Sno-Thro® Owner/Operator Manual Models 921001 – ST824E 921002 – ST1027LE 921003 – ST1130DLE 921004 – ST924DLE ENGLISH FRANÇAIS 00660400A 10/07 Printed in USA
TABLE OF CONTENTS SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . 4 STORAGE . . . . . . . . . . . . . . . . . . . . . . 35 ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . 8 SERVICE PARTS . . . . . . . . . . . . . . . . . 35 CONTROLS and FEATURES. . . . . . . . 13 ACCESSORIES . . . . . . . . . . . . . . . . . . 35 OPERATION . . . . . . . . . . . . . . . . . . . . . 15 TROUBLESHOOTING . . . . . . . . . . . . . 36 MAINTENANCE . . . . . . . . . . . . . . . . . . 21 SPECIFICATIONS . . . .
Disclaimer Ariens reserves the right to discontinue, make changes to, and add improvements upon its products at any time without public notice or obligation. The descriptions and specifications contained in this manual were in effect at printing. Equipment described within this manual may be optional. Some illustrations may not be applicable to your unit. Delivery Customer Note: If you have purchased this product without complete assembly and instruction by your retailer, it is your responsibility to: 1.
SAFETY Practices and Laws WARNING: To avoid injury to hands and feet, always disengage clutches, shut off engine, and wait for all movement to stop before unclogging or working on snow thrower. Hand contact with the rotating impeller is the most common cause of injury associated with snow throwers. Never use your hand to clean out the discharge chute. Keep hands and feet away from auger and impeller. Practice usual and customary safe working precautions, for the benefit of yourself and others.
ONLY use clean-out tool to clear blockages. NEVER use your hands. 921001 1 2. DANGER! 2 3 OS6610 OS7017 ROTATING PARTS! ONLY use clean-out tool to clear blockages. NEVER use your hands. High speed impeller rotates below discharge opening. Wait for all moving parts to stop before removing clogs or servicing. Figure 3 3. DANGER! 1. WARNING! Read Owner/Operator Manual. OS2080 OL1801 OL4370 Keep people away from unit while operating.
Keep children and people away. Keep children out of work area and under watchful care of a responsible adult. NEVER allow children to operate or play on or near unit. Be alert and shut off unit if children enter area. DO NOT allow adults to operate unit without proper training. Only trained adults may operate unit. Training includes actual operation. Keep area of operation clear of all toys, pets, and debris. Thrown objects can cause injury. Check for weak spots on docks, ramps or floors.
Before cleaning, removing clogs or making any inspections, repairs, etc.: disengage clutch(es), stop unit and engine, remove key, allow moving parts to stop. Allow hot parts to cool. Run unit a few minutes after clearing snow to prevent freeze-up of attachment. Disengage attachment when not in use. Disengage all clutches before starting engine. Adjust runners to clear gravel or crushed rock surfaces safely. Never leave a running unit unattended. ALWAYS shut off engine before leaving unit.
ASSEMBLY 921001 WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. 3 WARNING: Dropping or tipping over boxed unit could result in personal injury or damage to unit. 2 1 Package Contents 921002, 003, 004 4 3 2 OS7021 1. Sno-Thro Unit 2. Discharge Chute 3. Chute Rod 1 4 4. Literature Pack with Extra Shear Bolts Figure 5 Assembly OS7019 1. Sno-Thro Unit 2. Discharge Chute 3. Chute Rod Tools Required: • Pliers • Open-End Wrenches: 3/8, 7/16, 1/2, 9/16 in.
Install Discharge Chute and Discharge Chute Crank (921002, 003, 004) . 921001 (Figure 8) 1. Grease underside of discharge chute ring (if not already greased). 2. Remove mounting hardware from auger housing. 3. Install discharge chute over opening in the auger housing. Finger tighten the mounting hardware removed in step 2. NOTE: Leave discharge chute pedestal loose to help install the chute rod and connect it to the control assembly. 4 3 2 1 1 OS7032 1. Handlebar 2. Wing Knobs and Bolts 3.
NOTE: Do not remove the pin installed on the chute rod. NOTE: To ensure the discharge chute follows its full range of travel, make sure the control lever is pushed all the way to the left before installing and pinning the chute rod. 7. Align the holes on the end of the chute rod with the mark on the gear assembly and slide the end without a pin through the gear assembly, through the hook on the chute lock cable and into the hex hole in the control assembly.
