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Yamaha YT624 Owner's Manual

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Snowblower
Read this manual carefully before operating this machine.
OWNER'S MANUAL
YT624
7T0-28199-70

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Summary of Contents for Yamaha YT624

  • Page 1 Snowblower Read this manual carefully before operating this machine. OWNER’S MANUAL YT624 7T0-28199-70...
  • Page 3 * Take care of this manual. Please attach this manual to the product when it is lent or trans- ferred to another person. * When depositing the product, batteries, oil or other components, consult a Yamaha dealer for guidelines on protecting the environment.

  • Page 4: Table Of Contents

    CONTENTS PRODUCT SERIAL NUMBER LABEL ..1 CHECKING THE EXHAUST SAFETY INFORMATION ......2 SYSTEM ...........27 LOCATION OF IMPORTANT LABELS ..7 CHECKING THE AUGER CLUTCH DESCRIPTION ..........9 AND DRIVE CLUTCH FOR CONTROL FUNCTION ......13 OPERATION MALFUNCTION ..27 ENGINE SWITCH ........13 CHECKING THE CHUTE OPERATION ........27 RECOIL STARTER.......14 THROTTLE/CHOKE LEVER ....14...
  • Page 5 CONTENTS CHECKING AND ADJUSTING THE TRACK TENSION .....55 REPLACING THE SPROCKET PIN ..56 BATTERY ..........57 REPLACING THE FUSE .....59 LUBRICATING EACH PART ....61 STORAGE ..........63 SHORT-TERM ........63 LONG-TERM ........66 SPECIFICATIONS ........67 INDEX ............69...

  • Page 6: Product Serial Number Label

    PRODUCT SERIAL NUMBER LABEL Both the product name and the product Product name: serial number are required when making inquiries and reordering of parts. Check the product serial number label, and Product serial fill the product name and the serial number number: columns at right.

  • Page 7: Safety Information

    SAFETY INFORMATION Read and understand this owner’s manual Never operate the Snowblower when you and labels attached to the Snowblower are tired or under the influence of alcohol completely before operating the Snowblow- or drugs. Wear non-slip footwear, warm clothing and 1.
  • Page 8 SAFETY INFORMATION Do not start the engine with the guard or Gasoline is a highly flammable and easily cover removed. ignitable fuel. Always turn off the engine and avoid open flame while filling the fuel tank. Check for foreign objects in rotating parts such as the auger and impeller or in the chute before operating.
  • Page 9 SAFETY INFORMATION Do not allow anyone except the operator of Do not fix the auger clutch lever or drive the Snowblower near the place you wish to clutch lever intentionally as this will prevent clear snow from. the safety device to operate. Do not look in the rotating parts such as Do not blow snow across the face of a the auger and impeller or in the chute or...
  • Page 10 The muffler (exhaust pipe) will still be hot noticed coming from the Snowblower, stop immediately after the engine has stopped. the engine and ask a Yamaha dealer to Place the Snowblower in a place where pe- check and/or perform maintenance.
  • Page 11 SAFETY INFORMATION To attach a cover or similar device to the Snowblower, wait until the engine and muf- fler have completely cooled down. – 6 –...

  • Page 12: Location Of Important Labels

    LOCATION OF IMPORTANT LABELS To use the product safely, read the labels affixed to the machine, and use according to the instructions on the labels. If these important labels are damaged or missing, contact a Yamaha dealer for replacements. – 7 –...
  • Page 13 LOCATION OF IMPORTANT LABELS EMISSION CONTROL INFORMATION EMISSION CONTROL INFORMATION YAMAHA MOTOR CO.,LTD. YAMAHA MOTOR CO.,LTD. EMISSION COMPLIANCE PERIOD : HOURS EF : DISPLACEMENT : This engine is certified to operate on unleaded gasoline. ENGINE OIL : TYPE : No other adjustments needed.

