MTD 770-10278 993 Operator'S Manual Download Page 3

 3

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 SYMBOL-
HEED ITS WARNING.

WARNING: 

The Engine Exhaust from this product contains chemicals known to

the State of California to cause cancer, birth defects or other reproductive harm.

DANGER: 

Your snow thrower was built to be operated according to the rules for safe operation in

this manual. As with any type of power equipment, carelessness or error on the part of the operator
can result in serious injury. If you violate any of these rules, you may cause serious injury to yourself
or others.

1.  TRAINING

• Read this operator's manual carefully in its entirety

before attempting to assemble or operate this
machine. Be completely familiar with the controls
and the proper use of this machine before
operating it. Keep this manual in a safe place for
future and regular reference and for ordering
replacement parts.

• Never allow children under 14 years old to operate

a snow thrower. Children 14 years old and over
should only operate snow thrower under close
parental supervision. Only persons well acquainted
with these rules of safe operation should be
allowed to use your snow thrower.

• No one should operate this unit while intoxicated or

while taking medication that impairs the senses or
reactions.

• Keep the area of operation clear of all persons,

especially small children and pets.

• Exercise caution to avoid slipping or falling,

especially when operating in reverse.

2.  PREPARATION

• Thoroughly inspect the area where the equipment

is to be used and remove all door mats, sleds,
boards, wires and other foreign objects.

• Disengage all clutches before starting engine.

• Do not operate equipment without wearing

adequate winter outer garments. Do not wear
jewelry, long scarfs or other loose clothing which
could become entangled in moving parts. Wear
footwear which will improve footing on slippery
surfaces.

• Before working with gasoline, extinguish all

cigarettes and other sources of ignition. Check the
fuel before starting the engine. Gasoline is an
extremely flammable fuel. Do not fill the gasoline
tank indoors, while the engine is running, or until
engine has been allowed to cool at least two
minutes. Replace gasoline cap securely and wipe
off any spilled gasoline before starting the engine
as it may cause a fire or explosion.

• Use a grounded three wire plug-in for all units with

electric drive motors or electric starting motors.

• Adjust collector housing height to clear gravel or

crushed rock surface.

• Never attempt to make any adjustments while

engine is running (except where specifically
recommended by manufacturer).

• Let engine and machine adjust to outdoor

temperature before starting to clear snow.

• Always wear safety glasses or eye shields during

operation or while performing an adjustment or
repair, to protect eyes from foreign objects that may
be thrown from the machine in any direction.

3.  OPERATION

• Do not put hands or feet near or under rotating

parts. Keep clear of discharge opening and auger
at all times.

• Exercise extreme caution when operating on or

crossing gravel drives, walks, or roads. Stay alert
for hidden hazards or traffic. Do not carry
passengers.

• After striking a foreign object, stop the engine,

remove wire from spark plug, and thoroughly
inspect the snow thrower for any damage. Repair
the damage before restarting and operating the
snow thrower.

Summary of Contents for 770-10278 993

Page 1: ...ss 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 arrest...

Page 2: ...R SUPPORT LOCATE YOUR MODEL NUMBER AND SERIAL NUMBER Record this information in the space provided To find your unit s specific model number and serial number see SECTION 1 FINDING YOUR MODEL NUMBER If you are having difficulty assembling this product or if you have any questions regarding the controls operation or maintenance of this unit please call the Customer Support Department Customer Suppo...

Page 3: ...ly when operating in reverse 2 PREPARATION Thoroughly inspect the area where the equipment is to be used and remove all door mats sleds boards wires and other foreign objects Disengage all clutches before starting engine Do not operate equipment without wearing adequate winter outer garments Do not wear jewelry long scarfs or other loose clothing which could become entangled in moving parts Wear f...

Page 4: ...tor impeller when transporting or not in use Use only attachments and accessories approved by the manufacturer of snow thrower such as wheel weights counter weights cabs etc Never operate the snow thrower without good visibility or light Always be sure of your footing and keep a firm hold on the handles Walk never run Muffler and engine become hot and can cause a burn Do not touch 4 MAINTENANCE AN...

