Yanmar EF494T Operator's Manual
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Yanmar EF494T Operator's Manual

Yanmar EF494T Operator's Manual

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OPERATOR'S MANUAL
DIESEL TRACTOR
EF494T
en
Original instructions

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Summary of Contents for Yanmar EF494T

  • Page 1 OPERATOR’S MANUAL DIESEL TRACTOR EF494T Original instructions...
  • Page 2 EF494T OM SAFETY Never attempt to operate or service this machine until you have first read and understood all of the applicable Safety Instructions that are set forth in this Manual. The failure to comply with all relevant Safety Instructions could result in bodily...

  • Page 3: To The Owner

    Please read this manual carefully before using the tractor. Keep this manual close to your tractor, after you have read through it. If you lose or damage this manual, ask your YANMAR dealer for a new manual right away. IMPROVEMENT Sometimes parts are changed to improve or upgrade the features of the tractor, or for other reasons.

  • Page 4: Table Of Contents

    EF494T OM TABLE OF CONTENTS SAFETY INSTRUCTIONS AFTER SALES SERVICE AND WARRANTY After sales service Availability of spare parts PART NAMES SAFETY LABEL LOCATION FUNCTION OF EACH CONTROL Engine Traveling, PTO related functions Hydraulic system Others PRE-OPERATION CHECKS 1. Pre-operation checks 2.
  • Page 5 EF494T OM 15. Adjusting steering wheel 16. Adjusting fan belt 17. Adjusting tow-in 18. Replacing fuse 19. Checking tires 20. Color of exhaust gas TROUBLESHOOTING 1. Engine parts 2. Clutch, brake and related parts 3. Hydraulic system 4. Electric system...

  • Page 6: Safety Instructions

    EF494T OM SAFETY INSTRUCTIONS DANGER Read these instructions carefully. Important instructions are given for the safe operation and servicing of the tractor. Failure to follow these instructions is likely to result in an accident involving death or serious injury. STUDY THE TRACTOR AND IMPLEMENTS Do not permit anyone unfamiliar with the tractor or the operations of its implements to use the machine.
  • Page 7 EF494T OM PROTECT OPERATOR SAFELY Install an approved Roll-over Protective Structure (ROPS) for safe operation. If a tractor rolls over without a ROPS, death or serious injury is likely. Always fasten the seat belt while operating the tractor with Roll-over Protective Structure (ROPS) up.
  • Page 8 EF494T OM BEFORE OPERATING Do not operate the tractor when tired, sick, sleepy, drunk, feeling overworked, taking medicine, pregnant, suffering from mental disease or if other improper conditions are present. These conditions impair a person’s skill and judgment. When you begin feeling tired while operating the tractor, take a 10-minute break to stretch, walk about, lie down or snack.
  • Page 9 EF494T OM STARTING START THE ENGINE SAFELY If you operate the engine inside a closed building, be sure there is plenty of ventilation before starting the engine. Exhaust fumes are poisonous. Carbon monoxide is especially dangerous because it is odorless and colorless.
  • Page 10 EF494T OM DURING OPERATION OPERATE THE TRACTOR SAFELY Keep people and pets a safe distance away when starting and operating the tractor and implement. Do not permit any person other than the operator to ride or board the tractor or implements, including any wagons.
  • Page 11 EF494T OM OPERATE THE TRACTOR SAFELY (continued) Oversized implements dangerous tractor operation and are not safe for you. Refer to the implement’s operator manual for the minimum and maximum horsepower requirements and weights that are allowed. When using a heavy implement in front, always install ballast or an implement on the rear for safe, stable steering control.
  • Page 12 EF494T OM AVOID TIPPING OVER When starting the tractor on an uphill slope, shift to as low a gear as possible and reduce the engine speed to avoid tipping over backward. Do not drive near the edge of a gully or a steep embankment.
  • Page 13 EF494T OM STAY CLEAR OF THE PTO The PTO shaft safety guard (A) should be installed when the PTO system is not in use. Make sure that the tractor PTO speed matches the implement’s required PTO speed. Do not drive or operate the implement beyond the tractor’s PTO speed.
  • Page 14 EF494T OM TRANSPORTING Raise all implements and place them in the locked-for- transport position. Do not drive the tractor on the road with implements in motion. Couple the brake pedals together for travel at road speeds. (This only applies to models with two brake pedals.)
  • Page 15 EF494T OM TOWING When towing a load that weighs more than the tractor, the trailer should have its own brakes. When towing, drive slowly, avoid hills and apply the brakes gently. A safety chain will help control an implement being pulled if it accidentally separates from the drawbar while traveling.
  • Page 16 EF494T OM MAINTENANCE AND SERVICE AVOID EXPLOSIONS OR FIRES Refuel the tractor when the engine is cool and in a well- ventilated area, preferably outside. Never fill the fuel tank with the engine running. Be sure to use the correct type and grade of fuel.
  • Page 17 Do not use substitute parts that may not meet the strength and design requirements or may not fit the tractor. Do not use repair parts not approved by YANMAR. Remove the radiator cap only when the coolant temperature is low. Wait at least one hour after operation, to allow the coolant to cool down.
  • Page 18 EF494T OM MAINTENANCE AND SERVICE (continued) Hydraulic oil or diesel fuel escaping under pressure can penetrate the skin and cause serious injury. Before disconnecting any lines, be sure to relieve all pressure. Before applying pressure, be sure all connections are tight and all components are in good condition.
  • Page 19 EF494T OM Storage Whenever the tractor will not be used for a few months, do the following: (1) Drain the fuel tank. (2) Lower any implement still attached. (3) Set the parking brake and block the wheels. (4) Remove the battery and store it in a cool, dry place, out of the reach of children.