  • Page 14: Description

    DESCRIPTION 1. Chute 2. Muffler 3. Fuel tank 4. Working light 5. Fuel gauge 6. Transmission (HST) oil reservoir 7. Spark plug cap/Spark plug 8. Left side cover 9. Impeller 10. Shear bolt guard 11. Auger 12. Auger housing – 9 –...
  • Page 15 DESCRIPTION 1. Engine oil inspection cover 2. Clean-out tool (lodged snow remover) 3. Right side cover 4. Scraper 5. Skid 6. Track 7. Recoil starter 8. Fuel cock 9. Air filter 10. Control panel 11. Handlebar 12. Fuel tank cap –...
  • Page 16 DESCRIPTION 1. Drive clutch lever 7. Auger housing height control lever 2. Shift lever 8. Engine switch 3. Chute direction control lever 4. Chute deflector control lever 5. Throttle/Choke lever 6. Auger clutch lever 1. Fuel tank cap 2. Fuel tank 3.
  • Page 17 DESCRIPTION 1. Electric starter 3. Battery 2. Fuse 4. Engine oil filler cap 1. Carburetor 2. Engine oil drain bolt – 12 –...

  • Page 18: Control Function

    CONTROL FUNCTION ENGINE SWITCH NOTICE 9 Do not continue to use the starter motor for more than 5 seconds. Do- ing so will consume a large amount STOP START of power and it may exhaust the bat- tery. 9 Do not leave the key in the “ON 7” position for a long time while the en- gine is stopped.

  • Page 19: Recoil Starter

    CONTROL FUNCTION RECOIL STARTER THROTTLE/CHOKE LEVER 1. Recoil starter handle 1. Throttle/Choke lever 2. “START 1” Used to start the engine. 3. “FAST :” Pull the recoil starter slowly until it is en- 4. “SLOW ” gaged, then pull it briskly. Throttle/Choke lever controls the choke and NOTICE the engine speed.

  • Page 20: Shift Lever

    CONTROL FUNCTION SHIFT LEVER CHUTE DIRECTION CONTROL LEVER 1. Shift lever 2. “F” (Forward) 1. Chute direction control lever 3. “N” (Neutral) 2. Right 4. “R” (Reverse) 3. Left 4. Chute Used to switch to forward or reverse move- 5. Clockwise ment, and to control traveling speed.

  • Page 21: Chute Deflector Control Lever

    CONTROL FUNCTION CHUTE DEFLECTOR running, it may exhaust the battery. CONTROL LEVER The chute movement speed does not in- crease even if you press the chute direction control lever forcefully. 1. Chute deflector control lever 2. Pull 3. Push 4. Chute deflector 5.

  • Page 22: Drive Clutch Lever

    CONTROL FUNCTION DRIVE CLUTCH LEVER AUGER CLUTCH LEVER 1. Drive clutch lever 1. Auger clutch lever Used to make the Snowblower travel. Used to rotate the auger. Hold the drive clutch lever: Hold the auger clutch lever: The Snowblower travels. The auger rotates.

  • Page 23: Auger Housing Height Control Lever

    CONTROL FUNCTION AUGER HOUSING HEIGHT FUEL TANK CAP CONTROL LEVER 1. Fuel tank cap 1. Auger housing height control lever Turn the fuel tank cap counterclockwise to remove. Used to adjust the height of the auger housing. WARNING After refueling, make sure the fuel tank To raise the auger housing: cap is tightened securely.

  • Page 24: Fuel Gauge

    CONTROL FUNCTION FUEL GAUGE FUEL COCK 1. Fuel gauge 1. Fuel cock lever 2. Needle 2. “ON” 3. “E” (Empty) 3. “OFF” 4. “Carb Drain” Indicates the fuel level in the fuel tank. 5. “Hose Drain” Refuel when the needle of fuel gauge is 6.

  • Page 25: Skid

    CONTROL FUNCTION SKID SCRAPER 1. Skid 1. Scraper 2. Auger end 3. Road surface The scraper is used to flatten the surface to 4. Clearance plow snow. Adjust the clearance between the road surface and the scraper end ac- The skid is used to determine a clearance cording to road surface conditions (see between the auger end and the road sur- page 54).

  • Page 26: Shear Bolt Guard

    When the deviation of the shear bolt guard pin from the center of the damper is as shown, the damper should be replaced. Have a Yamaha dealer replace the part. 9 If you keep operating the Snowblower with the damper protruding from the shear bolt guard, the shear bolt could break.