Page 5: ... 4 8 Secure the upper handle and lower handle with the two plastic wing nuts cupped washers and carriage bolts previously removed See Figure 4 9 Slide the shift rod connector down over the end of the lower shift rod See Figure 5 Tap the connector until it locks on the lower shift rod NOTE If the connector is not properly assembled the shift rod will pivot and you will not be able to shift gears or...

Page 6: ...justment See Figure 8 The space between the shave plate and the ground can be adjusted For close snow removal place skid shoes in the low position Use middle or high position when area to be cleared is uneven See Figure 8 Adjust skid shoes by loosening the six hex nuts and carriage bolts and moving skid shoes to desired position Make certain the entire bottom surface of skid shoe is against the gr...

Page 7: ... 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 These controls should be used while operating your snow thrower in open areas until you become familiar with their operation Lift both triggers for easy transport when the engine is not running CHUTE DIRECTIONAL CONTROL See Figure 10 The chute directio...

Page 8: ... inside the boot is fastened securely over the metal tip on the spark plug See Figure 13 2 Make certain the auger and traction control clutch levers are in the disengaged released position 3 Move throttle control up to FAST position Insert ignition key into slot Refer to Figure 12 Be certain it snaps into place Do not turn key 4 Rotate choke knob to OFF position Figure 13 Figure 14 5 Connect power...

Page 9: ...sing the traction control clutch TIRE PRESSURE Pneumatic tires only Tires are over inflated for shipping purposes Correct tire pressure is 10 15 psi Check sidewall of tire for manufacturer s recommendation TIRE CHAINS Tire chains should be used whenever extra traction is needed OPERATING TIPS NOTE Allow the engine to warm up for a few minutes as the engine will not develop full power until it reac...

Page 10: ... mechanism at least once a season Use engine oil or a spray lubricant Avoid getting oil on rubber friction wheel and aluminum drive plate CHUTE DIRECTIONAL CONTROL WORM The worm gear on the chute directional crank should be greased with multi purpose automotive grease IMPELLER PULLEY The impeller pulley should be lubricated once a season Refer to exploded view of parts found in the back of the boo...

Page 11: ...lts are to the inside of the housing Tighten securely BELT REMOVAL AND REPLACEMENT 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 Auger Belt To remove and replace either the auger belt or the drive belt proceed with the following instructions 1 Disconnect ch...

Page 12: ...always be firmly seated in the pulley groove when the auger clutch lever is in the disengaged position Drive Belt 1 Unhook extension spring from the belt cover plate See Figure 18 2 Remove drive belt from the engine pulley and bottom drive pulley 3 Replace belt and reassemble in reverse order 4 Reassemble the two halves of the unit hooking the lower portion of the auger housing over the stationary...

Page 13: ... and slide the shaft through the friction wheel See Figure 23 9 Slide the hex shaft into the hex I D of the sprocket the spacer and the left ball bearing and secure with the bell washer and hex bolt NOTE Make sure the pin from the shift arm assembly is assembled to the new friction wheel assembly CAUTION Check engine and snow thrower frequently for loose nuts bolts etc and keep these items tighten...

Page 14: ... of power Spark plug wire loose Gas cap vent hole plugged Exhaust port plugged Connect and tighten spark plug wire Remove ice and snow from cap Be certain vent hole is clear Clean see Maintenance section of engine manual Engine overheats Carburetor not adjusted properly Refer to the engine manual packed with your unit or have carburetor adjusted by an authorized service dealer Excessive vibration ...

Page 15: ...ms Nut 1 4 20 1 4 725 1669 Lamp Lens Housing Ass y 1 629 0059 Halogen Light Wire Harness 1 725 1658 890 Halogen Bulb 1 6 710 0451 Carriage Bolt 5 16 18 x 75 1 7 710 1003 Pan Head B Tapp Screw 10 2 8 736 0159 Fl Wash 344 ID x 88 OD 1 9 712 0429 Hex Ins L Nut 5 16 18 1 10 731 1873A Handle Panel 1 11 735 0225 Grommet 38 ID x 50 OD x 12 1 12 705 5217 Lamp Mounting Bracket 1 ...

