Sno-Thro ® Owner/Operator Manual Model 920001 - ST624E ENGLISH FRANÇAIS 01990600 6/07 Printed in USA
TABLE OF CONTENTS SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SERVICE PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . 23 CONTROLS and FEATURES . . . . . . . . . . . . . . . . . 9 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DELIVERY WARNING: Improper assembly or adjustments can cause serious injury. Customer Note: If you have purchased this product without complete assembly and instruction by your retailer, it is your responsibility to: 2. Understand all Safety Precautions provided in the manuals. 1. Read and understand all assembly instructions in this manual. If you do not understand or have difficulty following the instructions, contact your nearest Ariens Dealer for assistance.
SAFETY DECALS AND LOCATIONS 2. DANGER! ALWAYS replace missing or damaged Safety Decals. Refer to figures below for Safety Decal locations. 2 OS6610 1 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. 3. DANGER! 3 ROTATING PARTS. Keep clear of auger while engine is running. OS2080 Figure 2 • Read Operator’s Manual.
Check for weak spots on docks, ramps or floors. Avoid uneven work areas and rough terrain. Stay alert for hidden hazards. ROTATING IMPELLER CAN CAUSE SERIOUS INJURY. NEVER ATTEMPT TO UNCLOG OR CLEAN UNIT WHILE ENGINE IS RUNNING. DO NOT operate near drop-offs, ditches, or embankments. Unit can suddenly turn over if a wheel is over the edge of a cliff or ditch, or if an edge caves in. Read, understand, and follow all instructions in the manual and on the machine before starting. Falling snow, fog, etc.
DO NOT operate on steep slopes. DO NOT clear snow across the face of slopes. Keep all movement on slopes slow and gradual. DO NOT make sudden changes in speed or direction. Use a slow speed to avoid stops or shifts on slopes. Avoid starting or stopping on a slope. DO NOT park unit on a slope unless absolutely necessary. When parking on a slope always block the wheels. ALWAYS shut off engine, remove key, and close fuel shut-off valve or drain fuel when transporting unit on a truck or trailer.
ASSEMBLY . 1 WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. 2 WARNING: Dropping or tipping over boxed unit could result in personal injury or damage to unit. 3 PACKAGE CONTENTS 3 2 1. Shift Rod 2. Wing Knob and Bolt 3. Wing Nut and Bolt 4. Handlebar 4 4 Figure 4 1 OS8025 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. 3.
2. Connect the chute crank to the pinion gear on chute with spring clip pin. Check Auger Gearcase Oil Check oil level in auger gearcase (see Check Auger Gearcase on page 15). Check Engine Crankcase Oil IMPORTANT: The engine is shipped with 5W-30 oil in crankcase. Refer to Engine Manual for detailed instructions. 1 Fill Engine Fuel Tank Refer to Engine Manual for proper fuel type and tank capacity. Check Function of all Controls 2 Ensure unit runs and performs properly. Refer to Operation.
CONTROLS AND FEATURES 1. Attachment Clutch Lever 3 2. Speed Selector 3. Traction Drive Clutch Lever 2 1 4. Chute Crank 5. Muffler Guard 4 6. Discharge Chute Deflector 7. Discharge Chute 5 8. Impeller 9. Auger 26 10. Scraper Blade 6 11. Auger Gearcase 14 13 7 12. Clean-out Tool 12 13. Oil Fill and Dipstick 14. Gas Tank and Cap 8 24 15. Starter Button 16. Electric Starter 17. Recoil Starter Handle 18. Primer Bulb 22 19. Throttle (Engine Stop) 9 11 23 10 20.
OPERATION Ignition Switch (Push/Pull Safety Key) WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Key Switch has two positions: 1. “Stop” - pulled out 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. 2. "Run" - pushed in 2 NOTE: DO NOT twist key after it is inserted.
Push deflector handle forward or down to throw snow lower. Pull deflector handle up or to the rear to throw snow higher. Throttle 1 The throttle controls the engine speed. To increase or decrease the engine speed, adjust to: 2 1. Fast (normal or warm starts) 3 4 2. Part-Throttle IMPORTANT: If Chute Deflector does not stay in set position, adjust as directed in SERVICE AND ADJUSTMENTS on page 16, or repair before operation. 3. Slow (cold weather starts) Discharge Chute 4.
5. Fill fuel tank to within 1/2 in. (1.2 cm) below bottom of filler neck with unleaded gasoline. Scraper Blade The scraper blade allows the back of the housing to keep better contact with the surface being cleared. It also prevents damage to the housing from normal wear. NOTE: Tank capacity is 3.5 qt (3.3 L) 6. Replace Fuel Cap and tighten. 7. ALWAYS clean up any spilled fuel. IMPORTANT: DO NOT allow Scraper Blade to wear too far or Auger/Impeller housing will become damaged. PRE-START 1.
TO STOP IN AN EMERGENCY 2. Plug extension cord into 120V 3-wire, grounded outlet. Immediately release both control levers to stop unit in an emergency. Stop engine, remove key and wait for all rotating parts to stop before leaving operator’s position. 3. Turn discharge chute straight ahead. 4. Make sure that the traction clutch and attachment drive clutch levers are fully disengaged. 5. Push Primer Bulb 2 or 3 times for cold engine.
3. Engage wheel drive clutch without engaging attachment drive clutch. To clear an area, run unit in an overlapping series of paths. For large areas, start in the middle and throw snow to each side, so snow is not cleared more than once. TRANSPORT ALWAYS direct snow away from area to be cleared and with direction of the wind. TRAVELING ALWAYS shut off engine, remove key, and close fuel shut-off valve when transporting unit on a truck or trailer.