Install Discharge Chute and Discharge Chute Crank (921001) 1. Route deflector remote cable along the left side of the chute pedestal. 2. Insert the barrel on the cable end into the bracket on left side of chute deflector (Figure 13). 3. Hold seal out of the way while routing the cable through the bracket on the left side of the discharge chute, and then push the cable fitting into the bracket. (Figure 12) 1. Grease underside of discharge chute ring (if not already greased). 2.
Check Tire Pressure Check Auger Gearcase Oil Check tire pressure and adjust to the pressure listed on tire sidewall. Check oil level in auger gearcase (see Check Auger Gearcase on page 22). CAUTION: Avoid injury! Explosive separation of tire and rim parts is possible when they are serviced incorrectly: • Do not attempt to mount a tire without the proper equipment and experience to perform the job. • Do not inflate the tires above the recommended pressure. • Do not weld or heat a wheel and tire assembly.
CONTROLS and FEATURES 921001 3 2 1 4 6 7 25 9 5 8 23 22 10 11 12 21 16 18 20 14 13 24 15 1. Attachment Clutch Lever 2. Speed Selector 3. Traction Drive Clutch Lever 4. Chute Control 5. Oil Fill/Dipstick 6. Discharge Chute Deflector 7. Discharge Chute 8. Impeller 9. Clean-Out Tool 10. Auger 11. Scraper Blade 12. Auger Gearcase 13. Recoil Starter Handle 14. Electric Starter 15. Wing Knobs 16. Ignition Key, Push-Pull 17. Oil Drain Plug 18. Throttle (Engine Stop) 19. Choke Control Knob 20.
921002, 003, 004 4 18 3 5 2 1 17 7 29 8 28 10 9 6 26 25 22 21 13 24 15 11 12 14 16 27 23 1. Attachment Clutch Lever 2. Speed Selector 3. Deflector Remote Control 4. Chute Control 5. Traction Drive Clutch Lever 6. Oil Fill/Dipstick 7. Discharge Chute Deflector 8. Discharge Chute 9. Impeller 10. Clean-Out Tool 11. Auger 12. Auger Gearcase 13. Scraper Blade 14. Recoil Starter Handle 15. Electric Starter 16. Wing Knobs 17. Heated Handles (921003) 18. Remote Wheel Lock (921002) 19.
OPERATION Attachment Clutch - Right Hand Lever WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. 2 WARNING: To avoid injury to hands and feet, always disengage clutches, shut off engine, and wait for all movement to stop before unclogging or working on snow thrower. Keep hands and feet away from auger and impeller. 1 Squeeze Attachment Clutch Lever against handlebar (1) to engage attachment.
IMPORTANT: DO NOT change motion from forward to reverse with clutch engaged. Forward speed can be changed without declutching. 921001 Recoil Starter Handle When pulled, handle will turn engine over. IMPORTANT: DO NOT let handle snap back against starter. Snow Clean-Out Tool (Figure 16) 1 1 6 2 WARNING: Hand contact with the rotating impeller is the most common cause of injury associated with snow throwers. Never use your hand to clean out the discharge chute.
Discharge Chute Crank (921001) IMPORTANT: If chute does not stay in set position, adjust as directed in SERVICE AND ADJUSTMENTS on page 24, or repair before operation. Rotate the Chute with Discharge Chute Crank. 921001 Figure 17 OS7103 Discharge Chute Discharge chute rotates 200°. ALWAYS position discharge chute in safe direction and angle, away from operator and bystanders, before starting engine.
Axle Lock Pin (921001) Runners (Figure 20) Use the axle lock pin to lock or unlock the right or left wheel. Lock both wheels to increase traction; unlock one wheel to allow for easier turning of the unit. NOTE: Unit will not drive with both wheels unlocked. The runners control the distance between the scraper blade and the ground. Adjust runners equally to keep blade level with the ground. Refer to Pre-Start on page 19 for recommended settings. Filling Fuel Tank 921001 WARNING: AVOID INJURY.
5. Fill fuel tank to within 1/2 in. (1.2 cm) below bottom of filler neck with unleaded gasoline. NOTE: Tank capacity is 1 gallon (3.8 liters). 6. Replace Fuel Cap and tighten. 7. ALWAYS clean up any spilled fuel. 6. Check Runners Check and adjust Runners (Runners on page 24). Allow 1/8 in. (3 mm) between scraper blade and hard, smooth surface(s). Allow 1-1/4 in. (30 mm) between scraper blade and uneven or gravel surfaces. 7. Check Engine Fuel & Crankcase Oil Pre-Start 1.
