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Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty
OPERATOR’S MANUAL
Two-Stage Snow Thrower – Models 3AA & 3BA
IMPORTANT
READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION
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
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This Operator’s Manual is an important part of your new snow thrower. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says. Table of Contents 1. Safety Labels ............................................... 3 6. Adjustments & Maintenance .................... 12 2. Safe Operation Practices ............................ 4 7. Off-Season Storage ................................... 14 3. Setting Up Your Snow Thrower ............
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1 Safety � � � � � � � � � �� � � � � � � � � ��� � � � � � � � � � � Labels � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ����������������������������������� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �����������
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WARNING: Engine Exhaust, some of its constituents, and certain vehicle compo- nents contain or emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm. 2 DANGER: This machine 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. This machine is capable of amputating hands and feet and throwing objects
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Operation Maintenance & Storage 1. Do not put hands or feet near rotating parts, in the 1. Never tamper with safety devices. Check their proper auger/impeller housing or chute assembly. Contact with the operation regularly. Refer to the maintenance and adjust- rotating parts can amputate hands and feet. ment sections of this manual. 2 2. The auger/impeller control lever is a safety device. Never 2. Before cleaning, repairing, or inspecting machine disen- bypass its operation. Doing so makes the
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IMPORTANT: This unit is shipped with the engine full of oil. After assembly, see page 9 for fuel and oil details. Chute Handle Before Assembly WARNING: Disconnect the spark plug 3 wire and Ground it against the engine to prevent unintended starting. 2 Setup And NOTE: Reference to right, left, front or rear of the unit is from the operating position unless otherwise stated. Adjustment 1. Cut the cable tie that secures the upper handle to 1 the chute assembly for shipping purposes. Settin
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Skid Shoe The space between the shave plate and the ground can be adjusted. Refer to Figure 7 for location of shave plate and skid shoes. 3 For close snow removal, place skid shoes in the low High Position position. When the area to be cleared is uneven, place Setup And Middle Position skid shoes in the middle or high position. See Figure 4. Low Position NOTE: It is not recommended that you operate this Adjustment snow thrower on gravel as loose gravel can be easily picked up and thrown b
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WARNING: Be familiar with all the controls on the snow thrower and their proper operation. Know how to stop the machine and disengage them quickly. Compare Figure 7 with your equipment and follow description of controls, given below, to get familiar with their operation. Upper Handle 4 Drive Control Auger Control Know Starter Rope Your Snow Gasoline Cap Chute Handle Thrower Upper Chute Chute Knob Chute Assembly Muffler Oil Fill Fuel Cap Spark Clean-Out Tool Plug Carburetor Cover WARNING Be
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and free from rust or other foreign particles. Make Before Starting Engine sure to wipe off any spilled fuel before starting the Engine Oil engine. The engine is shipped with oil in it. Check the oil level 6. At the end of the job, empty the fuel tank if the snow before first use. 5 thrower is not going to be used for 30 days or longer. 1. Stop engine and wait several minutes before checking Store gasoline in a clean container and keep the cap oil level. Remove oil fill cap and dipstick.