  • Page 20: After Sales Service And Warranty

    Maintenance parts and spare parts will be available for 10 years after the production of this tractor series has been discontinued. However, special parts will be available subject to consultation. Yanmar may be able to supply a particular part after the normal supply period. (A) Tractor serial number...
  • Page 21 FUSE BOX (1) The alternator fuse (60A) and main fuse (60A) are of slow blow type. When any of these has been blown, contact your local YANMAR dealer. (A) Main fuse: 60A (B) Alternator fuse: 60A (2) The electrical fuses are in the engine compartment.
  • Page 22 Any accident or failure resulting from adjusting the screw would not be covered by Yanmar's guarantee.  Do not try to unseal and adjust engine fuel injection pump (B). Any accident or failure resulting from adjusting the pump would not be covered by Yanmar's guarantee.
  • Page 23 EF494T OM WARNING  Do not move the tractor if the wheel mounting bolts or nuts are loose. If the tractor is driven with loose nuts or bolts, there is a possibility that an accident will occur.  Make daily and periodic wheel inspections to check for loose nuts and bolts on the wheels.

  • Page 24: Part Names

    EF494T OM PART NAMES Bonnet (10) Rear wheel Headlights (11) Hydraulic stop-slow return valve Side lens (12) Sub step Front axle bracket (13) Operator’s seat Front wheels (14) Top link Steering wheel (15) Lower link Safety frame (ROPS) (16) PTO shift lever...
  • Page 25 EF494T OM Light switch, Horn switch, Flasher switch (10) Accelerator lever Reverser lever (11) Main shift lever Clutch pedal (12) Brake pedal Parking brake lever (13) Accelerator pedal Operator's seat adjusting pin (14) Differential lock pedal Range shift lever (15) Position control lever...

  • Page 26: Safety Label Location

    EF494T OM SAFETY LABEL LOCATION (A) ROPS right side frame (1) 1A7874-65360 (2) 1A8310-65310 (3) 1A8310-65340 Label, brake coupling Label, caution Label, fire caution (4) 198163-65350 (5) 198283-65651 Label, danger rotate shaft Label, Thailand only Label, tractor ID Label, engine ID...