Wheels must stop quickly when traction drive clutch lever is released. 1 If clutches do not engage or disengage properly, adjust or repair before operation (see Attachment Clutch/Brake Adjustment on page 19 and Traction Drive Clutch Adjustment on page 21). 2 CHECK CLUTCH SPRING ADJUSTMENT Make sure the attachment clutch and traction drive clutch are adjusted to the range specified in Attachment Clutch/Brake Adjustment on page 19 andTraction Drive Clutch Adjustment on page 21. 1. Auger Gearcase 2.
SERVICE AND ADJUSTMENTS 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. 2 Scraper blade is adjustable to compensate for wear. To adjust scraper blade: 2 1. Tip unit back onto handlebar, support housing and loosen nuts retaining blade 1. Auger 2. Shear Bolts 2. Adjust runners to fully raised position (housing closest to ground). 1 OS7150 Figure 15 3.
NOTE: If first forward speed is too fast, disconnect adjustment pivot pin from speed selector arm. Rotate pivot pin to move it up the shift rod a maximum of two turns and reconnect pivot pin to speed selector arm. 3 4 1 2 1 1 1. Spring 2. Nut 2 Figure 17 OS7177 2 SPEED SELECTOR ADJUSTMENT 1. Shift Rod 2. Adjustment Pivot Pin 3. Speed Selector Arm 4. Hairpin Figure 18 To adjust (Figure 18): 1. Disconnect adjustment pivot pin from speed selector arm. Save hardware for reinstallation. 2.
7. Remove hex bolts securing housing to frame (two on each side). Tip housing and frame apart on pivot pin. 1 3 2 4 8. Remove attachment drive belt from lower pulley (hold brake away from belt). 1 3 8 4 2 7 5 1. Pinion and Gear 2. Belt Cover 1. Attachment Drive Belt 2. Engine Sheave 3. Traction Drive Belt 4. Traction Belt Idler 3. Spring Pin 4. Chute Crank Figure 19 OS8062 6 5. Attachment Pulley 6. Attachment Idler Nut 7. Attachment Belt Idler 8.
NOTE: To gain belt clearance, remove swing gate spacer (Figure 22) so drive plate can be slid over until finger is out of frame and drive plate can swing past stop hole in frame. See Figure 23. NOTE: Make sure drive plate spring remains connected to the frame and drive plate. 5. Replace attachment drive belt (See Replace Attachment Drive Belt on page 18).
Adjust the Attachment Clutch Cable Spring Extension With the attachment clutch disengaged, check the attachment idler arm position here. The attachment idler arm should lightly touch the frame. 1. Check the attachment clutch cable spring extension. Measure the length of the attachment clutch cable spring with the clutch lever disengaged. Then measure the attachment clutch spring with the clutch lever engaged. See Figure 27. The spring should be 1/2 – 9/16 in. (12.7 – 14.
b. Check the clutch cable spring extension and adjust as necessary to achieve a 1/2 – 9/16 in. (12.7 – 14.3 mm) spring extension. c. If the cable needed adjustment, recheck gaps described in step 1. Repeat steps as necessary until brake clearance, roller gap and spring extension are within specified ranges. IMPORTANT: If adjustments cannot be brought into specified ranges see your Dealer for repairs. 6 2 1 3 Check Belt Finger Clearance (Figure 30) 1.
2. Place the unit into the service position on a level surface. Traction Clutch Lever 7-1/2 – 8 in. 3. Remove lockpins from wheel axles and remove wheels. (19.0 – 20.3 cm) 4. Remove bottom cover by removing six hex bolts. 5. Disconnect pivot pin from the speed selector arm. Save the hardware for reinstallation. Figure 31 6. Remove spring clip pin nearest drive gear from hex shaft. OS2490 7. Remove left bearing flange from frame. To adjust traction clutch (Figure 32): 8.
13. Insert new friction disc assembly into frame. Install washers onto carrier bearing and slide into speed selector arm. To treat the fuel system for storage: 1. Add fuel stabilizer according to manufacturers’s instructions. 14. Slide hex shaft through new friction plate assembly. Install pinion gear and washer onto hex shaft and slide shaft into right bearing. 2. Run engine for at least 10 minutes after adding stabilizer to allow it to reach the carburetor. 15.
TROUBLESHOOTING PROBLEM Engine will not crank/start. Engine stops. PROBABLE CAUSE CORRECTION 1. Fuel tank is empty. 1. Fill fuel tank. 2. Fuel shut-off valve closed. 2. Open fuel shut-off valve. 3. Build up of dirt and residue around governor/carburetor. 3. Clean area around governor/carburetor. 4. Key Switch not in run position. 4. Put Key Switch into run position. 5. Electric starter not functioning. 5. Check for a bad starter or connections. 1. Out of fuel. 1. Fill fuel tank. 2.
SPECIFICATIONS Model Number 920001 ST624E Description Engine - Tecumseh OH195SA Power Max - HP (kW) 6.0 (4.5) Maximum RPM 3600 ± 150 Displacement - in. (cc) 11.88 (195) Electric Start 120V Fuel See Engine Manual Tank Capacity - qt (Liters) 3.5 (3.3) Snow Clearing Width - in. (cm) 24 (61.0) Chute Rotation Angle 186° Impeller Diameter - in. (cm) Speed - RPM-Max (min 12 (30.5) -1) 1200 Auger Diameter - in. (cm) Speed - RPM- Max (min 11.0 (27.
Ariens Company 655 West Ryan Street Brillion, WI 54110-1072 920-756-2141 Fax 920-756-2407 www.ariens.
