Obriens Series Sno-Thro® ▲ SAFETY MESSAGE A The product for which you have requested information or repiacement parts is not a current product. The repiacement models incorporate product designs, safety features, safety instructions or warnings which repre sent the latest “State Of The Art” develop ments. For your safety and those around you please contact your nearest Ariens/Gravely Dealer for a demonstration of the current product safety provisions and features.
A Message To Ariens Repair Manuai User Your Ariens Dealer will be happy to supply any service or advice which may be required to keep your Ariens equipment operating at peak efficiency. He stocks genuine Ariens parts and lubricants; manufactured with the same precision and skill as the original equipment. His factory trained staff is kept well informed on the best methods of servicing Ariens equipment and is ready and able to serve you.
Safety Alert Symbol And Notations The following safety notations are used throughout this manual to call attention to special information or operating procedures. Understand the message in each notation and be alert to unsafe conditions and the possibility of personal injury. NOTE: A NOTE points out general reference infor mation regarding proper operation and maintenance practices.
Special Tools 000078 - Bearing Driver for SnoThro axle shaft and Sno-Thro gear case. Roll Pin Driver for installation of roll pins on all Ariens equipment. 000096 - 1/8 000162-3/16 000099-5/16 000098 - 1-1/4 000097 - Bearing Driver for SnoThro gear case flange and blower bearing supports. 000131 - Bearing Cup Driver for Sno-Thro gear case. Slide Driver. (£ 5) 000200 - Tire Removal and Re placement Tool for small pneuma tic tires. 000246 - Spring Tool. For most Ariens Springs.
Index Section Specifications. Handlebars and Controls. Speed Selector and Wheels Belt Drive Reduction Drive Friction Wheel Drive. Auger/Impeller. Gear Case. Engine and Headlight Attachments.............. © Ariens 1987 RM-924 Part No. 000123A Printed in U.S.A.
Notes
Specifications Length.................................................................... 60-63 inches Height.................................................................... 40" Cleaning Width..................................................... 24"-36" Shipping Weight................................................... 245 lbs to 345 lbs. Wheel Size.............................................................(4.80/4.00 x 8) (16/6.50 x 8) (4.10/3.50 x 6) Engine, Horsepower...............................
Handlebars and Controls Table of Contents Page 2.1 Upper Handlebar Panel and Key Switch...............................................................................................2-4 2.2 Lower Handlebar....................................................................................................................................... 2-4 2.3 Clutch Handle.............................................................................................................................................
Handlebars and Controls 1. 2. 3. 4. 5. 6. 7.
Handlebars And Controls MECHANICAL INTERLOCK Figure 2-2: Handlebars and Controls 2-2
Handlebars And Controls ITEM NO. ITEM NO. DESCRIPTION DESCRIPTION 1 Wheel Drive Clutch Lever 37 Cotter Pin 3/32 X 3/4 2 Upper Handle Bar 38 Clutch Fork 3 Lock Nut 1/4-20 39 Fork Pivot Rod Washer 1/4 40 Cotter Pin 3/32 X 1" 5 Cap Screw 1/4-20 x 1-1/2 41 Spring Assembly 6 Key Switch Nut 5/8-32 42 Clutch Engagement Yoke Key Switch Assembly 43 Lock Washer Int.
Handlebars and Controls 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Key Stiffener Wire Nut Washer Lower Handlebar Carriage Bolt 5/16-18 x 1-1/2 Key Switch Key Switch Nut Cap Screw Carriage Bolt 1/4-20 x 1-1/2 Lock Nut Figure 2-3: Handlebar Assembly 2.1 Upper Handlebar Panel and Key Switch 2.2 Lower Handlebar Remove nut and washer attaching lower handlebar to each side of frame and remove lower handlebar. Disconnect wires to key switch.