  • Page 27: Function Of Each Control

    EF494T OM FUNCTION OF EACH CONTROL Engine Main switch Used to turn on and off the engine WARNING When the tractor is not in use, never fail to remove the key and store it at a safe location. Do not allow a child to access the key.

  • Page 28: Traveling, Pto Related Functions

    EF494T OM Traveling, PTO related functions Main shift lever (A) Main shift lever :1, 2, 3, N This lever changes the transmission system in 3 stages. Combination with the range shift and reverser creates 9 forward speeds and 9 reverse speeds. Operate the main shift lever while depressing the clutch pedal.
  • Page 29 EF494T OM PTO SHIFT LEVER CAUTION Strictly maintain the PTO speed as specified by the implement. Otherwise, the implement can be damaged, leading to an accident. (A) PTO shift lever The PTO shaft (power takeout shaft) changes its speed in 2 stages. To change the speed, depress the clutch pedal all the way.
  • Page 30 EF494T OM Clutch pedal (A) Clutch pedal To disengage the clutch function, quickly depress the pedal. To engage, slowly release the pedal. Do not keep your foot on the clutch pedal unless necessary. Otherwise, the lifetime of the clutch may be reduced.

  • Page 31: Hydraulic System

    EF494T OM Hydraulic system Position control lever (A) Position control lever (B) Raise (C) Lower (D) Stopper This lever fixes an implement in a definite position. The stopper is used to limit the working range of the position control lever. To adjust the stopper position, loosen the knob.
  • Page 32 EF494T OM 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.
  • Page 33 EF494T OM INSTRUMENT PANEL (A) Tachometer Fuel gauge (A) Red region Indicates the remaining fuel level. Prepare to replenish fuel if the pointer comes in the red area. Water temperature (A) Red region Indicates the temperature of the cooling water in operation. If the pointer comes in the red region, stop the work and check for abnormality.

  • Page 34: Others

    EF494T OM Others Driver's seat adjustment pin The driver's seat should be adjusted to suit your physical shape. (A) Seat adjust lever (B) Release (C) Lock Seat belt WARNING  Always fasten seat belt while operating the tractor with the ROPS.

  • Page 35: Pre-Operation Checks

    EF494T OM PRE-OPERATION CHECKS Pre-operation checks DANGER  Never lubricate or supply fuel oil while the engine is warm.  Never smoke during fuel replenishing.  Never use bare lamp/light during fuel replenishing.  Do not crawl or step under a service machine.
  • Page 36 EF494T OM For safety reasons, always check the tractor before initiating day's works. Remove any abnormalities. CHECK THE FOLLOWINGS IN ORDER: (1) Abnormalities in previous day. (2) Walk around the tractor to look into:  Deformed parts, damages, wear.  Air pressure of tires, wear of tires.
  • Page 37 EF494T OM  Clogging or dirt in air filter.  Tension or damage of cooling fan belt.  Check the radiator grill and engine room for dust.  Check electrical wiring for wear of sheath and loose joints. (4) Sitting on the operator’s seat.
  • Page 38 EF494T OM  Play in the steering wheel. (A): Play 20-50mm  Effect and play in the clutch pedal. (A): Play 15-25mm (5) Start the engine:  Check for abnormal sound.  Color of exhaust gas. (A) What color?  Function of lamps and meters.

  • Page 39: Breaking In The Engine (First 50 Hours)

    EF494T OM Breaking in the engine (first 50 hours) The new tractor should be operated carefully for the first 50 hours. This will have a large positive effect on the lifetime and performance of the tractor throughout its life. Pay particular attention to the following points: (1) Refrain from abrupt starts and stops.
  • Page 40 EF494T OM Starting CAUTION Do not start the engine if the position control lever is not in the LOW position. The implement may abruptly raise causing a damage or injury to the human and machine. (1) Set the fuel filter and water separator to "O" to open the fuel cock.