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14. Disconnect the power cord from the receptacle first Electric Starter(if equipped) and then from the switch box on the engine. Some models of the snow thrower may be equipped 15. Allow the engine to warm up for a few minutes with an optional 120 volt A.C. electric starter. This because the engine will not develop full power until it electric starter, with a three-wire power cord and plug, is 5 reaches operating temperature. designed to operate on 120 volt AC household current. Follow t
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WARNING: Do not over-tighten the Operating Tips cable. Over-tightening may prevent the 1. For most efficient snow removal, remove snow auger from disengaging and compro- immediately after it falls. mise the safety of the snow thrower. 2. Discharge snow downwind whenever possible. 5 2. In a well-ventilated area, start the snow thrower Slightly overlap each previous swath. engine as instructed earlier in this section under the 3. Set the skid shoes 1/4” below the shave plate for heading Star
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General Recommendations Shear Pin 1. Always observe safety rules when performing any Cotter Pin maintenance. Skid Shoe 2. The warranty on this snow thrower does not cover 6 items that have been subjected to operator abuse or negligence. To receive full value from the war- ranty, operator must maintain the snow thrower as Maintenance instructed in this manual. & Service 3. Periodically check all fasteners and hardware to Carriage make sure these are tight. Bolt WARNING: Before servicing, re
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Replacing Belts NOTE: There are two belts on this snow thrower: an auger belt and drive belt. It is recommended that both belts be replaced at the same time. 6 1. Remove the spark plug wire from spark plug and ground it against the engine to prevent accidental starting. Maintenance 2. Drain gasoline from the gas tank, or place a piece of plastic sheet underneath the gas cap to prevent & Service gasoline leakage. WARNING: Perform belt maintenance outdoors as some gas may possibly leak fr
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If the snow thrower will not be used for 30 days or WARNING: Do not drain carburetor if longer, or if it is the end of the snow season when the using fuel stabilizer. Never use engine or last possibility of snow is gone, the equipment needs to carburetor cleaning products in the fuel be stored properly. Follow storage instructions below to tank or permanent damage may occur. 7 ensure top performance from the snow thrower for many NOTE: Fuel stabilizer (such as STA-BIL) is an accept- more yea
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Problem Possible Cause(s) Solution 1. Fuel tank empty, or stale fuel 1. Fill tank with clean fresh gasoline. Engine fails to start 2. Blocked fuel line 2. Clean fuel line 8 3. Key not snapped in place 3. Insert key. See “Ignition Key” on Page 8. 4. Spark plug wire disconnected 4. Connect wire to spark plug. Trouble- 5. Faulty spark plug 5. Clean spark plug, readjust gap, or replace. Shooting 6. Engine not primed 6. Prime engine four times. 7. Wait at least ten minutes before 7
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7 9 4 8 Part List: 3 6 2 Dual Stage 9 5 Snow 12 10 Thrower 1 13 14 22 32 16 47 33 11 18 15 28 27 34 38 26 17 20 For parts and/or 30 20 31 accessories 24 21 please call 3 46 1-800-800-7310, or 1-330-220-4683. 3 3 www.mtdproducts.com 19 45 20 20 37 25 23 35 40 42 36 43 41 29 44 39 16
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9 Part List: Dual Stage Snow Thrower REF PART DESCRIPTION Qty. REF PART DESCRIPTION Qty. NO. NUMBER NO. NUMBER 1 684-04037 Chute Assembly 1 24 726-04012 Push On Nut 2 2 710-04071 Carriage Bolt 5/16-18 x 1.0” 1 25 731-04218B Impeller 1 3 710-0451 Carriage Bolt 5/16-18 11 26 732-0611 Extension Spring 1 4 712-3068 Flange Lock Nut, 5/16-18 1 27 736-0174 Wave Washer 1 5 720-0284 Wing Nut 5/16-18 (black) 1 28 738-0281 Shoulder Screw 3/8-16 1 For parts and/or 720-04032 Wing Nut 5/16-18 (yellow) 1 2
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38 42 53 52 9 54 10 51 8 12 46 48 4 51 47 51 2 49 51 43 40 41 7 11 44 5 55 50 45 13 1 3 27 16 30 16 33 6 15 17 28 32 26 24 31 15 37 14 4 29 25 19 23 18 39 22 20 36 21 34 35 18
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9 Part List: Dual Stage Snow REF PART DESCRIPTION Qty. REF PART DESCRIPTION Qty. Thrower NO. NUMBER NO. NUMBER 1 710-0449 Carriage Screw 5/16-18 x 2.25” 2 28 741-0245 Hex Flange Bearing 2 2 710-0605 Mach. Screw 1/4-20 x 1.825” 1 29 741-04108 Hex Flange Bearing 2 3 710-1260A Screw, 5/16-18 x .75” 4 30 756-0625 Cable Roller 1 4 712-04064 Flange Lock Nut 1/4-20 2 31 784-0419B Drive Housing Frame 1 5 720-0284 Nut Knob 5/16-18 (Black) 2 32 790-00223 Auger Cable Bracket 1 720-04032 Nut Knob 5/16-1
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MANUFACTURER’S LIMITED WARRANTY FOR The limited warranty set forth below is given by MTD LLC with respect to e. MTD does not extend any warranty for products sold or exported new merchandise purchased and used in the United States, its posses- outside of the United States, its possessions and territories, except sions and territories. those sold through MTD’s authorized channels of export distribution. “MTD” warrants this product against defects in material and workmanship f. Replacement par
