924 Sno-Thro Service Manual Models 924108 - 924113, 924115, 924327 - 924330, 924500, 924501 00040700 02/00 Printed in USA
TABLE OF CONTENTS Section 1 - Introduction . . . . . . . . . . . . . . . . . 1.1 The Manual . . . . . . . . . . . . . . . . . . . . . . . 1.2 Service and Replacement Parts . . . . . . . 1.3 Product Registration . . . . . . . . . . . . . . . . 1.4 Unauthorized Replacement Parts . . . . . . 1.5 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . 1.6 Technical Service Communications . . . . . 1.3 1.3 1.3 1.3 1.3 1.3 1.3 Section 2 - Safety . . . . . . . . . . . . . . . . . . . . . . 2.1 Safety Alerts .
SECTION 1 - INTRODUCTION 1.1 THE MANUAL 1.3 PRODUCT REGISTRATION It is the purpose of this manual to provide complete instructions for service, maintenance, disassembly, repair, and installation of the mechanical components for the 924 Snow-Thro. A warranty registration card must be filled out, signed, and returned at the time of purchase. This card activates the warranty. Claims meeting requirements during limited warranty period will be honored.
SECTION 2 - SAFETY 2.1 SAFETY ALERTS 2.6 PREPARATION Look for these symbols to point out important safety precautions. They mean: Before starting any removal of parts, proper preparation is very important for efficient work. A clean work area at the start of each job will allow you to perform service repairs easily and quickly.
Hazardous Slopes 2.9 SAFETY RULES DO NOT operate on steep slopes. Avoid operating on slopes. When you must operate on a slope, travel up and down the slope. Never operate cross a slope. Never operate on a slope greater than 10 degrees. Walk Around Inspection Complete a walk around inspection of unit and work area to understand: • Work area. Child Safety • Your unit. NEVER allow children to operate or play on or near unit. Be alert and shut off unit if children enter area. • All safety decals.
Before maintenance, adjustments, or service (except where specifically recommended), shut off engine. Allow hot parts to cool. Keep unit free of dirt, stones, and other debris. Clean up oil or fuel spills. Storage DO NOT store unit inside a building with fuel in the fuel tank where any ignition sources are present. Allow unit to cool completely. ALWAYS clean unit before extended storage. See Engine Manual for proper storage. Battery Avoid Electric Shock. DO NOT reverse battery connections.
SECTION 3 - SPECIFICATIONS Model Number 924108 924109 924110 924111 924112 Model ST 824 SLE ST 1028 SLE ST 824 DLE SB 936 LE ST 928 LE Engine - manufacturer Tecumseh Tecumseh Tecumseh Tecumseh Tecumseh HMSK80 HMSK100 HMSK80 OHSK90 OHSK90 Fuel Unleaded Unleaded Unleaded Unleaded Unleaded Fuel Tank Capacity Governed RPM Crank Case Capacity Engine Oil 1 gallon 1 gallon 1 gallon 1 gallon 1 gallon 3600 ± 150 3600 ± 150 3600 ± 150 3600 ± 150 3600 ± 150 21 oz. 21 oz.
Model Number 924327 924328 924329 924330 924500 Model ST 1028 SLE ST 824 DLE ST 928 LE SB 1132 LE ST 1336 LE Tecumseh Tecumseh Tecumseh Tecumseh Tecumseh Engine - manufacturer Fuel Fuel Tank Capacity Idle RPM Governed RPM Crank Case Capacity HMSK100 HMSK80 OHSK90 OHSK110 OHSK130 Unleaded Unleaded Unleaded Unleaded Unleaded 1 gallon 1 gallon 1 gallon 1 gallon 1 gallon 1800 1800 1800 1800 1800 3600 ± 150 3600 ± 150 3600 ± 150 3600 ± 150 3600 ± 150 21 oz. 21 oz.
Model Number 924113 924115 924501 Model ST 1132 LE ST 1028 SLE ST 1336 LE Tecumseh Tecumseh Tecumseh OHSK110 HMSK100 OHSK130 Unleaded Unleaded Unleaded Engine - manufacturer Fuel Fuel Tank Capacity Governed RPM Crank Case Capacity Engine Oil Spark Plug Gap/Type Drive/Differential 1 gallon 1 gallon 1 gallon 3600 ± 150 3600 ± 150 3600 ± 150 21 oz. 21 oz. 21 oz. 40o 5W30 below 30W above 40o 40o 5W30 below 30W above 40o 5W30 below 40o 30W above 40o .030/Champion .030/Champion .
SECTION 4 - GENERAL MAINTENANCE & ADJUSTMENTS 4.1 CONTROLS AND FEATURES 4 9 14 5 1 7 10 21 6 11 13 15 2 3 16 22 12 8 19 18 17 Figure 1 1. Attachment Clutch Lever 2. Speed Selector 3. Chute Crank 4. Wheel Drive Clutch Lever 5. Primer Bulb 6. Throttle 7. Choke 8. Scraper Blade 9. Oil Fill and Dip Stick 10.Chute Deflector 11.Discharge Chute 12.Axle Lock Pin 13.Light 14.Fuel Tank and Cap 15.Fuel Shut-Off Valve 16.Belt Guard 17.Runner(s) 18.Auger 19.Impeller 20.Scraper Blade 21.
