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MTD 644E Operator's Manual

Snow thrower
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Operator's Manual

Snow Thrower

Models
614E, 644E, 664G
Model 664 Shown
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning:
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
PRINTED IN U.S.A.
770-10045H.fm
FORM NO.
(6/2003)

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Summary of Contents for MTD 644E

  • Page 1: Snow Thrower

    Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019. MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 PRINTED IN U.S.A.

  • Page 2: Table Of Contents

    A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below. MTD LLC P. O. BOX 361131 CLEVELAND,OH 44136 330-220-4683 www.mtdproducts.com...

  • Page 3: Important Safe Operation Practices

    SECTION 1: IMPORTANT SAFE OPERATION PRACTICES This symbol points out important safety instructions, which if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine. Failure to comply with these instructions may result in personal injury.

  • Page 4: Maintenance And Storage

    Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Do not operate machine while under the influence of alcohol or drugs. Muffler and engine become hot and can cause a burn. Do not touch.

  • Page 5: Hardware Pack

    SECTION 2: CONTENTS OF HARDWARE PACK Lay out the hardware according to the illustration below for identification purposes. Part numbers are shown in parentheses. (Hardware pack may contain extra items which are not used on your unit.) ATTACHING THE HANDLES Hex Bolts 710-04039 (2) Hex Bolts...

  • Page 6: Assembling Your Snow Thrower

    SECTION 3: ASSEMBLING YOUR SNOW THROWER NOTE: References to right or left side of the snow thrower are determined from behind the unit in the operating position. The “operator’s position” is defined as standing directly behind the snow thrower, facing the handle panel.
  • Page 7 Assembly (Crated Unit) WARNING: Disconnect the spark plug wire and ground it against the engine to prevent unintended starting. • Remove the lower two plastic wing knobs, cupped washers and carriage bolt (eyebolt on the left side) from the lower handle. See Figure 3. Wing Knobs, Washers and Bolts...
  • Page 8 • Insert curved end of the Z fitting into the top hole in the triangular metal tab on the auger control grip. The triangular metal tab on the auger control grip must face the center of the handle panel. See Figure 6. Auger Control Triangle Metal Tab...
  • Page 9 • Thread the ferrule onto the shift rod, up or down the shift rod and align with the far hole on the narrow side of the shift lever assembly behind the handle panel. See Figure 10. Shift Lever Auger Flat Washer Drive Ferrule...
  • Page 10 Attaching The Chute Directional Control (Hardware C) • Thread one hex nut about halfway onto eye bolt on the chute directional control. • Insert eye bolt through the hole provided in the left handle. See Figure 13. • Secure with cupped washer (cupped side against the handle) and other hex nut.

  • Page 11: Know Your Snow Thrower

    If your unit is not equipped with a lamp, contact Customer Support as instructed on page 2 for information regarding price and availability. SECTION 4: KNOW YOUR SNOW THROWER Traction Drive Clutch Gas Cap Discharge Oil Fill Chute Auger WARNING: Read, understand, and follow all instructions and warnings on the machine and in this manual before...

  • Page 12: Operating Your Snow Thrower

    • Crank clockwise to discharge to the left. • Crank counterclockwise to discharge to the right. Clean-Out Tool WARNING: Never use your hand to clear a clogged discharged chute. Shut off engine and remain behind handles until all moving parts have stopped before unclogging.
  • Page 13 WARNING: The optional electric starter is equipped with a grounded three-wire power cord and plug, and is designed to operate on 120 volt AC household current. It must be used with a properly grounded three-prong receptacle at all times to avoid the possibility of electric shock.

  • Page 14: Operating Tips

    Check the adjustment of the auger control as follows: • When the auger control is released and in the disengaged “up” position, the cable should have very little slack. It should NOT be tight. • In a well-ventilated area, start the snow thrower engine as instructed earlier in this section under the heading Starting Engine.

  • Page 15: Making Adjustments

    WARNING: The muffler, engine, and their surrounding areas become hot and can cause a burn. Do not touch. • Discharge snow downwind whenever possible. Slightly overlap each previous swath. SECTION 6: MAKING ADJUSTMENTS WARNING: Never attempt to make any adjustments while the engine is running, except where specified in operator’s manual.

  • Page 16: Chute Assembly

    • With the traction control is engaged, the friction wheel must contact the drive plate. See Figure 20. Friction Wheel Gear Shaft Drive Plate Figure 20 If adjustment is necessary: • Loosen the jam nut on the traction control cable and thread the cable in or out as necessary.

  • Page 17: Maintaining Your Snow Thrower

    NOTE: Make certain to check for correct adjustment of the shift rod as instructed in the Final Adjustments section before operating the snow thrower. Drive Wheels • The wheels may be adjusted for two different methods of operation. Follow the steps below for adjustment.