Page 16: ... 24 25 26 34 35 36 37 39 39 40 41 42 43 44 45 44 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 66 67 70 72 73 74 43 39 48 49 41 48 1 68 75 75 8 8 7 12 13 11 68 65 71 81 79 80 68 68 71 84 85 85 84 86 63 69 62 62 69 63 76 77 78 83 82 83 27 27 72 37 64 66 82 27 27 7 12 12 75 ...

Page 17: ...racket Chute Tilt 1 51 784 5604 Chute Tilt Handle 1 52 684 0053A Lower Chute Directional Control 1 53 710 3015 Hex Scr 1 4 20 x 75 Lg Gd5 1 54 712 0287 Hex Nut 1 4 20 1 55 720 0201A Chute Directional Control Knob 1 56 726 0100 Push Cap 3 8 Palnut 375011 1 57 736 0117 Flat Washer 38 ID x 60 OD x 033 1 58 736 0270 Bell Wash 26 ID x 75 OD x 06T 1 59 747 0624 Upper Chute Directional Control 1 60 705 5...

Page 18: ...18 Model 993 8 ...

Page 19: ... 73 736 0291 Flat Washer 88 ID x 1 4 OD x 125 3 74 717 0299 Worm Gear LH Double Thread 1 75 741 0670 Flange Brg 1 5 ID x 1 75 OD x 80 2 76 736 0266 Flat Washer 1 5 ID x 2 0 OD x 03 2 77 717 1425 Worm Gear LH Double Thread Bronze 1 78 738 0275 Worm Gear Shaft 1 79 714 0135 91 Woodruff Key 1 4 x 3 4 dia 1 80 719 0349 Gear Housing Half LH 1 81 710 1260A Hex Flange Scr 5 16 18 x 75 7 82 712 0429 Hex I...

Page 20: ...20 Model 993 ...

Page 21: ...Gr 5 1 16 712 0116 Hex Ins L nut 3 8 24 1 17 714 0118 Square Key 1 4 X 1 5 1 18 732 0303 Extension Spring 38 OD X 3 18 L 1 19 736 0169 L wash 3 8 1 20 736 0217 Lock Washer 3 8 Heavy 1 21 736 0242 Bell Wash 345 ID X 88 OD X 060 4 22 737 0157 Grease Sunaplex 781 1 10 1 23 738 0215A Shoulder Scr 498 Dia X 3 0 Lg 1 24 748 0234 Shldr Spcr 50 Dia X 14 Shldr 1 25 754 0131 3v Belt 35 5 Lg 1 26 756 0240 3 ...

Page 22: ... 13 50 14 15 78 16 17 17 1 19 20 12 23 22 22 22 23 24 24 25 26 27 28 71 29 34 34 32 32 33 33 34 35 36 36 37 38 39 38 38 76 47 47 50 19 48 49 49 49 49 50 51 51 52 53 53 54 54 55 80 80 56 53 53 58 57 57 59 60 61 61 62 62 63 64 65 66 67 68 68 69 70 28 72 73 74 75 19 47 56 82 81 ...

Page 23: ...ing 1 46 732 0209 Extension Spring 2 47 736 0119 Lock Washer 5 16 7 48 736 0158 Lock Washer 5 8 1 49 736 0160 Wash Fl 531 ID x 930 OD x 05 4 50 736 0163 Wash Fl 1 03 ID x 1 62 OD 4 51 736 0300 Wash Flt 1 4 ID x 930 OD x 12 2 52 736 0623 Wash Flt 640 ID x 1 24 OD x 06 1 53 736 0217 Lock Washer 3 8 Heavy 4 54 736 0242 Bell Wash 345 ID x 88 OD 2 55 736 0275 Fl wash Sae 34 x 68 062 1 56 736 0329 Lock ...

Page 24: ...arate manufacturer s warranty Please refer to the applicable manufacturer s warranty on these items b Routine maintenance items such as lubricants filters blade sharpening and tune ups or adjustments such as brake adjustments clutch adjustments or deck adjustments and normal deterioration of the exterior finish due to use or exposure c Log splitter pumps valves and cylinders have a sepa rate one y...

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