7. Grasp starter handle and pull rope out slowly until it pulls harder. Let rope rewind slowly. 8. Pull rope with a rapid continuous full arm stroke. Let rope rewind slowly. IMPORTANT: DO NOT let Starter Handle snap against Starter. 9. Repeat steps 7 and 8 until engine starts. (If engine does not start, refer to TROUBLESHOOTING on page 36.) 10. Adjust choke as needed. 11. Set throttle to Part Throttle or Slow position for adaptation to outside temperature or travel.
MAINTENANCE 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. WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Service Position WARNING: Before tipping unit up onto housing, remove fuel so no spills will occur. Ensure unit is secure and will not tip over during maintenance.
If clutches do not engage or disengage properly, adjust or repair before operation. See Attachment Clutch/Brake Adjustment on page 27 and Traction Drive Clutch Adjustment on page 30. Clean Engine Refer to Engine Manual for detailed instructions. Check engine oil The engine crankcase oil should be checked 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). Park unit on a level surface.
General Lubrication IMPORTANT: Wipe each fitting clean before and after lubrication. Do not wipe gearcase filler plug; wiping the gearcase filler plug may remove thread sealant and cause leaks. IMPORTANT: DO NOT allow grease or oil to get on friction disc, friction plate or belts. NOTE: Apply Ariens Hi-Temp Grease or equivalent to the lubrication fittings. See SERVICE PARTS on page 35. Sno-Thro should be lubricated (Figure 24) at beginning of season or every 25 operating hours.
SERVICE AND ADJUSTMENTS Shear Bolts WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Scraper Blade IMPORTANT: Damage to auger/impeller housing will result if blade wears down too far. Scraper blade is adjustable to compensate for wear. To adjust scraper blade: 1. Tip unit back onto handlebar, support housing and loosen nuts retaining blade. 2. Adjust runners to fully raised position (housing closest to ground). 3.
5. Check function of remote wheel lock. If wheel lock does not function properly, remove bottom cover to check cable slack. 6. Repeat steps 2 – 4 while watching cable to remove slack. 7. Check function of remote wheel lock. If wheel lock does not function properly, take the unit to Dealer for repairs. 921002, 003, 004 Tighten nut. 1 3 OS7175 No Slack 1 OS7170 2 2 1. Adjusting Nuts 2. Cable Support Bracket 1. Top Jam Nut 2. Bottom Jam Nut 3.
Discharge Chute Deflector (921001) 921002, 003, 004 Deflector must stay in selected position while blowing snow. To adjust, loosen then retighten hardware to desired deflection drag force (Figure 31). Tighten upper adjustment nut. 921001 Discharge Chute Deflector Adjusting Hardware OS7180 Loosen lower adjustment nut. Figure 29 If chute does not rotate freely: Tighten the cable by loosening the upper adjustment nut, and then tightening the lower adjustment nut against the bracket (Figure 30).
8. Adjust pivot pin on the shift rod as necessary so unit travels forward when speed selector is in first forward position and travels backward when speed selector is in first reverse position. 9. Connect the pivot pin to the speed selector arm with the hardware removed in step 1. 921001 4 1 1 2 1 3 OS7186 OS7177 2 2 1. Spring 2. Nut 1. 2. 3. 4. Figure 32 Speed Selector Adjustment To adjust (Figure 33): 1. Disconnect adjustment pivot pin from speed selector lever by removing hair pin. 2.
• If roller is less than 1/2 in. (12.7 mm) from frame, loosen idler adjustment nut and move idler closer to the belt. Tighten adjustment nut and recheck the roller clearance. 1 2 OS7182 OS7184 1. Adjustment Barrel 2. Jam Nut Figure 34 3. With the attachment clutch disengaged, check that the attachment idler arm lightly touches the frame. See Figure 35. With the attachment clutch disengaged, check the attachment idler arm position here. The attachment idler arm should lightly touch the frame.
2 3 1 1/2 – 9/16 in. (12.7 –- 14.3 mm) 4 5 Figure 37 1. 2. 3. 4. 5. OS7184 OS7183 2. Adjust attachment idler position. See Figure 38. a. Loosen idler adjustment nut. b. To increase spring extension, move idler closer to belts and tighten adjustment nut. Return to Step 1. c. To decrease spring extension, move idler away from belts and tighten adjustment nut. Return to Step 1.
2. If there is less than 1/16 in. (1.6 mm) gap between brake pad and belts, follow these steps: a. To increase brake pad gap, loosen idler adjustment nut, and move idler away from belt. Position idler to achieve a 1/16 in. (1.6 mm) minimum brake pad gap and a 1/2 in. (12.7 mm) minimum gap between the plastic roller and the frame. b. Check the clutch cable spring extension and adjust as necessary to achieve a 7/16 – 9/16 in. (11.1 – 14.3 mm) spring extension. c.