  • Page 41: Raising Or Lowering Implement

    EF494T OM (6) Warm up the engine by running under no-load at 1500 rpm for 5 minutes approximately. (A) 1500 rpm NOTE:  The starter motor consumes plenty of current from the battery. Do not keep it running for more than 10 seconds.

  • Page 42: Starting And Stopping

    EF494T OM Starting and stopping WARNING  Make a slow start after calling attention of the people in the vicinity. Do not make an abrupt start. Human injury can result.  For traveling, never fail to link the left and right brake pedals with the connector.

  • Page 43: Traveling On The Load

    EF494T OM Traveling on the load WARNING  To travel on the road or cross a farm ridge, never fail to link the left and right brake pedals. One-sided braking effect will roll over the tractor or result in a sharp turn.

  • Page 44: Traveling On The Slope

    EF494T OM Traveling on the slope WARNING  Do not change speeds on the slope. Travel slowly on the slope. Use the engine brake on down-slope.  Do not travel on the slope with the reverser lever, the main shift lever or the range shift lever set in the N position.

  • Page 45: Driving In And Out Of Fields

    EF494T OM Driving in and out of Fields WARNING  Always connect the left and right brake pedals with the connector. Otherwise, one-sided braking can cause a roll over.  When approaching the field or when crossing a ditch, use a gangplank of sufficient strength to enter the field.

  • Page 46: Turning In A Field

    EF494T OM Turning in a field WARNING Disconnect the differential lock before turning. Otherwise, an intended turn will not be possible and an accident may result. Refer to the relevant section for operating the differential lock. Reduce the engine speed and make a slow and smooth turn.

  • Page 47: Loading And Unloading

    EF494T OM Loading and unloading DANGER While loading or unloading tractor to or from the truck, never try to change the course on the gangplank. Use the slowest speed. Do not use the clutch. Otherwise, loss of control can result in injury or damage to the tractor.
  • Page 48 EF494T OM DANGER  Do not drive the tractor if the wheel mounting bolts or nuts are loose. If the tractor is driven with loose nuts or bolts, there is a possibility that an accident will occur.  Make daily and periodic wheel inspections to check for loose nuts and bolts on the wheels.

  • Page 49: Hydraulic Output

    EF494T OM Hydraulic output CAUTION Never fail to stop the engine before trying to detach the hydraulic plug or pipes. Otherwise, you may be injured by high pressure oil. Single action cylinder (e.g. dump trailer) (1) Set the position control lever about 20 mm below the top position.

  • Page 50: Using 3-Point Link

    EF494T OM Using 3-point link (1) Mount the lower link on the lower link hinge and fix it with a lock pin. Left and right links are commonly usable, but note the front and rear position. Mount the link so that the link mounting hole comes backward.

  • Page 51: Adjusting Top Link

    EF494T OM *Identify the left and right lift links. Mount the adjustable one to the right and the fixed one to the left. (A) Left lift link (Fixed) (B) Right lift link (Adjustable) (4) Install the top link at the top link hinge hole.

  • Page 52: Mounting General Farm Implements

    EF494T OM Mounting general farm implements (1) Adjust the length of the right lift link to make the left and right lower links equal in height. (A) Lower link (B) Lift link (2) Align the center of the tractor with the center of the implement on the flat ground.

  • Page 53: Notes On Using Service Implement

    EF494T OM (10) Check chains Adjust check chains (A). 1) For use of implements such as a plough, harrow and subsoil, adjust check chains (A) so that an implement can move 5 - 6 cm to right and left. Prevent an implement from swinging to hit against the wheels and tires.

  • Page 54: Using Pto Shift Lever

    EF494T OM Using PTO shift lever CAUTION USE the specified PTO Speed. If not, the implement can be damaged and cause an injury to people in vicinity. PTO speed can be changed in 2 stages to suit a particular work. To change the shift, completely disengage the PTO clutch by stepping on the PTO clutch pedal.

