Summary of the content on the page No. 1
Operator’s Manual
Single Stage
Snow Thrower
Model 421R
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 ope
Summary of the content on the page No. 2
TABLE OF CONTENTS Content Page Important Safe Operation Practices .................................................................. 3 Assembling Your Snow Thrower ....................................................................... 5 Know Your Snow Thrower................................................................................. 7 Operating Your Snow Thrower.......................................................................... 8 Making Adjustments..................................
Summary of the content on the page No. 3
SECTION 1: 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 this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol—heed its warning. WARNING: Engine Exhaust, some of its constituents, and certain vehicle components con
Summary of the content on the page No. 4
6. Do not operate machine while under the influence of Maintenance And Storage alcohol or drugs. 1. Never tamper with safety devices. Check their proper 7. Muffler and engine become hot and can cause a burn. Do operation regularly. not touch. 2. Disengage all clutch levers and stop engine. Wait until 8. Exercise extreme caution when operating on or crossing the auger/impeller come to a complete stop. Disconnect gravel surfaces. Stay alert for hidden hazards or traffic. the spark plug wi
Summary of the content on the page No. 5
SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking From Carton Before Assembly Cut along corners of the carton and lay it down flat. WARNING: Disconnect the spark plug wire See Figure 1. Remove packing material. and ground it against the engine to prevent Remove any loose parts included with unit (i.e., unintended starting. operator’s manual, etc.). Roll unit out of carton. Check carton thoroughly for Raising Upper Handle any remaining loose part. Loosen the hand knob on each side of
Summary of the content on the page No. 6
Lift the control handle up, and hook the “Z” end of Secure eyebolt with 5/16” saddle washer and hex the control cable into the bottom hole in the control nut. The cupped side of washer goes against the handle, from the outside to the inside . If necessary, handle. Adjust lower hex nut until the eyebolt is pull up on the end of the cable with a pair of pliers to positioned so that the chute crank turns freely obtain slack in order to hook it into the control (does not bind). handle. Hold
Summary of the content on the page No. 7
SECTION 3: KNOW YOUR SNOW THROWER Be familiar with all the controls and their proper operation. Know how to stop the machine and disengage them quickly. Compare Figure 9 with the controls on your snow thrower before starting the machine or trying to operate it. Auger Control Upper Handle Handle Chute Crank Ignition Spark Primer Key Plug Button Cover Discharge Chute Starter Handle Choke Lever Off On Shave Plate Auger Figure 9 upper handle to engage the augers; release to Choke Lever d
Summary of the content on the page No. 8
SECTION 4: OPERATING YOUR SNOW THROWER After making sure no bystanders or obstacles are in Before Starting front of the unit, engage the auger control handle. See Figure 11. As the snow thrower starts to move, WARNING: Read, understand, and follow maintain a firm hold on the handle, and guide the all instructions and warnings on the machine snow thrower along the path to be cleared. and in this manual before operating. Release the auger control handle to stop the snow The spark plug
Summary of the content on the page No. 9
SECTION 5: MAKING ADJUSTMENTS WARNING: NEVER attempt to make any Belt Tension adjustments while the engine is running, except Periodic adjustment of the belt tension may be required where specified in the operator’s manual. due to normal stretch and wear on the belt. If augers hesitate while turning although engine maintains same Shave Plate speed, adjust tension following instructions below. To check the adjustment of the shave plate, place The upper hole in the control handle provi
Summary of the content on the page No. 10