  • Page 27: Clean-Out Tool (Lodged Snow Remover)

    CONTROL FUNCTION CLEAN-OUT TOOL (LODGED WORKING LIGHT SNOW REMOVER) 1. Working light 1. Chute The working light automatically lights up 2. Clean-out tool (lodged snow remover) when the engine switch is turned to “ON 7” to illuminate the front of the Snowblower. NOTICE Do not keep the engine switch in the “ON 7”...

  • Page 28: Pre-Operation Check

    0 For safe use, conduct checks accord- 9 Handlebar for looseness or play ing to your own knowledge and abili- 9 Operation of starter motor ty. Consult a Yamaha dealer about any 9 Engine for poor starting or abnormal check-related issues that you deem noise beyond your ability to manage.

  • Page 29: Checking The Fuel Level

    PRE-OPERATION CHECK CHECKING THE FUEL LEVEL close to the Snowblower while refuel- ing. Check that the needle in the fuel gauge is 9 Before opening the fuel tank cap, pointing to the “F” (Full) level. discharge any static electricity on If the fuel level is low, remove the fuel tank yourself by touching a metal chassis cap and refill the tank.

  • Page 30: Checking The Engine Oil

    PRE-OPERATION CHECK CHECKING THE ENGINE OIL Remove the engine oil filler cap, and make sure the engine oil is at the correct engine oil level. 1. Position the Snowblower on a level sur- face. 2. Pull out the lower part of the engine oil inspection cover while pressing up the tab of the cover.

  • Page 31: Checking The Transmission (Hst) Oil

    PRE-OPERATION CHECK CHECKING THE recommended oil up to the specified level (see page 46). TRANSMISSION (HST) OIL Check the transmission oil quantity before Recommended transmission (HST) oil: starting the engine and the transmission Diesel engine oil (HST) is cold. SAE 10W-30, Class CD or higher 1.

  • Page 32: Checking The Auger

    1. Auger clutch lever If any looseness or play is found, consult a 2. Drive clutch lever Yamaha dealer. CHECKING THE CHUTE CHECKING THE STARTER OPERATION MOTOR OPERATION After starting the engine, make sure that Turn the engine switch key to the “START...

  • Page 33: Operation

    OPERATION STARTING THE ENGINE (FOR 2. Turn the fuel cock lever from the “OFF” position to the “ON” position. RECOIL START) WARNING Never operate the engine in a closed area. Exhaust fumes contain harmful chemicals such as carbon monoxide. Operating the engine in poor ventilated area or indoor could cause the carbon monoxide poisonous.
  • Page 34 OPERATION 5. Pull the recoil starter slowly until it is engaged, then pull it briskly. 1. Throttle/Choke lever 2. “START 1” 3. “FAST :” 1. Recoil starter handle NOTICE 7. When the engine is warmed up, move the throttle/choke lever from the “FAST Release the recoil starter handle slowly.

  • Page 35: Starting The Engine (For Electric Start)

    OPERATION STARTING THE ENGINE (FOR 2. Turn the fuel cock lever from the “OFF” position to the “ON” position. ELECTRIC START) WARNING Never operate the engine in a closed area. Exhaust fumes contain harmful chemicals such as carbon monoxide. Operating the engine in poor ventilated area or indoor could cause the carbon monoxide poisonous.
  • Page 36 OPERATION this key. The key will return to the “ON 7” 6. When the engine is warmed up, move position automatically. the throttle/choke lever from the “FAST :” position to the “SLOW ” position. If the engine fails to start within 5 seconds after turning the engine switch key, return the key to the “STOP 5”...

  • Page 37: Stopping The Engine

    OPERATION STOPPING THE ENGINE MOVING THE SNOWBLOWER 1. Turn the engine switch key to the “STOP 1. Use the auger housing height control 5” position. lever to raise the auger to the highest position. STOP START 1. “STOP 5” 2. Engine switch key 1.
  • Page 38 OPERATION 1. Throttle/Choke lever 1. Shift lever 2. “FAST :” 2. “F” (Forward) 3. “N” (Neutral) 3. Hold the drive clutch lever. 4. “R” (Reverse) NOTICE 9 Move the shift lever to the “N” (Neu- tral) position, and then hold the drive clutch lever.

