Manual

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OPERATOR'S MANUAL

Model Series

993

Snow Thrower

IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY

Warning: This unit isequipped 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 368022 Cleveland, Ohio 44136-9722,

MTD PRODUCTS INC P.O. BOX 368022 CLEVELAND, OHIO 44136-9722

FORM NO. 770-10278

PRINTED IN U.S.A. (06/99)

Summary of content (24 pages)

PAGE 1
OPERATOR'S MANUAL Model Series 993 Snow Thrower 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 forestcovered, 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.
PAGE 2
SECTION 1: FINDING YOUR MODEL NUMBER This Operator's Manual is an important part of your new snow thrower. It will help you assemble, prepare and maintain your snow thrower. Please read and understand what it says. Before you start to prepare your snow thrower for its first use, please locate the model plate and copy the information from it in this Operator's Manual. The information on the model plate is very important if you need help from your dealer. • Every snow thrower has a model plate.
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SECTION 3: IMPORTANT SAFE OPERATION PRACTICES WARNING: 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 YOUR SNOW THROWER. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY. WHEN YOU SEE THIS SYMBOLHEED ITS WARNING.
PAGE 4
• If the snowthrowershouldstart to vibrate abnorma]ly, stoptheengine andcheckimmediately forthecause.Vibration is generally a warning of trouble. • Stopenginewhenever youleavethe operating position,beforeunclogging the collectodimpeller housingor discharge guide,and makingany repairs, adjustments, or inspections. Neverplace yourhandinthedischarge or collector openings. Usea stickorwooden broomhandle tounclog the discharge opening. • Takeallpossible precautions whenleaving theunit unattended.
PAGE 5
SECTION 4: SET-UP INSTRUCTIONS AUGER SHEAR BOLTS I_ -'1- 1A x 1 1"2" L n _;1;-0;90A'_ W ' The augers are secured to the auger shaft with two shear bolts o g and hex lock nuts. If you hita foreign object or ice jam, the snow " H" x L k N thrower is designed so that the bolts will shear. Two replacement _ Shear /_ Boltsle_ o¢__ uts shear bolts and nuts are provided for your convenience. Store in a _ _.
PAGE 6
FINAL ADJUSTMENTS Cable Guide Auger and Traction Control Clutch Adjustment To check the adjustment of either drive clutch, push forward on the clutch grip (depress the rubber bumper). There should be slack in the cable. Release the clutch grip. The cable should be straight, but not tight. Make certain you can depress the clutch grip against the handle completely. Figure 6 11.
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SECTION 5: CONTROLS Auger Drive_ Clutch Traction Control/ Chute Tilt Control TRIGGER LEVERS (See Figure 10) The trigger levers are located on the underside of the handles and are used to help you steer your snow thrower. To turn right, squeeze the right trigger lever and guide the snow thrower to the right. To turn left, squeeze the left trigger lever and guide the snow thrower to the left.
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SECTION 6: OPERATION NOTE: This unit has been shipped with oil in the engine. Check oil before starting engine. Metal on Plug Wire GAS AND OIL FILL-UP Check oil level and add oil if necessary. Service the engine with gasoline as instructed in the separate engine manual packed with your snow thrower. Read instructions carefully. Rubber Boot Figure 13 ENGINE WILL NOT START _ with the engineNever running is WARNING: fill or fuelwhile tank engine indoors, hot. Do not smoke when filling fuel tank.
PAGE 9
TO STOP ENGINE TIRE CHAINS 1. Run engine for a few minutes before stopping to help dry off any moisture on the engine. Tire chains should be used whenever extra traction is needed. 2. To help prevent possible freeze-up of starter, proceed as follows: Optional Electric Starter Connect power cord to switch box on engine, then to 120 volt AC receptacle. With the engine running, push starter button and spin the starter for several seconds.
PAGE 10
SHIFT ROD ADJUSTMENT CARBURETOR To adjust the shift rod, remove the cotter pin which secures the shift rod to the shift lever. For proper adjustment, refer to FINAL ADJUSTMENTS on page 6. A ,_. ADJUSTMENT WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), keep clear of all moving parts. Be careful of heated surfaces and mufflers.
PAGE 11