  • Page 55: Safety Frame (Rops)

    EF494T OM Safety frame (ROPS) The safety frame is designed to protect the driver from an accident. Never fail to use the safety frame when the tractor is in use. WARNING  Always fasten the seat belt while operating the tractor with Roll-over Protective Structure up.

  • Page 56: After Operation

    EF494T OM AFTER OPERATION 1. After operation DANGER To cover the tractor for storage, allow at least 10 minutes of cooling time after the engine has been stopped. Otherwise, a fire may start. Wash the tractor with water, wipe off, and lubricate the moving parts and sliding parts.

  • Page 57: Checking And Supplying Fuel

    EF494T OM Removing/mounting the side covers Removing Open the bonnet. Put the locking knobs in the vertical position (each forward and rear). Remove the side covers. Mounting Clamp the cover lower hooks (x 2). Fix the cover top with the locking knob.

  • Page 58: Care For Long Period Of Storage

    EF494T OM Care for long period of storage WARNING For stowage over a long period of time, remove the battery from the tractor and remove the main key. Otherwise, an accident may occur. CAUTION Lock the clutch pedal for stowage over a long period of time.

  • Page 59: Periodic Inspection And Adjustment

    It is recommended to replace fuel pipes, rubber hoses, and electrical wires every two years. IMPORTANT  Only use the Yanmar genuine parts. Otherwise, service accidents can result.  We recommend the use of the Yanmar lubricants that are available from your local Yanmar dealer.

  • Page 60: Check Intervals

    EF494T OM Check intervals x: Checks required CHECK ITEMS 50 h 100h 150h 200h 250h 300h 350h 400h 450h 500h 550h 600h Engine lubrication oil Replace Replace Replace Replace Replace Replace Replace Engine oil element Replace Replace Replace Transmission oil...

  • Page 61: Oil And Grease

    EF494T OM Oil and grease OIL, GREASE TYPE Fuel Diesel fuel only Engine oil SAE 30 or 40 API Grade CD or better Grease Multipurpose Grease Transmission oil, Hydraulic TF-500 Transmission fluid system oil * At temperature below – 10°C, use Super No.3 light oil.
  • Page 62 Add the new oil through the supply port on the rear part.  Transmission oil is commonly used with hydraulic oil and power steering oil.  Use Yanmar transmission fluid TF-500 or equivalent for transmission oil. (A) Drain plug Cleaning transmission oil strainer When replacing transmission oil, wash the oil strainer with diesel fuel.

  • Page 63: Replacing Oil Filter Elements

    Add oil through the right port. Use Yanmar TF500A transmission fluid, or carrier red 80B, or equivalent for front axle oil. (A) Center drain plug...

  • Page 64: Engine Coolant

    EF494T OM Line filter (Transmission oil element) The line filter is of a cartridge type. Replace it with a new one at intervals of 300 hours thence. (A) Line filter Replacement (1) Remove the transmission oil and remove the cartridge by turning it anticlockwise.

  • Page 65: Fuel Line

    EF494T OM Fuel line Fuel filter Replace fuel filter every 300 hours. Replacing (1) Close fuel cock on water separator. (2) Remove the cartridge by turning anticlockwise. (3) Apply a little oil on the rubber ring on the new cartridge. Mount the cartridge by hand first and tight it with filter wrench.

  • Page 66: Replacing Radiator Screen And Air Cleaner Elements

    EF494T OM Replacing radiator screen and air cleaner elements The air cleaner serves to keep the engine in favorable conditions by removing dust in air and preventing the cylinder liner and piston ring from wearing. For operation in a dusty environment, clean the air cleaner element every 50 hours and replace it every 300 hours.

  • Page 67: Checking Battery

    EF494T OM Checking battery DANGER  Never use a fire while checking the battery or the battery cap is removed. Otherwise, a fire or gas explosion may result.  Do not come in contact with the battery fluid. If the fluid attaches on your body or cloth, immediately wash out with water.

