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Sno-Thro®
Owner/Operator Manual
Models
939001 – ST520E
939002 – ST520
ENGLISH
FRANÇAIS
00582600A 6/06
Printed in USA
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TABLE OF CONTENTS SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SERVICE PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . 20 CONTROLS AND FEATURES . . . . . . . . . . . . . . . . 9 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1. Read and understand all assembly instructions in 3. Review control functions and operation of the this manual. If you do not understand or have unit. Do not operate the Sno-Thro unless all difficulty following the instructions, contact your controls function as described in this manual. nearest Ariens Dealer for assistance. Make sure 4. Review recommended lubrication, maintenance all assembly has been properly completed. and adjustments. NOTE: To locate your nearest Ariens Dealer, go to
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1. WARNING! 3. DANGER! Read Owner/Operator Manual. ROTATING PARTS. Keep clear of auger while engine is running. OL1801 � Read Operator’s Manual. OS2080 � Allow operation only by properly Keep people away from unit while trained adult, never children. operating. Keep children out of work � Stop engine and remove ignition area and under watchful care of a OL4370 key prior to leaving the operator’s responsible adult. position for any reason. � Keep all controls, guards and Never direct dis
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NEVER operate unit after or during the use of Use only approved extension cords and receptacles medication, drugs or alcohol. Safe operation requires when starting units equipped with electric starter. DO your complete and unimpaired attention at all times. NOT connect electric starter cord to any wiring system that is not a three-wire grounded system. NEVER allow anyone to operate this unit when their alertness or coordination is impaired. ALWAYS allow unit and engine to adjust to outdoor
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Keep unit free of ice or other debris. Clean up oil or fuel Before tipping unit up onto housing, remove fuel so no spills. spills will occur. Ensure unit is secure and will not tip over during maintenance. This product is equipped with an internal combustion type engine. DO NOT use unit on or near any ALWAYS keep protective structures, guards, and unimproved, forest-covered or brush covered land panels in good repair, in place and securely fastened. unless exhaust system is equipped with a
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ASSEMBLY 1 WARNING: AVOID INJURY. Read and 1 understand the entire Safety section before proceeding. WARNING: Dropping or tipping over boxed unit could result in personal injury or damage to unit. PACKAGE CONTENTS 2 2 1 3 3 1. Lower 3.Upper Handlebar Handlebar 2. Hardware OS7035 Figure 4 Install Discharge Chute (Figure 5) 1. Grease underside of discharge chute ring (if not already greased). 2. Remove mounting hardware from the bottom of the chute pedestal. 4 3. Install discharge chute o
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Check Tire Pressure Check Function of all Controls Check tire pressure and adjust to the pressure listed on Ensure unit runs and performs properly. Refer to tire sidewall. Operation. Check Auger Gearcase Oil Run-in Attachment Belt Check oil level in auger gearcase (see Check Auger 1. Start unit in a well-ventilated area according to Gearcase on page 14). Starting and Shut Off on page 12. 2. Engage attachment clutch lever and run Check Engine Crankcase Oil attachment for about 15 minutes. IMPO
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CONTROLS AND FEATURES 1. Attachment Clutch Lever 1 2 2. Traction Drive Clutch Lever 3. Chute Handle (939001, 002) 4. Discharge Chute Deflector 3 5. Discharge Chute 6. Impeller 4 7. Auger 5 8. Scraper Blade 23 6 9. Auger Gearcase 10. Clean-out Tool 7 13 11. Oil Fill and Dipstick 12. Gas Tank and Cap 11 13. Electric Starter (939001) 14. Recoil Starter Handle 15. Primer Bulb 8 16. Oil Drain Plug 22 9 17. Throttle (Engine Stop) 10 21 18. Ignition Switch (push-pull) 19. Choke 20. Spark Plug and Wire
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OPERATION Primer Bulb WARNING: AVOID INJURY. Read and Pushing the primer bulb in adds fuel for understand the entire Safety section before easier engine start. Refer to Starting and proceeding. Shut Off on page 12. OS1321 WARNING: To avoid injury to hands and feet, Choke Control Knob always disengage clutches, shut off engine, and wait for all movement to stop before 1. Choke Closed position: chokes off unclogging or working on snow thrower. air to engine for easier start. Keep hands and
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To clear the discharge chute: FILLING FUEL TANK 1. Shut off the engine. WARNING: AVOID INJURY. Read and 2. Wait 10 seconds and make sure impeller blades understand the entire Safety section before have stopped rotating. proceeding. 3. Remove the snow clean-out tool (1) from the To add fuel to fuel tank: auger housing and use it to remove the clog from 1. ALWAYS place unit in open or well-ventilated the discharge chute. area. 4. Replace the snow clean-out tool on the auger 2. Stop engine