Handlebars and Controls 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Push Nut Pin Attachment Clutch Rod Setscrew Clevis Cotter Pin Chain Spring Rod Adapter Traction Clutch Rod Setscrew Clevis Push Nut Pin Figure 2-4: Attachment Clutch and Traction Rod 2.3 2.5 Clutch Handle Remove (2) push nuts, pin and (2) screws holding pivot and Wheel Drive Clutch Lever to upper handle bar and remove pivot and Wheel Drive Clutch Lever.
Handelbars and Controls 2.7 Traction Drive Clutch Adjustment 2.6 Clutch Yoke and Fork Remove locknut and adapter spacer holding spring assembly in clutch yoke. Remove capscrew, nut and rod adapter from yoke. Remove cotter pin from end of spring assembly in clutch fork and remove spring assembly and extension spring. 1. 2. 3. 4. 5. 6. 7. 8. Traction Clutch Rod Spacer Setscrew Rod Adapter Extension Spring Cotter Pin Fork Pivot Rod Cotter Pin 9. Clutch Fork 10. Spring Assembly 11. Nut 12. Clutch Yoke 13.
Handelbars and Controls Check interlock by pressing down on clutch levers (engaging both clutches). Remove hand from attachment clutch lever, attachment clutch should remain engaged until traction clutch lever is re leased then both clutches must disengage. 2.8 Mechanical Interlock Adjustment A WARNING: With improper usage of unit, failure of interlock if unnoticed, could result in severe personal injury. 2.9 Bellcrank and Slider Remove nut and washer holding bellcrank to upper handlebar panel.
Handelbars and Controls 2.10 Chute Crank On ST 1136 to prevent discharge chute from rotat ing by itself when unit is being operated, tighten jam nuts on end of crank rod to put increased tension on worm gear. Smooth and easy rotation of properly lubricated chute with crank (without binding) is obtained by adjusting clearance between worm and discharge chute gear teeth.
Handlebars and Controls ELECTRICAL INTERLOCK WHITE TO ENGINE ■ MAGNETO 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
Handlebars and Controls Check switch bracket alignment with switch and align if necessary. 2.11 Electrical Interlock Adjustment Engine runs with interlock and/or traction clutch engaged. Engine must stop if both are disengaged with attachment clutch engaged. To adjust length of rod, remove cotter pin from upper interlock rod at handle, loosen lock nut and turn rod to lengthen or shorten. Shorten interlock rod if engine will not run with interlock, attachment clutch and/or traction clutch engaged.
Notes
Speed Selector and Wheels Table of Contents Page 3.1 Speed Selector........................................................................................................................................... 3-4 3.2 Speed Selector Adjustment..................................................................................................................... 3-4 3.3 Shift Arm Lever and Links....................................................................................................................
Speed Selector and Wheels f— j—If—\J— i V—a__rt__a--' 1. 2. 3. 4. 5. 6. 7. 8.
Speed Selector And Wheels ©- 3-2
Speed Selector And Wheels IT E M IT E M NO. D E S C R IP T IO N 1 Snap Ring Ext.
Speed Selector and Wheels 3.1 Speed Selector Remove cotter pin in upper rod and disconnect rod from pivot. Remove cotter in lower rod and disconnect from shift arm lever. Remove upper cap screw and nut in pivot and remove shift rod and knob. Remove lower cap screw and nut in pivot and remove pivot from upper handle bar panel. Check parts for wear or replacement. Assemble, using reverse procedure. 3.2 Speed Selector Adjustment Place Speed Selector in Reverse (R) position.
Notes
Belt Drive Table of Contents Page 4.1 Introduction.............................................................................................................................................. 4-4 4.2 Attachment Drive Belt...............................................................................................................................4-4 4.3 Traction Drive Belt...................................................................................................................................
Belt Drive 1. 2. 3. 4. 5. 6.
