The Ariens 920402 is a professional-grade snow thrower designed for reliable performance in heavy snow conditions. This service manual provides detailed instructions for maintenance, troubleshooting, and repair procedures. Below are key sections covering safety, specifications, maintenance schedules, common repairs, and parts identification.
Key components: Heavy-duty steel auger, Two-stage impeller system, Electric start with recoil backup, 4-cycle engine, Adjustable skid shoes, Chute control with remote deflector, Headlight for visibility, Self-propelled drive with multiple speeds.
| Feature | Description |
|---|---|
| Engine Type | 4-cycle, overhead valve (OHV) |
| Clearing Width | 24 inches |
| Intake Height | 21 inches |
| Drive System | Self-propelled, friction disc |
| Starting System | Electric start (120V) with recoil backup |
| Chute Control | Manual crank with remote deflector |
| Skid Shoes | Adjustable for surface protection |
| Tires | Pneumatic, all-terrain tread |
| Auger Material | Steel with rubber paddles |
| Warranty | Limited 2-year residential warranty |
Always follow safety guidelines to prevent injury or damage.
WARNING! Never attempt to clear clogged chute or auger with hands or feet while engine is running. Use provided clearing tool only.
Regular maintenance ensures optimal performance and longevity.
| Interval | Task |
|---|---|
| Before each use | Check oil level, inspect auger and drive components, test controls |
| Every 5 hours | Check tire pressure, inspect shear pins |
| Every 25 hours | Change engine oil, check spark plug, lubricate control cables |
| Every 50 hours | Replace spark plug, clean air filter, inspect drive belt |
| Season end | Drain fuel or add stabilizer, clean entire unit, store properly |
| Season start | Change oil, check all systems, test operation |
Engine maintenance procedures for optimal performance.
CAUTION! Always disconnect spark plug before servicing engine components.
Maintenance and adjustment of self-propelled drive mechanism.
Service procedures for snow throwing components.
WARNING! Always disconnect spark plug before working on auger/impeller system.
Troubleshooting and service of electrical components.
| Component | Test Procedure | Specification |
|---|---|---|
| Electric Start | Check cord continuity | 120V AC, 10 amp fuse |
| Headlight | Test with multimeter | 12V, 35W bulb |
| Ignition Switch | Check continuity in ON position | 0 ohms resistance |
| Safety Switches | Verify engagement | Must complete circuit |
| Wiring Harness | Inspect for damage | No exposed wires |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel issues, spark plug, safety switch | Check fuel level, spark plug gap, ensure all controls engaged |
| Loss of power | Clogged fuel filter, dirty air filter | Replace fuel filter, clean air filter |
| Auger doesn't turn | Shear pins broken, belt slipped | Replace shear pins, adjust/replace belt |
| Poor throwing distance | Worn impeller, engine RPM low | Inspect impeller, adjust governor to 3400 RPM |
| Drive won't engage | Drive belt worn, cable adjustment | Replace belt, adjust drive cable tension |
| Excessive vibration | Loose bolts, damaged auger | Tighten all bolts, inspect auger for damage |
Key replacement parts for Ariens 920402:
Note: Always use genuine Ariens parts for optimal performance and warranty compliance.
Ariens 920402 comes with a 2-year limited warranty for residential use. Commercial use warranty may differ.
Warranty Coverage: Defects in materials/workmanship. Does not cover normal wear, misuse, or lack of maintenance.
Support Contacts:
Service Centers: Authorized dealers nationwide. Use dealer locator on website.