921001: 7-1/2 – 8 in. (190.5 – 203.2 mm) 1 2 3 921002, 003, 004: 7 – 7-1/2 in. (177.8 – 190.5 mm) Figure 41 OS7208 OS7206 4. To adjust traction clutch (Figure 42): a. With the traction drive clutch lever disengaged, loosen the jam nut on the cable adjuster. b. Turn the adjuster body up the cable to decrease the distance between the clutch lever and handlebar. c. Turn the adjuster body down the cable to increase the distance between the clutch lever and handlebar. GB - 31 1. Traction Clutch Cable 2.
CAUTION: Always support SnoThro frame and blower housing when loosening the cap screws holding them together. Never loosen cap screws while unit is in service position. 8. Remove hex bolts securing housing to frame (two on each side). Tip housing and frame apart on pivot pin (Figure 44). 9. Remove attachment drive belts from attachment pulley (hold brake away from belt). 921001 OS7144 >1/32 in. (.
2 1 7 2 7 4 3 3 6 5 1. Traction Drive Belt 2. Engine Sheave 3. Attachment Drive Belts 4. Belt Finger 5. Attachment Belt Idler 5 1 6. Attachment Idler Adjustment Nut 7. Traction Belt Idler 6 4 OS7144 Figure 45 1. Spacer 2. Drive Plate Assembly 3. Traction Belt Idler 4. Attachment Drive Belts OS7198 5. Check adjustment.
Friction Disc Replacement 3 1. Shut off engine, remove key, disconnect spark plug wire and allow unit to cool completely. 2. Place unit into service position on a level surface. 3. Remove both wheels. 4. Remove bottom cover by removing six hex bolts. 5. Disconnect pivot pin from the speed selector arm. Save the hardware for reinstallation. 6. Remove spring clip pin nearest drive sprocket from hex shaft. 7. Remove left bearing flange from frame. 8.
SERVICE PARTS STORAGE Order the following parts through your Dealer: Part No. WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Description 00036800 Ariens Hi-Temp Grease (3, 3 oz. cartridges) 21533400 Spark Plug Short Term 07200431 Impeller Belt (2) IMPORTANT: NEVER spray unit with high pressure water or store unit outdoors. Run with attachment clutch engaged a few minutes after each use to free unit of any loose or melting snow. Close fuel shut-off valve.
TROUBLESHOOTING PROBLEM Engine will not crank/start. Engine stops. PROBABLE CAUSE CORRECTION 1. Fuel tank is empty. 2. Fuel shut-off valve closed. 3. Build up of dirt and residue around governor/carburetor. 4. Key Switch not in run position. 5. Electric starter not functioning. 1. Fill fuel tank. 2. Open fuel shut-off valve. 3. Clean area around governor/carburetor. 1. Out of fuel. 2. Fuel shut-off valve closed. 3. Mechanical jam in blower rake or impeller. 1. Fill fuel tank. 2.
SPECIFICATIONS Model Number Description 921001 921002 921003 921004 ST824E ST1027LE ST1130DLE ST924DLE Engine - Tecumseh LH318SA Tecumseh LH358SA Tecumseh LH358SA Tecumseh LH318SA Power Max - HP (kW) 8.0 (5.97) 10.0 (7.46) 11.0 (8.20) 9.25 (6.90) Fast Idle Speed RPM (min-1) Displacement - in. (cc) 3600 ± 150 19.4 (318) 21.8 (358) 21.8 (358) Electric Start 120V Fuel See Engine Manual Tank Capacity - qt (Liters) Snow Clearing Width - in. (cm) 19.4 (318) 4 (3.8) 24 (61.0) 27 (68.
Ariens Limited Warranties 2-Year Limited Lawn and Garden Consumer Warranty Ariens Company (Ariens) warrants to the original purchaser that Ariens and Gravely brand consumer products manufactured by Ariens Company will be free from defects in material and workmanship for a period of two (2) years after the date of purchase, and that Ariens will repair any defect in material or workmanship, and repair or replace any defective part, subject to the conditions, limitations and exclusions set forth herein.
Exceptions, Limitations, Exclusions These warranties are subject to the following conditions, limitations, and exclusions: The following items are excluded from this To obtain warranty service, the following warranty: conditions must be met: • Engines and enty and are not covered by this • The purchaser must perform the warranty. maintenance and minor adjustments • Hydro-Gear transmissions and/or explained in the owner’s manual.
Ariens Company 655 West Ryan Street Brillion, WI 54110-1072 920-756-2141 Fax 920-756-2407 www.ariens.