Belt Drive 4-2
Belt Drive IT E M NO. IT E M D E S C R IP T IO N NO. D E S C R IP T IO N Washer 5/16 Taptite 1/4-20 x 1/2 31 10 Washer 17/64 32 Idler 11 Belt Cover 33 Bearing Spacer 12 Belt Finger 34 Cap Screw 5/16-18 x 1-1/4 13 Washer 3/8 35 Idler Arm 14 Lock Washer Ext.
Belt Drive 4.1 Remove attachment drive belt from pulley (hold brake away from belt). Introduction A WARNING: Remove wire from spark plug before attempting any repair or adjustment procedures. Replace attachment drive belt in reverse order making sure pulleys align. If alignment is necessary, loosen attachment pulley set screws, reposition pulley and retighten set screws.
Notes
Reduction Drive Table of Contents Page 5.1 Introduction................................................................................................................................................ 5-4 5.2 Differential, Lockout and Axle................................................................................................................ 5-4 5.3 Axle Bearings........................................................................................................................................
Reduction Drive Figure 5-1: Reduction Drive Assembly 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
Reduction Drive Figure 5-2: Reduction Drive 5-2
Reduction Drive IT E M IT E M D E S C R IP T IO N NO. D E S C R IP T IO N 1 Taptite 1/4-20 x 3/8 2 Shaft Support 31 32 Pinion and Sprocket Bushing 3 4 Bearing Retainer 33 Zerk Fitting Ball Bearing 1-1/8 I.D. 34 Differential or Spur Gear Washer 7/8 35 L.H. Axle 6 Rib Neck Bolt 1/4-20 x 1/2 36 Bushing 7 Lock Nut 1/4-20 37 38 Lock Washer Ext. 1/4 Zerk Fitting NO.
Reduction Drive 5.1 Remove cap screws and lock nuts that retain bearing retainer and bearing on frame. Introduction A WARNING: Gasoline is highly flammable and its vapors are explosive. Handle with care. Assemble in reverse order. 5.4 When unit is tipped to preform the service proce dures in this section, remove enough fuel so that no spillage will occur, block securely and remove bottom cover. A WARNING: Remove wire from before attempting any repair ment procedures.
Reduction Drive 5.7 Drive Chains 5.8 Drive Chain Adjustment Remove link from chain and chain from sprocket. If Sno-Thro is difficult to push because of tight or interfering drive chains, proceed as follows: On 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, No. 000041. Stand unit up on auger/impeller housing and re move bottom cover.
Friction Wheel Drive Table of Contents Page 6.1 Introduction........................................................................................................................ 6-3 6.2 Friction Wheel.................................................................................................................... 6-3 6.3 Friction Wheel Carrier....................................................................................................... 6-3 6.4 Drive Plate Spindle...............................
Friction Wheei Drive 1. 2. 3. 4.
Friction Wheel Drive iTEM NO. ITEM NO. DESCRIPTION DESCRIPTION 1 Drive Plate 2 Drive Disc Spacer 3 Spindle 4 Woodruff Key 1/8 x 1/2 x 13/64 5 Drive Spindle Housing 20 Carrier 6 Bearing 5/8 I.D. 21 Radial Bearing 7/8 7 Bearing Spacer 22 Washer 7/8 8 Bearing Housing 23 Snap Ring Int.
Friction Wheel Drive 6.3 Friction Wheel Carrier 6.1 Introduction A WARNING: Remove wire from spark plug before attempting any repair or adjustment procedures. When unit is tipped to preform the service proce dures in this section, remove enough fuel so that no spillage will occur, block securely and remove bottom cover. A Remove roll pins from carrier shaft and pull shaft out of frame far enough to free carrier. Hold hex shaft on sprocket end with a wrench and remove lock nut at outside of frame.
Auger/Impeller Table of Contents Page 7.1 Introduction....................................................................................................................... 7-4 7.2 Auger/Impeller Housing.................................................................................................... 7-4 7.3 Auger/Impeller Removal................................................................................................... 7-4 7.4 Attachment Clutch/Impeller Brake....................................
