Deluxe Series Sno-Thro - Service Manual - Safety, Maintenance and EFI Troubleshooting

Oct 23, 2026

Service manual for Deluxe Series Sno-Thro models including Deluxe 24, Deluxe 28, Deluxe 30 and variants such as Deluxe 28 SHO, Deluxe 30 EFI, and CE/EFI configurations. Covers safety practices, safety decals, operator training requirements, emission control system guidance, and signal word and alert symbol usage. Provides step-by-step service procedures for removing and installing major assemblies: auger, gearcases, impeller, engine, belts, drive idlers, brakes, friction disc, bearings, and chute/gear components. Includes EFI troubleshooting and trouble-code identification for low battery voltage and sensor or RPM related faults, plus diagnostics for non-trouble-code conditions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages76

Reading Time3 h 12 min

AccessFree to download

Safety Practices & Laws

Safety Decal Locations

Safety Decal Descriptions

Safety Rules

Emission Control System

Required Operator Training

Service Procedures

Daining Fuel System and Service Position

Attachment Drive Belt Replacement

Traction Drive Belt Replacement

Drive Idler Assembly Replacement

Attachment Brake and Friction Disc Replacement

Hex Shaft Bearing Replacement

Swing Gate, Auger, Gearcase, Impeller, and Engine Replacement

Traction Drive Cable and Interlock Cam Replacement

Axle and Flange Bushing Replacement

Differential Gear, Chute Gear, Scraper Blade, Headlight, and Battery Replacement

Engine Control Unit (ECU) Replacement and Gearcase Rebuild

EFI Diagnostics and Trouble Code Identification

EFI Trouble Code Diagnostics

Diagnostics for Non-Trouble Codes

Service Record

Service Manual ® Deluxe Series Sno-Thro Models 921045 – Deluxe 24 (SN 100000 +) 921046 – Deluxe 28 (SN 100000 +) 921047 – Deluxe 30 (SN 100000 +) 921048 – Deluxe 28 SHO (SN 100000 +) 921049 – Deluxe 30 EFI (SN 100000 +) 921323 – Deluxe 24 CE (SN 100000 +) 921324 – Deluxe 28 CE (SN 100000 +) ENGLISH 05135630B • 12/19 TABLE OF CONTENTS SAFETY PRACTICES & LAWS EMISSION CONTROL SYSTEM REQUIRED OPERATOR TRAINING SAFETY ALERT SYMBOL SIGNAL WORDS SAFETY DECALS Safety Decal Locations Safety Decal Descriptions SAFETY RULES DRAINING FUEL SYSTEM SERVICE POSITION SEPARATE HOUSING FROM FRAME Remove Auger Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reinstall Auger Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BOTTOM COVER REMOVAL Remove Bottom Cover Install Bottom Cover ATTACHMENT DRIVE BELT REPLACEMENT Remove Attachment Drive Belts Install Attachment Drive Belts TRACTION DRIVE BELT REPLACEMENT Remove Traction Drive Belt Install Traction Drive Belt DRIVE IDLER ASSEMBLY REPLACEMENT Remove Attachment Drive Idler Assembly . . . . . . . . . . . . . . . Remove Traction Drive Idler Assembly. . . . . . . . . . . . . . . . . . Install Traction Drive Idler Assembly . . . . . . . . . . . . . . . . . . . . Install Attachment Drive Idler Assembly . . . . . . . . . . . . . . . . . ATTACHMENT BRAKE REPLACEMENT Remove Attachment Brake Install Attachment Brake FRICTION DISC REPLACEMENT Remove Friction Disc Install Friction Disc HEX SHAFT BEARING REPLACEMENT Remove Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Install Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SWING GATE REPLACEMENT Remove Swing Gate Install Swing Gate Assembly AUGER REPLACEMENT Remove Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Install Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AUGER GEARCASE REPLACEMENT Remove Gearcase Assembly Install Gearcase Assembly IMPELLER REPLACEMENT Remove Impeller Install Impeller ENGINE REPLACEMENT Remove Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Install Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 2 2 2 2 3 3 3 4 7 7 7 7 10 12 12 12 12 12 12 13 13 14 15 15 15 16 17 18 18 18 19 19 21 22 22 22 22 22 24 25 25 27 29 29 30 30 30 31 32 32 33 TRACTION DRIVE CABLE REPLACEMENT Remove Traction Drive Clutch Cable Install Traction Drive Clutch Cable DUAL-HANDLE INTERLOCK CAM REPLACEMENT . Remove Interlock Cam Install Interlock Cams AXLE BUSHING REPLACEMENT Remove Left Axle Bushing Install Left Axle Bushing Remove Right Axle Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . Install Right Axle Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . FLANGE BUSHING REPLACEMENT Install Flange Bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DIFFERENTIAL GEAR REPLACEMENT Remove Differential Gear Install Differential Gear CHUTE GEAR REPLACEMENT Remove Pinion Gear Install Pinion Gear Remove Chute Rotation Gear Install Chute Rotation Gear SCRAPER BLADE REPLACEMENT Remove Scraper Blade Install Scraper Blade HEADLIGHT REPLACEMENT Remove Bulb Install Bulb EFI BATTERY REPLACEMENT Remove Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REPLACE ENGINE CONTROL UNIT (ECU) . . . . . . . . Remove ECU Install ECU GEARCASE REBUILD Disassemble Gearcase Assemble Gearcase EFI TROUBLESHOOTING EFI REPLACEMENT COM

FAQs

What safety instructions must be read before operating or servicing the Sno-Thro unit?

Read the Operator’s Manual and the engine manual provided with the unit at the time of purchase. They contain important safety instructions and information about unit controls.

Which EFI trouble codes are listed in the manual?

The manual lists codes including 16 (Low Battery Voltage), 21 (Barometer Sensor), 22 (Engine Temperature Sensor), 23 (EFI system cannot sustain desired RPM), 27 (Low Fuel Pressure), and 28 (High Battery Voltage).

Are only genuine replacement parts recommended for repairs and service?

Yes. AriensCo recommends using only genuine replacement parts. Using unauthorized parts may adversely affect performance and safety and may void the warranty.

Oct 23, 2026

Upload by Olivia Brown