  • Page 39: Clearing Snow

    OPERATION CLEARING SNOW WARNING 9 Do not point the discharge chute to- ward people, buildings or cars. 9 If any foreign objects have become lodged in the impeller, auger, or track, stop the engine immediately and re- move them. Check the Snowblower for damage. If any damage is found, repair the Snowblower completely before using it again.
  • Page 40 OPERATION tral) position first, and then hold the NOTICE drive clutch lever. Operate the shift lever slowly. 9 Operate the drive clutch lever slowly. 9 If the engine speed drops excessively and snow is not being blown properly, you may be driving the machine too quickly.
  • Page 41 OPERATION 1. Auger clutch lever 2. Drive clutch lever – 36 –...
  • Page 42 OPERATION Drive clutch lever and auger clutch lever Useful information for operation If the auger clutch lever is held once while you are holding the drive clutch lever, the auger clutch lever will become fixed. The Snowblower will carry out snow clearing even if the auger clutch lever is released.

  • Page 43: Stopping The Snowblower

    OPERATION STOPPING THE SNOWBLOWER 1. Release the auger clutch lever and drive clutch lever. 1. Auger clutch lever 1. Auger clutch lever 2. Drive clutch lever 2. Move the shift lever to the “N” (Neutral) position. 4. Release the auger clutch lever. 1.

  • Page 44: Moving The Snowblower With The Engine Stopped

    OPERATION MOVING THE SNOWBLOWER WITH THE ENGINE STOPPED Follow the step below to move the Snow- blower with the engine stopped. NOTICE 9 Do not start the engine. 9 Position the Snowblower on a level surface before beginning the follow- ing procedure.

  • Page 45: High Altitude Operation

    4000 ft. (1219 me- ters). If you operate your engine at altitudes above 4000 ft. (1219 meters) consistently, have your local Yamaha dealer perform the necessary carburetor modification. This engine should be operated in its original configuration below 4000 ft.

  • Page 46: Periodic Maintenance

    WARNING If you are not familiar with maintenance work, have a Yamaha dealer do it for you. CHECK BEFORE USE The customer needs to perform the routine inspection (see page 23). If any problems are dis- covered during the inspection, contact a Yamaha dealer and request an inspection or main- tenance.

  • Page 47: Maintenance Chart

    NOTICE Use only Yamaha specified genuine parts for replacement. Ask an authorized Yamaha dealer for further attention. Items marked with an asterisk should be performed by a Yamaha dealer as they require spe- cial tools, data and technical skills. Initial...
  • Page 48 PERIODIC MAINTENANCE Initial Every Pre- Item Routine operation Remarks check month months months * 9 Oil change Worm gear Drive belt 9 Check for belt condition 9 Oil level Transmission * 9 Oil leakage Ignition system 9 Checking the spark plug 9 Electric starter working conditions 9 Engine starting condi-...

  • Page 49: Changing The Engine Oil

    9 As correct disposal of used oils is man- 1. Engine oil filler cap dated by regulations (such as pollution prevention act), consult a Yamaha dealer 5. Remove the screws 1. Then, remove for oil disposal guidelines. the screw 2 and collar, and the left side 9 For the first engine oil change, change cover.
  • Page 50 PERIODIC MAINTENANCE 1. Engine oil drain bolt 1. Correct engine oil level 2. Engine oil drain bolt gasket Engine oil quantity: 0.6 L (0.63 US qt, 0.53 Imp qt) 8. Install the engine oil drain bolt and its Recommended engine oil: new gasket, and then tighten the engine See page 25 oil drain bolt to the specified torque.

  • Page 51: Refilling The Transmission (Hst) Oil

    PERIODIC MAINTENANCE REFILLING THE TRANSMISSION (HST) OIL WARNING Position the Snowblower on a level sur- face. 1. Stop the engine and remove the engine switch key. 2. Remove the oil reservoir cap and the diaphragm. 1. Transmission (HST) oil reservoir 2.