Auger/Impeller 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Auger/Impeller ¿^>,3 Figure 7-2: Auger/Impeller 7-2
Auger/Impeller ITEM NO. 1 ITEM NO. DESCRIPTION Deflector DESCRIPTION 36 Lock Nut 1/4-20 2 Cap 37 Bushing 3 Knob 38 Washer 1/2 4 Chute Control Crank 39 Lock Washer 1/2 5 Hair Pin or Cotter Pin 40 Cap Screw 1/2-13 x 1" Extension Spring 6 Universal Joint 41 7 Roll Pin 1/8 X 3/4 42 Lock Nut 1/4-20 8 Rod 43 Arm Extension 9 Chute Crank Bracket 44 Arm w/Lining 10 Worm Shaft 45 Clevis Pin 11 Wave Washer 46 Cotter Pin 1/16 X 3/4 12 L.H.
Auger/Impeller Grasp auger assembly and pull gear case and auger/ impeller assembly free of housing. 7.1 Introduction A WARNING: Remove wire from spark plug before attempting any repair or adjustment procedures. Drive roll pin out of shaft ends, remove shear bolts and remove auger from shaft. Check all parts for wear or replacement. When unit is tipped to preform the service proce dures in this section, remove enough fuel so that no spillage will occur, block securely and remove bot tom cover.
Auger/Impeller If impeller brake shoe is not 1/16 to 1/8 inch from belt, disengage clutch, loosen attachment idler nut, reposition idler to compensate for belt length, tighten nut and adjust attachment clutch per in structions below. 7.6 On ST 1136 remove one jam nut from deflector cable, 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.
Gear Case Table of Contents Page 8.1 Introduction.........................................................................................................................8-6 8.2 Cast Iron Gear Case (Worm Gear).................................................................................... 8-6 8.3 Aluminum Gear Case (Worm Gear).................................................................................. 8-6 8.4 Cast Iron Gear Case (Helicon Gear).......................................................
Gear Case 1. Cast Iron Gear Case (Worm) 2. Cast Iron Gear Case (Helicon) 3.
Gear Case Cast Iron
Gear Case Cast Iron ITEM NO. 1 ITEM NO. DESCRIPTION Roll Pin 5/16 18 X 1-3/4 DESCRIPTION Dust Cap 2 Fan 19 3 Woodruff Key 3/16x7/8x3/8 20 4 Worm Shaft 21 Bushing 5 Straight Key 3/16 x 1" x 3/16 22 Washer 1-5/8 6 Adjusting Plug 23 Woodruff Key 1/4 7 Seal 24 Gear Case Shaft 8 Bearing Cup 1-25/32 O.D. 25 Gasket 9 Bearing Cone 3/4 I.D. 26 Gear Case Cover Bearing Spacer 27 Lock Washer Int. 1/4 11 Worm & Gear 28 Cap Screw 1/4-20 x 3/4 12 Snap Ring Int.
Gear Case Aluminum ITEM NO. 1 ITEM NO. DESCRIPTION Roll Pin 1/4 X 1-3/4 15 DESCRIPTION Bushing Bushing 2 Impeller 16 3 0-Ring 17 Washer 1" 4 Bushing 18 Groove Pin 5/16 x 1-7/16 19 Gasket 20 R.H. Gear Case Half 5 Thrust Collar 6 Groove Pin 3/16 7 Woodruff Key 3/16 x 7/8 x 3/8 21 Lock Nut 1/4-20 8 Worm Gear & Shaft 22 Taptite 3/8-16 x 1/2 X 1-1/4 L.H. Gear Case Half 23 Rake Shaft 10 Carriage Bolt 1/4-20 x 1-1/4 24 Gear Case Assembly 11 Seal Requires 2 oz.
Gear Case Cast Iron Figure 8-4: Cast Iron Gear Case (Helicon Gear) 19 ITEM NO. 'I ITEM NO.
