MTD 770-10278 993 Operator'S Manual Download Page 7

 7

SECTION 5:  CONTROLS

Figure 10  

SHIFT LEVER 

(See Figures 10 and 11)
The shift lever is located in the center of
the handle panel. The shift lever may be
moved into one of eight positions. Run
engine with throttle in the fast position.
Use the shift lever to determine ground
speed.

Forward—

one of six speeds. Position

number one (1) is the slowest. Position
number six (6) is the fastest.

Reverse—

two reverse (R) speeds. “R”

closest to the operator (all the way back)
is the faster of the two.

Figure 11

AUGER CONTROL 

(See Figure 10)

The auger control clutch is located on the left
handle. Squeeze the clutch grip to engage the
augers. Release to stop the snow throwing action.
(Traction control clutch must also be released.)

TRACTION CONTROL/AUGER CLUTCH 
LOCK

(See Figure 10)
The traction control clutch is located on the right
handle. Squeeze the traction control clutch to
engage the wheel drive. Release to stop.
This same lever also locks the auger clutch so you
can turn the chute directional control without
interrupting the snow throwing process. If the auger
control clutch is engaged with the traction control
clutch engaged, the operator can release the auger
control clutch (on the left handle) and the augers will
remain engaged. Release the traction control clutch
to stop both the augers and wheel drive (auger
control clutch must also be released).

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. 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 directional control is located on left hand
side of the snow thrower.
To change the direction in which snow is thrown,
turn chute directional control as follows:

1.

Crank clockwise to discharge to the left.

2.

Crank counterclockwise to discharge to the right.

CHUTE TILT CONTROL 

(See Figure 10)

The distance snow is thrown can be adjusted by
adjusting the angle of the chute assembly. Move the
chute tilt control forward to decrease the distance,
toward the rear to increase.

HEADLIGHT 

(See Figure 10)

The headlight is on whenever the engine is running.

THROTTLE CONTROL 

(See Figure 12)

The throttle control is located on the engine. It
regulates the speed of the engine.

SAFETY IGNITION SWITCH 

(See Figure 12)

The ignition key must be inserted in the switch
before the unit will start. Remove the ignition key
when snow thrower is not in use.

FUEL SHUT-OFF VALVE

The fuel shut-off valve, located
under fuel tank, controls fuel
flow from tank.

Figure 12  

Auger

Drive

Clutch

Chute

Tilt

Control

Shift

Lever

Chute

Directional

Left

Trigger

Lever

Right

Trigger

Lever

Headlight

Shift

Lever

Traction Control/

Auger Clutch

Lock

Control

Open

Closed

Muffler

Guard

Primer

Choke

Carburetor

Cover

Ignition

Key

Control

Lever

Oil Drain

Plug

Starter

Handle

Fuel

Tank

Fuel Fill

Cap

Oil Fill Plug

Muffler

Electric

Starter

Button

(If Equipped)

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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