  • Page 52: Changing The Worm Case Oil

    PERIODIC MAINTENANCE CHANGING THE WORM CASE If necessary, have a Yamaha dealer change the worm case oil. For the first worm case oil change, change the worm case oil after 20 operating hours (that is, when you have refueled four times).

  • Page 53: Checking And Cleaning The Spark Plug

    If there are any resulting in a fire and serious burns. black or white burn marks, consult a Yamaha dealer. 1. Stop the engine and remove the engine 5. Remove deposits (carbon) from the switch key.

  • Page 54: Cleaning The Fuel Strainer

    PERIODIC MAINTENANCE CLEANING THE FUEL 7. Install the spark plug, and then tighten the spark plug to the specified torque. STRAINER Tightening torque: WARNING 20 N·m (2.0 kgf·m, 15 lb·ft) Gasoline is a highly volatile and flam- mable fuel. When handling gasoline, be sure to observe the following points.

  • Page 55: Adjusting The Skids

    PERIODIC MAINTENANCE ADJUSTING THE SKIDS 4. Clean the fuel strainer cup and the fuel strainer, and wash them using gasoline. WARNING Position the Snowblower on a level sur- face. Adjust the clearance between the auger end and the road surface correctly accord- ing to the road conditions.
  • Page 56 PERIODIC MAINTENANCE Adjust the left and right skids so they are both the same height. 8. Tighten the nuts of skid to the specified torque. Tightening torque: Nut: 16 N·m (1.6 kgf·m, 12 lb·ft) 1. Auger housing height control lever 2.

  • Page 57: Replacing The Auger Shear Bolts

    PERIODIC MAINTENANCE REPLACING THE AUGER SHEAR BOLTS WARNING 9 Do not look into or put your hands near the impeller or auger when they are rotating. 9 When removing snow lodged in a rotating part with the clean-out tool (lodged snow remover), stop the en- gine, remove the engine switch key, and wait until all moving parts have 1.

  • Page 58: Replacing The Impeller Shear Bolt

    PERIODIC MAINTENANCE REPLACING THE IMPELLER SHEAR BOLT WARNING 9 Do not look into or put your hands near the impeller or auger when they are rotating. 9 When removing snow lodged in a rotating part with the clean-out tool (lodged snow remover), stop the en- gine, remove the engine switch key, and wait until all moving parts have 1.

  • Page 59: Adjusting The Scraper

    PERIODIC MAINTENANCE ADJUSTING THE SCRAPER WARNING Position the Snowblower on a level sur- face. 1. Stop the engine and remove the engine switch key. 2. Loosen the nuts. 3. Loosen the left and right bolts. 1. Clearance between scraper end and road surface 2.

  • Page 60: Checking And Adjusting The Track Tension

    PERIODIC MAINTENANCE CHECKING AND ADJUSTING THE TRACK TENSION Make sure that the tension of the track is correct. If the tension of the track is not correct, the track may slip or it may fall off. Adjust the slack if necessary. WARNING Position the Snowblower on a level sur- face.

  • Page 61: Replacing The Sprocket Pin

    PERIODIC MAINTENANCE REPLACING THE SPROCKET Tightening torque: Locknut: If an excessive load is applied to the driving 16 N·m (1.6 kgf·m, 12 lb·ft) system, for example, when the Snowblower Wheel nut: is stuck in a rut, the sprocket pin will be cut 53 N·m (5.3 kgf·m, 39 lb·ft) to protect the driving system.

  • Page 62: Battery

    It is not necessary to refill or inspect the battery fluid. If there are any problems with the battery, bring it to a Yamaha dealer to have it in- spected and serviced. Remove the battery and clean it when there is any contamination or corrosion on the battery terminals.
  • Page 63 4. First disconnect the battery negative Charging the battery lead from the negative battery terminal, Have a Yamaha dealer charge the battery and then disconnect the battery positive as soon as possible if it seems to have dis- lead from the positive battery terminal.