Gear Case 8.1 Using adjustment wrench, tighten down on adjust ment plug until input shaft is snug. Introduction A WARNING: Remove wire from spark plug before attempting any repair or adjustment procedures. Replace side cover using a sealant on threads of two bottom bolts. Fill gear case with L-2 oil until level reaches bottom of threads in filler hole.
Gear Case Inspect worm for burrs or black coloration. If either show up, replace shaft. Unscrew adjustment plug. (Use No. 90 Bearing Adjustment Wrench.) To assemble make sure you replace the case gasket and make sure flats on bushings are in their proper place. Insert punch through the oil filler hole and drive pinion shaft assembly out of gearcase. Remove bearing cup and snap ring from inner por tion of gearcase only if necessary. This case requires No. 70 Liquid Grease and should be half full.
Engine and Headlight Table of Contents Page 9.1 Engine Oil........................................................................................................................... 9-2 9.2 Engine Cooling.................................................................................................................. 9-2 9.3 Engine Oil Recommendations..........................................................................................9-2 9.4 Headlight....................................................
Engine and Headlight 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
Engine and Headlight crankcase with new oil of proper grade (per engine manufacturer's instructions). Recheck oil level with dipstick. Ariens Dealers will provide any service which may be required to keep your Sno-Thro operating at peak efficiency. Should engine service be required, it can be obtained from an Ariens dealer or an authorized engine manufacturer's service center. A A 9.1 9.2 Engine Cooling The engine is air cooled.
Engine and Headlight d.6 Headlight Install headlight bracket (level with floor) handlebar with hardware provided (Figure 10-1). NOTE; Two washers handlebar at top hole. go between on right bracket and Assemble hardware bracket. headlight, provided bracket and and install U-bracket with onto headlight Position headlight wire harness behind name plate along handlebar and plug into alternator connector. Secure harness to handlebar with clips.
Engine and Headlight For Use On Sno-Thro Models 9.7 Add-On Alternator Remove rewind starter keps nuts and starter from engine. (Note location of rewind starter handle). Remove pushout plug from top center of rewind starter. On die cast recoils, remove center hole cast material with 1/4 inch drill. Rotate pulley to expose 3 punch-outs (Figure 1), place starter on back-up surface and remove punchouts with 1/8" punch. Model Serial No.
Notes
Attachments Table of Contents Page 10.1 Caster Wheels..................... 10-3 10.2 Rotary Mower Lubrication. 10-7 List of Illustrations Page 10-1: Rotary Brush ..................................................................................................................10-2 10-2: Rotary Mower Drive....................................................................................................... 10-4 10-3: Rotary Mower Pan........................................................................
Notes 10-1
Attachments 81 1 0 /V\ J 0p% 82^m 1 Figure 10-1: Rotary Brush 10-2 s'a
Attachments ITEM ITEM N0. DESCRIPTION N0.
Attachments
Attachments ITEM N0. DESCRIPTION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 43 44 Cotter Pin 1/8 X 1" Lockwasher 3/8-.145 x .115 Ball Bearing Woodruff Key No. 9 Nut 3/8-16 Hex Full Plated Bushing Washer 1/4 Wrought Plated Lockwasher 5/16-.130 x .097 Cap Screw 5/16-18 x 3/4 H.H. Link Rod Lockwasher 3/4-.234 x .
Attachments Figure 10-3: Rotary Mower Pan
Attachments ITEM N0. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 10.2 DESCRIPTION ITEM N0. DESCRIPTION Cotter Pin 1/8 X 1" Shoulder Bolt Yoke Link Rod Yoke Lift Lever Lockwasher 3/8 Screw Pin Snap Ring Snap Ring Ball Bearing Roll Pin 1/8x1" Woodruff Key No.
Ask your dealer for information about these other fine Ariens products; Obriens Ariens Company 655 W.