  • Page 18: Service

    Auger Shaft • At least once a season, remove shear bolts on auger shaft. Oil or spray lubricant inside shaft and lubricate the auger bearings. See Figure 24. Vent Plug Plastic Bearing Shear Bolts Figure 24 Drive and Shifting Mechanism Remove rear cover.

  • Page 19: Belt Removal And Replacement

    Augers • The augers are secured to the spiral shaft with two shear bolts and hex lock nuts. If you hit a hard foreign object or ice jam, the snow thrower is designed so that the bolts may shear. Refer to Figure 24. •...
  • Page 20 Drive Belt • Follow first four steps of previous instructions. • Pull idler pulley up, and lift belt off engine pulley and friction wheel disc. See Figure 28. • Using a wrench, loosen the nut on the stop bolt until the support bracket rests on the auger pulley.

  • Page 21: Troubleshooting

    • Run engine until fuel tank is empty and engine stops due to lack of fuel. • Drain carburetor by pressing upward on bowl drain, located below the carburetor cover. NOTE: Fuel stabilizer, or “Sta-Bil” (Included with certain units), is an acceptable alternative in minimizing the formation of fuel gum deposits during storage.

  • Page 22: Parts List

    SECTION 10: MODELS 614E, 644E, & 664G...
  • Page 23 Models 614E, 644E, & 664G REF. PART DESCRIPTION 712-0116 Lock Jam Nut 3/8-24 756-0178 Flat Idler 784-5632B Auger Idler Arm 710-0459A Hex Cap Screw 3/8-24 x 1.50 741-0475 Bushing 736-0242 Bell Washer 712-3010 Hex Nut 5/16-18 712-3027 Hex Lock Nut 1/4-20...
  • Page 24 Models 614E, 644E, & 664G 47†† 50†† 51†† 48†† 49†† 52†† 64† 60† †Models w/Folding Handles *Ref. Nos. 22 and 27 reversed for fold down handles. 65† 57† 59† 62† 58† 63† 61†...
  • Page 25 Models 614E, 644E, & 664G REF. PART DESCRIPTION 712-0116 Jam Lock Nut 3/8-24 732-0193 Compression Spring 736-0105 Bell Washer 784-5619A Shift Handle 710-0459A Hex Cap Screw 3/8-24 710-0788 Tap Screw 1/4-20 714-0104 Cotter Pin 720-0232 Shift Knob - Black 720-04030...
  • Page 26 Models 614E, 644E, & 664G Blower Housing Drive Clutch Cable Auger Clutch Cable 16” Wheels 13” or 15” Wheels 9 10 Auger Clutch Cable...
  • Page 27 Models 614E, 644E, & 664G REF. PART DESCRIPTION 710-0599 Hex Screw 784-5688 Drive Cable Guide Bracket 784-5687A Auger Clutch Cable Bracket 756-0625 Roller Cable 738-0924 Hex Screw 1/4-28 784-5630B Frame Assembly 741-0563 Ball Bearing 736-0105 Bell Washer 712-0116 Lock Jam Nut 10.
  • Page 28 614E Models REF. PART DESCRIPTION 710-1652 Hex Washer Screw 1/4-20 x.5 731-1324 Belt Cover 732-0339 Extension Spring 710-0627 Hex Screw 5/16-24 x.75 710-3005 Hex Cap Screw 3/8-16 x 1.25 05896A Drive Clutch Bracket 748-0234 Shoulder Spacer 756-0985 Pulley Half 754-0343 V-Belt 756-0984 Pulley Half...
  • Page 29 Models 644E & 664G REF. PART 710-1652 Hex Washer Screw 1/4-20 x.50 731-1324 Belt Cover 710-3005 Hex Cap Screw 3/8-16 x 1.25 732-0710 Extension Spring 710-0627 Hex Screw 5/16-24 x.75 05896A Drive Clutch Idler Bracket 748-0234 Shoulder Spacer 756-0987 Pulley Half...
  • Page 30 Models 614E, 644E, & 664G REF. PART 618-0123 Housing—R.H. 618-0124 Housing—L.H. 710-0642 Hex Screw 1/4-20 x.75 711-0908A Spiral Axle 24" 711-0910A Spiral Axle 28" 714-0161 715-0143 Spiral Pin 717-0526 Worm Shaft 717-0528 Worm Gear 718-0186 Thrust Collar SIZE REF. NO. 1 WHEEL ASS’Y...
  • Page 31 NOTES...
  • Page 32 MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its possessions and territories. “MTD”warrants this product against defects in material and workmanship for a period of two (2) years commencing on the...

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