SECTION 9: MAINTENANCE BELT REMOVAL _1_ wire and ground againstthe the engine WARNING: Disconnect spark plug before performing any repairs or maintenance. WARNING: Remove the spark plug wire from the spark plug and ground. Drain gasoline from the fuel tank, or place a piece of plastic film underneath the gas cap to prevent gasoline from leaking. AUGERS The augers are secured to the spiral shaft with two shear bolts and hex lock nuts. See Figure 16.
PAGE 12
/En " Pulley Brake Bracket _ Bolt tt! uger Control uelt Pull, Spring Figure 18 Auger Idler Rod Figure 21 Proper Adjustment With the auger clutch lever in the disengaged position the top surface of the new belt should be even with the outside diameter of the BrakeJ Bracket Assembly pulley. To adjust, disconnect ferrule from the brake bracket assembly and thread ferrule in (towards idler) to increase tension on belt, out to decrease tension.
PAGE 13
Changing the Friction Wheel The rubber on the friction wheel is subject to wear and should be checked after 25 hours of operation, and periodically thereafter. Replace the friction wheel rubber if signs of excessive wear or cracking are found. 1. Drain the gasoline from the snow thrower, or place a piece of plastic under the gas cap. 2. Tip the snow thrower up and forward, so that it rests on the housing. 3. Remove six self-tapping screws from the frame cover underneath the snow thrower. 4.
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SECTION 11: TROUBLE SHOOTING Trouble Possible Engine fails to start Fuel tank empty, or stale fuel. Engine runs erratic Cause(s) Blocked fuel line. Choke not in ON position Faulty spark plug. Key not in switch on engine. Spark plug wire disconnected. Primer button not depressed. Fuel shut-off valve closed Unit running on CHOKE. Blocked fuel line or stale fuel. Water or dirt in fuel system. Carburetor out of adjustment.
PAGE 15
SECTION 12: Illustrated Parts Model 993 4 2 J 6 12 10 Ref. No. 1 2 3 4 6 7 8 9 10 11 12 Part No. 731-1364 710-1240 712-0271 725-1669 629-0059 725-1658 710-0451 710-1003 736-0159 712-0429 731-1873A 735-0225 705-5217 Description Halogen Lamp Housing Phillips Pan Head Screw M 4 x 16 Hex Sems Nut 1/4-20 Lamp/Lens Housing Ass'y Halogen Light Wire Harness #890 Halogen Bulb Cardage Bolt 5/16-18 x .75 Pan Head B-Tapp Screw #10 FI-Wash .344 ID x .88 OD Hex ins L-Nut 5/16-18 Handle Panel Grommet .38 ID x .
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Model 993 8 \ 15 64 \ 75 66 24 X 23j _ 65 "66 62 37 47 36 ,/ 43 39 42 _35 "37 16
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Model 993 Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 34 35 36 37 39 40 41 42 43 44 45 47 Part No. 720-0232 705-5218 705-5219 710-0351 710-0599 711-0653 712-3010 714-0507 732-0145 732-0746 735-0199A 736-0119 736-0509 747-0877 748-0362 748-0363 784-5679 784-5680 784-5681 784-5682 684-0102 710-0459A 712-0116 732-0193 736-0105 784-5619A 710-0458 710-0276 710-0458 710-0805 710-0896 712-0429 731-0846C 731-1313C 731-0903D 731-1319 736-0159 736-0231 736-0506 Description Qty.
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Model 993 !6 26 98 59 63 105 \\11 \ 56 73 ? 82 18 84
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Model 993 Ref. No. 1 2 4 6 8 15 16 17 19 20 23 Part No. 736-0159 710-3015 736-0105 731-0903D 784-5711 784-5123 731-1696 736-0242 712-3027 731-0851A 710-0601 26 28 29 30 31 32 33 34 38 45 46 52 53 54 56 58 59 60 710-0371 756-0243 714-0126 741-0185 712-3010 736-0119 05244A 711-0640 710-0451 684-0093A 784-5714 710-3168 710-0389 784-5710 712-0798 715-0118 684-0090 784-5076 61 63 64 65 67 68 69 70 71 721-0325 738-0491 721-0146 719-0348 714-0126 711-1133 716-0111 721-0145 741-0217 Description Qty.
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Model 993 \ J / 20
PAGE 21
Model 993 Ref. No. 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 Part No. 629-0071 710-0502A 710-0607 731-0321-1 736-0264 712-3006 732-0705 736-0173 736-0329 07386 710-0191 710-0237 710-0459 710-1245 712-0116 Description Extension Cord 10 Ft. Hex L-wash Tt Scr 3/8-16 X 1.25 Hwhd 5/16-18 X 1/2 Thd Roll Zn Belt Cover - Pierced FI-wash .344 ID X .625 OD X .063 Nut 1/4-20 GR B Hex Cable Control Wire FI-Wash .28 ID x .74 OD x .063 Lock Washer 1/4 Wash .39 ID X 1.75 OD X .175 T Scr Hex Cap 3/8-24 X 1.
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Model 993 76 o\ 54 57 18 <: 47 7O 48 29 22
PAGE 23
Model 993 Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 23 24 25 26 27 28 29 32 33 34 35 36 37 38 39 40 41 42 Part No.
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MANUFACTURER'S LIMITED WARRANTY FOR: YaRD-MaNY,f/ The limited warranty set forth below is given by MTD PRODUCTS INC ("MTD") 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 date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in material or workmanship.