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4. Make sure that the traction clutch and attachment TO STOP IN AN EMERGENCY drive clutch levers are fully disengaged. Immediately release both control levers to stop unit in an emergency. Stop engine, remove key and wait for 5. Push Primer Bulb 2 or 3 times for cold engine. all rotating parts to stop before leaving operator’s NOTE: When temperature is below -15° F (-26° C) position. additional priming may be needed. 6. Insert key into ignition switch on engine and push STARTING AND SHUT OF
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Tips for Operation TRAVELING Snow is best removed as soon as possible after snow To travel from one work area to another: fall. 1. Set Throttle to Slow or Part-Throttle position. To clear an area, run unit in an overlapping series of 2. Press down on handlebars enough to raise front paths. For large areas, start in the middle and throw of unit slightly off surface. snow to each side, so snow is not cleared more than 3. Disengage traction drive clutch and push unit to once. new work area. AL
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MAINTENANCE SCHEDULE CHECK ENGINE OIL The chart below shows the recommended The engine crankcase oil should be checked every 5 maintenance schedule that should be performed on a hours of operation. Oil level MUST be maintained in regular basis. More frequent service may be required. safe operating range on dipstick at all times or engine damage will result (See Engine Manual). Park unit on a level surface. Refer to Engine Manual for MAINTENANCE SCHEDULE detailed instructions. Service Each
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IMPORTANT: DO NOT allow grease or oil to get on the belts. NOTE: Apply Ariens Hi-Temp Grease or equivalent to Grease Oil the lubrication fittings. See SERVICE PARTS on page 20. Sno-Thro should be lubricated (Figure 10) at beginning of season or every 25 operating hours. Auger Shaft NOTE: To grease auger shaft, remove shear bolt nuts, and shear bolts. Apply grease at the grease zerks and then turn the auger shaft. Replace shear bolts per instructions in Shear Bolts on page 15. Figure 10 OS
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For Replacement: ATTACHMENT CLUTCH/BRAKE 1. Align shear bolt holes in auger with shear bolt ADJUSTMENT holes in the shaft. WARNING: IMPROPER ADJUSTMENT 2. Drive shear bolt through hole (if shear bolt was could result in unexpected movement of broken this will drive remaining part from shaft). auger and impeller causing death or serious injury. AUGER / IMPELLER MUST STOP 3. Secure shear bolt with nut. within 3 seconds when Attachment NOTE: DO NOT overtighten the shear bolt. Tighten Clutch
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1 3 2 2 1 1/16 in. (1.6 mm) 1.Drive Brake 2.Brake Shoe and Pad Figure 17 7. Repeat steps 5 – 6 until attachment clutch lever distance and brake contact are correct. IMPORTANT: If attachment clutch/brake cannot be 1.Attachment Clutch Cable adjusted within tolerances, see your Dealer for repairs. 2.Jam Nut 3. Adjustment Barrel 8. Check belt finger clearance. With clutch lever engaged, belt fingers should be Figure 16 positioned as shown in Figure 22. Adjust belt 3. Check attachment clutch leve
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To adjust traction clutch (Figure 19): 5. Remove top two cap screws and loosen lower two cap screws holding blower housing to frame 1. Loosen jam nut on traction clutch cable (one on each side). adjustment barrel. 6. Remove attachment drive belt from engine Turn adjustment barrel up the cable to decrease sheave (it may be necessary to turn engine the distance between clutch lever and handlebar. sheave using recoil starter handle). Turn the adjustment barrel down the cable to 7. Separate h
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TRACTION DRIVE BELT REPLACEMENT 2 3 NOTE: Housing and frame must be tipped apart and 1 attachment drive belt removed from engine sheave in order to change traction drive belt (Figures 20 and 21). CAUTION: Always support Sno-Thro frame 6 and blower housing when loosening the cap screws holding them together. Never loosen cap screws while unit is in service position. 6 1. Shut off engine, remove key, disconnect spark plug wire and allow unit to cool completely. 2. Remove attachment drive bel
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8. Replace attachment drive belt (See Replace SERVICE PARTS Attachment Drive Belt on page 18). Order the following parts through your Dealer: 9. Check traction drive clutch adjustment. See Traction Drive Clutch Adjustment on page 17. Part No. Description 00036800 Ariens Hi-Temp Grease (3, 3 oz. STORAGE cartridges) 21533400 Spark Plug (939001, 002) WARNING: AVOID INJURY. Read and 07200108 Impeller Belt understand the entire Safety section before proceeding. 07200109 Stretch Fit Traction Be