SECTION 6: MAINTAINING YOUR SNOW THROWER Pull up on the idler pulley and slip the belt off the WARNING: Before servicing, repairing, or engine pulley. inspecting, disengage all clutch levers and Push down on the idler pulley and slip the belt off stop engine. Wait until all moving parts have the auger pulley. come to a complete stop. Disconnect spark Reassemble new belt. See Figure 17. plug wire and ground it against the engine to Reinstall the belt cover. prevent unintended starti
Summary of the content on the page No. 11
Lubrication Engine Lubricate pivot points on the control handle and the Refer to the separate engine operator’s manual extension spring at the end of the clutch cable with packed with your snow thrower for all engine a light oil once every season and before storage of maintenance procedures. the snow thrower at the end of the season. Check engine and snow thrower frequently for loose hardware, and tighten as needed. SECTION 7: OFF-SEASON STORAGE Follow “Storage” instructions in the
Summary of the content on the page No. 12
SECTION 8: TROUBLESHOOTING GUIDE Problem Cause Remedy Engine fails to start 1. Fuel tank empty, or stale fuel 1. Fill tank with clean fresh gasoline/oil mixture as specified in the engine manual. 2. Blocked fuel line 2. Clean fuel line 3. Key not in ON position 3. Insert key and turn to ON position 4. Spark plug wire disconnected 4. Connect wire to spark plug. 5. Faulty spark plug 5. Clean spark plug, readjust gap, or replace. 6. Gasoline and oil not mixed correctly 6. Refer to engine manual
Summary of the content on the page No. 13
SECTION 9: PARTS LIST FOR MODEL 421R 5 9 10 4 2 3 7 8 6 1 4 7 Ref. No. Part No. Description 710-0487 Carriage Screw 1. 710-1270 Oval C-Sunk Machine Screw 2. 3. 712-0324 Hex Lock Nut 720-0284 Wing Nut 4. 720-0295 Foam Grip: Handle 5. 6. 725-0157 Cable Tie 736-0451 Saddle Washer 7. 746-0883 Cable Housing w/o Throttle 8. 9. 747-0956 Auger Bail: Gull Wing 749-0711A Upper Handle: Gull Wing 10. NOTE: For painted parts, please refer to the list of color codes below. Please add the applicable color co
Summary of the content on the page No. 14
SECTION 10: Model 421R 19 26 11 16 26 2 4 18 33 15 17 9 7 28 22 35 5 25 6 42 45 30 13 44 6 21 38 22 37 10 31 46 3 34 7 1 13 30 35 23 32 12 6 20 40 14 27 39 8 36 41 14
Summary of the content on the page No. 15
Model 421R Ref. No. Part No. Part Description Ref. No. Part No. Part Description 1. 710-0167 Carriage Bolt 25. 736-0176 Flat Washer 2. 710-0276 Carriage Bolt 26. 736-0159 Washer 3. 710-0323 Pan Head Screw 27. 736-0326 Flat Washer 4. 710-0451 Carriage Bolt 28. 736-0329 Lock Washer 5. 710-0642 Hex Washer Screw 30. 741-0600 Ball Bearing 6. 710-1005 Hex Washer Screw 31. 746-0910A Cable—Clutch 7. 710-0773 Hex Washer Screw 32. 748-0234 Spacer 8. 710-0896 Hex Washer Screw 33. 749-0796 Handle—Lower 9.
Summary of the content on the page No. 16
Model 421R 17 11 28 21 10 26 7 25 2 27 7 9 23 8 6 13 15 14 19 29 4 22 24 18 7 3 16 5 5 20 16
Summary of the content on the page No. 17
Model 421R Ref. No. Part No. Part Description 684-0054A Dash Assembly 1. 684-0126 Chute Crank Assembly 2. 710-1003 Special Screw: 310-16 x 0.375” 3. 710-1090 Hex Flange Screw 5/16-18 x 1.25” 4. 710-1268 Special screw 5. 710-1652 Self-Tapping Screw 1/4-20 x .625” 6. 712-3010 Hex Nut 5/16-18 7. 714-0104 Hairpin Clip 8. 714-0507 Cotter Pin 9. 715-0138 Roll Pin 10. 720-0201A Chute Crank Knob 11. 725-0201 Ignition Key 12. 725-1341B Ignition Key w/o Logo 13. 725-1346 Ignition Switch Nut 14. 725-1347 I
Summary of the content on the page No. 18
Model 421R 14 7 13 4 10 6 11 3 4 10 12 6 1 Ref. No Part No. Description 8 705-5139A Support Bracket: Gas Tank 1. 710-0157 Hex Bolt 5/16-24 x .75” 2. 710-1652 Self-Tapping Screw 3. 5 710-3013 Hex Screw 1/4-20 x .50” 4. 710-3025 Hex Screw 5. 5 8 726-0205 Hose Clamp 6. 731-2113A Cup 16 7. 9 2 736-0119 Lock Washer 8. 736-0242 Beleville Washer 9. 736-0329 Lock Washer 10. 15 741-0475 Plastic Bushing 11. 17 751-0535 Fuel Line Hose 12. 751-0540A Fuel Tank: 2 Quart 13. 751-0800 Fuel Cap 14. 754-0101A V-
Summary of the content on the page No. 19
Model 421R 19
Summary of the content on the page No. 20
MANUFACTURER’S LIMITED WARRANTY FOR: TWO-YEAR RESIDENTIAL ONE-YEAR COMMERCIAL Proper maintenance of your Cub Cadet equipment is the owner’s responsibility. Follow the instructions in your operator’s manual for correct lubricants and maintenance schedule. Your Cub Cadet dealer carries a complete line of quality lubricants and filters for your equipment’s engine, transmission, chassis and attachments. Riding mowers, lawn tractors, garden tractors, Cub Cadet attachments and home maintenance produc