4.2 SERVICE POSITIONS Ariens Dealers will provide any service or adjustments which may be required to keep your unit operating at peak efficiency. Should engine service be required, contact an Ariens dealer or an authorized engine manufacturer’s service center. 3 WARNING: ACCIDENTAL ENGINE START UP can cause death or serious injury. ALWAYS stop engine, remove key, wait for moving parts to stop and remove wire from spark plug before adjusting or servicing.
To add fuel to the fuel tank: 1. Refuel the unit only in a well ventilated, open area. IMPORTANT: DO NOT allow grease or oil to get on friction wheel, drive disc or belts. Apply Sten Mix Hi-Temp Grease or equivalent to the lube fittings. Order P/N: 00036800 - three pack of 3 oz. cartridges or P/N 00036800 - ten pack of 14 oz. cartridges. 2. Stop the engine and allow to cool. 3. Clean the fuel cap and the area around the fuel cap to prevent dirt from entering the fuel tank.
4.6 AUGER GEARCASE Engine Oil Check IMPORTANT: Too much lubricant may cause excessive leakage. Too little lubricant will cause gear and/or bearing damage. Proper oil level must be maintained for operation. The engine crankcase oil should be checked daily or every 5 hours of operation. Oil level MUST be maintained in safe operating range on dipstick at all times or engine damage will result (See Engine Manual). Gear cases are filled to the correct level at the factory.
IMPORTANT: Use care when rotating the belt fingers to prevent deformation of parts. 4 NOTE: To gain clearance engage traction clutch and if necessary pull back attachment idler arm clevis pin. 6 3 3. Replace traction drive belt and belt fingers in reverse order making sure pulleys align. If alignment is necessary, loosen engine pulley set screws, reposition pulley and retighten set screws. Check alignment of attachment driven pulley and align if necessary. 2 1 7 4. Check and adjust clutch. 4.
(Figure 7). Allow 1/8" (3 mm) between scraper blade and hard smooth surface. Allow 1-1/4" (30 mm) minimum between scraper blade and uneven surface(s). 1 3. Retighten hardware. 3 NOTE: Keep housing level by adjusting runners equally. Uneven runners make unit difficult to steer and results in uneven clearing. 2 4 1. 2. 3. 4. Auger Roll Pin Shear Bolt(s) Nut(s) Figure 6 2 OS0401 1 For Replacement: 1. Slide auger outward against roll pin and align hole in shaft with hole in auger.
3 1 5 1 6 4 7 2 8 2 9 11 3 1. Drive Belt 2. Brake Shoe and Pad 3. 1/16" (1.6 mm) minimum 10 1. 2. 3. 4. 5. 6. Carriage Bolt Spring Pinion Bracket Pinion Chute Strap Flat Gear 7. Gear Strap 8. Mounting Nut 9. Chute Ring 10.Lower Ring 11.Retainer Clip Figure 8 Figure 9 OS0660 Traction Drive Clutch Adjust traction clutch to compensate for wear of friction wheel when slippage occurs. DS0112 To adjust traction clutch, place speed selector in First (1) Forward and tip unit forward onto housing.
Speed Selector Adjustment is required if you are unable to shift into all gears. 1. Put unit into Upright Service Position. 2. Disconnect the speed selector rod from the adjustment lever by removing hairpin (Figure 11). 3. Place the speed selector in the fast reverse speed position (Figure 11). 4. Thread the rod adjustment pin along the speed selector rod until it aligns with the mating hole on the speed selector lever. Insert the rod adjustment pin into hole. 5.
SECTION 5 - HANDLEBARS & CONTROLS 2 4 1 11 7 9 6 5 3 10 8 1. Chute Crank Handle 2. Speed Selector Lever 3. Set Screw 4. Chute Deflector Remote 5. Attachment Clutch Arm 6. Clutch Cable Spring 7. Clutch Cable 8. Traction Clutch Arm 9. Speed Selector Rod 10.Rod Adapter 11.Traction Clutch Cable Figure 12 5.1 LOWER HANDLEBAR Remove nut and washer attaching lower handlebar to each side of frame and remove lower handlebar. DS0161 5.
5.4 CLUTCH YOKE AND FORK Remove locknut and adapter spacer holding spring assembly in clutch yoke (Figure 13). Remove capscrew, nut, and rod adapter from yoke. Remove cotter pin from end of spring assembly in clutch fork. Remove spring assembly and extension spring. Punch out roll pins holding fork pivot rod in frame and remove rod and clutch fork. Check parts for wear or replacement. Assemble using reverse procedure. 1. 2. 3. 4. 5. 6. 7. 8.
SECTION 6 - ENGINE 6.1 ENGINE TROUBLESHOOTING The following troubleshooting chart is to be used to isolate engine problems and give possible causes and corrective action responses. TROUBLE The troubleshooting key is generic and can be used for several types of engines. Use only those possible causes and corrective actions that apply to the unit.
