM (rpm) 2500 2600 No. of cylinders Displacement (cc) 1,496 cc 1,642 cc Fuel tank (lit.)
  • Page 70 1-32, Chayamachi, Kita-ku, OSAKA 530-8321, JAPAN TeL : 06-6376-6336～8 Fax : 06-6373-9474 Revised April 2007 PRINTED IN JAPAN OPE_EF312T&352T_en.doc...

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