  • Page 68: Checking Fluid Lines

    EF494T OM Battery type IMPORTANT Specified battery Parts code No.  Be sure the tractor is level when checking electrolyte level. 75D26R 1A7781-51510  When connecting the battery cables, wipe oil away from the terminal contacts. After connecting cables, Voltage 12Volts apply grease to the terminals.

  • Page 69: Greasing

    EF494T OM Greasing Before initiating day's work, check the greasing condition at each point. Grease up after a work on a muddy field. As a general rule, grease up various points at intervals of 50 hours. (A) Brake pedal shaft...
  • Page 70 EF494T OM Lubricating propeller shaft with grease Lubricate the propeller shaft connection with grease every 500 hr. When working in the wet field, shorter lubrication intervals are suggested. 1. Front end (1) Loosen the band (A). (2) Remove the bolt (B) and the collar (C).
  • Page 71 EF494T OM 2. Rear end (1) Remove the bolt (B) and collar (C) from rear shaft cover (H). (2) Slide the rear shaft cover (H) backward as the right picture shows. (3) Turn over the rubber boots (E) as the right illustration shows.

  • Page 72: Adjusting Brake

    EF494T OM Adjusting brake WARNING  Check if the brake is effective or not one-sided. An accident can result.  Unbalanced play at left and right brake pedals can cause one-sided braking effect. Keep the same amount of play; otherwise, an accident can result.

  • Page 73: Adjusting Clutch

    EF494T OM Adjusting clutch Standard version Depress the clutch pedal to see it there is a specified play of 15-25 mm. It not, adjust the turnbuckle for a play of 15-25 mm. Securely lock the nut after adjustment. (A) Play 15-25 mm...

  • Page 74: Adjusting Fan Belt

    EF494T OM Adjusting fan belt CAUTION Wait until the engine is sufficiently cooled down. Otherwise, you may be burned. (1) Switch off the engine. (2) Open the bonnet, then the left side cover of the engine. (3) Press the fan belt with a finger at the midpoint to see the belt deflections 10-15 mm.

  • Page 75: Replacing Fuse

    EF494T OM Replacing fuse Remove the lid of the fuse box and check the fuse. Replace the blown fuse with new one. Stop the engine and check the main fuse (slow blow fuse) which shuts off the electrical circuit when an excessive current flows.

  • Page 76: Checking Tires

    EF494T OM Checking tires Adjust the air pressure of front and rear tires to the standard pressure. Check the tires for cracks or damage. Adjust the front tire pressure for a maximum in the following table if a load is to be imposed on the front tires through the front weight or front loader.

  • Page 77: Troubleshooting

    EF494T OM TROUBLESHOOTING In case of abnormality of machine, stop the engine and locate a problem by referring to the following table. Engine parts PROBLEM POSSIBLE CAUSE RESPONSE Won't start by main switch Shift lever in N? Set each shift levers in N. Under this condition, turn the main switch to START.

  • Page 78: Clutch, Brake And Related Parts

    EF494T OM Clutch, brake and related parts PROBLEM POSSIBLE CAUSE RESPONSE Clutch not effective Is pedal play proper? Adjust the play of pedal. Brake not effective or effective Is brake pedal play proper? Adjust the play of brake pedal. one sided...

  • Page 79: Specifications

    EF494T OM SPECIFICATIONS MODEL EF494T Drive type 4-wheel Drive Overall length (mm) 3,230 Overall width (mm) 1,605 Overall height (mm) 2,355 Dimensions Wheelbase (mm) 1,830 Front (mm) 1,300, 1,466 Tread Rear (mm) 1,270, 1,344 Ground clearance (mm) Weight (kg) 1,540...

  • Page 80: Implement Capacities

    The Yanmar tractor has been carefully tested in the configuration equipped with implements sold or approved by Yanmar and has proved to perform property. Do not use any implement that has not been sold or recommended by Yanmar, or that fails to satisfy the specified values given below. Using with implements that are not approved by Yanmar could result in malfunction, failure, and damage to the tractor and/or implement, and increase the possibility of injury to the operator or other people.
  • Page 81 EF494T OM...

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