See your engine manual for information on the operation and maintenance of your engine. Follow those instructions for oil and filter changes. 6.2 REMOVING THE ENGINE 1. Drain gasoline. 2. Place unit in the Belt Service Position. 3. Remove both belts from the engine pulleys. Remove pulleys. 4. If the unit has a bracket at the top of the engine for chute/deflector controls, unbolt it. 5. On electric start units, disconnect the battery. Remove the starter. 6.
SECTION 7 - REDUCTION DRIVE The unit can be equipped with either of two drive axles. The first type is a differential axle (Figure 14). To lock into two wheel drive the left hand wheel has a lockout hub. The second type is a spur gear drive (Figure 15). To lock a wheel to the axle, a pin is inserted through the wheel hub and through the axle. 7.1 DIFFERENTIAL, LOCKOUT, AND AXLE Place unit in Upright Service Position. 1.
5 4 1 6 2 3 1. 2. 3. 4. Bearing Flange Ball Bearing Bearing Flange Axle Shaft 5. Spur Gear 6. Pin Lock Figure 15 PS0612 7.4 DRIVE CHAIN Place unit in Upright Service Position. To remove link from chain and chain from sprocket: On the continuous chain grind off end of rivet. When replacing chain, be sure retainer clip faces center of unit and is well seated in grooves of master link (P/N 00004100). 3 2 7.5 DRIVE CHAIN ADJUSTMENT 4 Place unit in Upright Service Position.
SECTION 8 - FRICTION WHEEL DRIVE 8.1 FRICTION WHEEL 8.3 DRIVE PLATE SPINDLE 1. To replace friction wheel, tip unit up into the upright service position. Place unit in the Belt Service Position. 2. Remove bottom cover by removing four cap screws. Remove lock nut from pulley end of spindle and pulley from spindle (Figure 18). To remove nut, engage friction wheel drive to keep spindle from turning. 3.
4 2 3 5 6 12 1 11 13 7 8 9 10 1. 2. 3. 4. 5. Spindle Hub Friction Disk Disc Hub Flange Bushing Sleeve Bushing 6. Ball Bearing 7. Drive Plate 8. Spindle 9. Housing Mount 10.Bearing Figure 18 8 - 25 11.Bearing Spacer 12.Spindle Housing 13.
SECTION 9 - AUGER/IMPELLER 9.1 AUGER/IMPELLER REMOVAL 2. Loosen retaining blade nuts (Figure 19). Place unit in the Belt Service Position. 1. Remove three nuts holding pulley to hub and remove pulley and key. 3. With runners adjusted to their full up position, reposition scraper blade down, flush with runners. 4. Tighten lock nuts. 2. Loosen set screw in hub and remove hub. 9.3 SHEAR BOLTS 3. Remove three nuts holding bearing flange to housing and remove bearing flange (Figure 19).
9.4 DISCHARGE CHUTE NOTE: Chute must rotate freely. To adjust the gears tighten or loosen the lower nut (Figure 20). This will adjust the spring tension on the gears. WARNING: DO NOT put hands or feet near or under rotating parts. Keep clear of discharge opening at all times. WARNING: NEVER direct discharge of material toward bystanders nor allow anyone in front of equipment while unit is in operation. Be familiar with area of operation.
9.5 DEFLECTOR 9.6 RUNNERS To install a new deflector cable: Remove one jam nut from deflector cable (Figure 21). Route cable through retainer mounted on engine and chute bracket. Replace jam nut and secure cable threaded connector (from left side) to deflector bracket with cotter pin. Position deflector in its lowest position with cable control pushed full in and tighten jam nuts on chute bracket. NOTE: Check deflector movement to highest position.
SECTION 10 - GEAR CASE 10.1 CAST IRON GEAR CASE (WORM GEAR) the flat on bronze gear face will fill the hole in the side of the gearcase. Remove auger/impeller and gear case from housing referring to Auger/Impeller Section. Remove bronze bushing from front of worm shaft by sliding it off. Replace if necessary. Notice that a flat on the bushing flange positions the bearing inside the gearcase. Remove four bolts from bearing flange (Figure 22). Remove flange and gasket.
Cast Iron Gear Case 1 2 3 7 4 6 5 1. 2. 3. 4. Impeller Worm Shaft Adjustment Plug Worm and Gear Service Assembly 5. Rake Shaft 6. Gear Case Shaft 7.
Aluminum Gear Case 1 3 4 2 5 6 1. 2. 3. 4. 5. 6.
SECTION 11 - ELECTRICAL 11.1 CONTINUITY DIAGRAM The diagrams below show the various states of connection for electrical components. The solid lines on switches show continuity. NOTE: All switches are viewed from the rear.
11.2 WIRING DIAGRAM HEAD LIGHT KIT (OPTIONAL) 1 2 A.C. LIGHTING YELLOW YELLOW ENGINE D.C.
Ariens Company 655 West Ryan Street P.O. Box 157 Brillion, WI 54110-0157 920-756-2141 Fax 920-756-2407 www.ariens.