  • Page 64: Replacing The Fuse

    PERIODIC MAINTENANCE REPLACING THE FUSE NOTICE A battery charger specially designed for WARNING hermetically sealed batteries is needed 9 Always use a fuse of the specified to charge this battery. Using a normal rating, and never use a substitute battery charger will damage the battery. object in place of the proper fuse.
  • Page 65 1. New fuse 2. Blown fuse If the fuse immediately blows again, have a Yamaha dealer check the electrical system. 4. Install the right side cover and collars to their original positions, and tighten the screws 2. Then, tighten the screws 1.

  • Page 66: Lubricating Each Part

    PERIODIC MAINTENANCE LUBRICATING EACH PART Lubricate each drive shaft (arrow portion) with grease or engine oil (SAE 5W-30) every month of operation or after every 10 hours of each operation, whichever comes first. 9 Moving parts of chute deflector control lever 9 Shift lever moving parts 9 Chute assembly moving parts 9 Chute motor gears and ring gears...
  • Page 67 PERIODIC MAINTENANCE 7. Chute assembly moving parts 8. Chute motor gears and ring gears – 62 –...

  • Page 68: Storage

    STORAGE SHORT-TERM To have your Snowblower checked or main- tained before storage, consult a Yamaha If you need to store the Snowblower for dealer. more than 3 months, follow steps 1–17 to If you conduct the checks and maintenance make sure it is ready for the next use.
  • Page 69 STORAGE See the battery section for procedures for battery terminal cleaning, charging and storage (see page 57). 4. Remove the fuel tank cap, and empty the fuel tank. 1. Ring nut 2. Fuel strainer cup Prepare a suitable container to collect the extracted gasoline.
  • Page 70 STORAGE 1. Fuel cock lever 1. “Hose Drain” 2. “ON” 2. “Carb Drain” 3. “OFF” 3. Fuel cock lever 4. Fuel drain hose 8. Turn the fuel cock lever from the “ON” NOTICE position to the “Carb Drain” position. Immediately wipe off spilled fuel with Drain the gasoline from the carburetor a clean, dry, soft cloth, since fuel may into the container through the fuel drain...

  • Page 71: Long-Term

    STORAGE LONG-TERM 15. Remove snow and water from the sur- face of the Snowblower, auger, chute If the Snowblower is not used for a long pe- and other components using dry rags. riod of time, follow the steps below to keep it in good condition.

  • Page 72: Specifications

    SPECIFICATIONS Model name YT624 Overall length 1468 mm (57.80 in) Overall height 1108 mm (43.62 in) Overall width 621 mm (24.45 in) Weight 112 kg (247 lb) Snow clearing width 615 mm (24.21 in) Snow clearing height 440 mm (17.32 in)
  • Page 73 SPECIFICATIONS Model name YT624 Working light 12 V, 6 W Fuse capacity 20 A (blade-type fuse) * The power rating of the engine indicated in the SPECIFICATIONS is the net power output tested on an engine model and measured at 3600 r/min.

  • Page 74: Index

    INDEX CHUTE DEFLECTOR ADJUSTING THE SCRAPER ....54 CONTROL LEVER ......16 ADJUSTING THE SKIDS .....50 CHUTE DIRECTION AUGER CLUTCH LEVER ....17 CONTROL LEVER ......15 AUGER HOUSING HEIGHT CLEANING THE FUEL STRAINER ..49 CONTROL LEVER ......18 CLEAN-OUT TOOL (LODGED SNOW REMOVER) ..22 BATTERY ..........57 CLEARING SNOW .......34 CONTROL FUNCTION ......13...
  • Page 75 INDEX REPLACING THE AUGER SHEAR BOLTS ..........52 REPLACING THE FUSE .....59 REPLACING THE IMPELLER SHEAR BOLT ........53 REPLACING THE SPROCKET PIN ..56 SAFETY INFORMATION .......2 SCRAPER ..........20 SHEAR BOLT GUARD ......21 SHIFT LEVER ........15 SKID .............20 SPECIFICATIONS ........67 STARTING THE ENGINE (FOR ELECTRIC START) ....30 STARTING THE ENGINE (FOR RECOIL START) .....28...
  • Page 76 PRINTED IN JAPAN 2019 • 05 × 1 ! YAMAHA MOTOR CO., LTD. 7T0-28199-70-E0...

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