1969–1978 Ariens 22000 Series Sno-Thro Snow Blower Parts & Repair Manual (P/N 000138A)

This Ariens 22000 Series Sno-Thro parts and repair manual, P/N 000138A (PRM 22000), covers the listed 1969–1978 tractors and snow-clearing attachments. It combines model-specific exploded parts views with service instructions, adjustments, and troubleshooting.

• Drive-system repair: Tractor and attachment belt replacement, friction-wheel replacement, carrier removal and refitting, and drive spindle housing removal.

• Controls and adjustments: Drive disc, clutch handle, speed selector, shift spring, and chute crank adjustments, with illustrations of the interlock linkage.

• Snow-clearing assemblies: Exploded views and parts lists for the collector housing, rakes, scraper blade, discharge chute, helicon gear, and rotor gearcase.

• Electrical and starting: Interlock wiring diagrams, safety-switch hardware corrections, and Tecumseh electric starter installation instructions with mounting and cord-routing illustrations.

• Troubleshooting: A fault-and-cause chart covering belt failures, gearcase damage, loose friction hubs, poor shifting, loss of drive, and interlock-related engine stopping.

• Parts and lubrication: Model- and serial-specific parts references, engine and belt cross-reference tables, and lubrication instructions for the tractor drive and Sno-Thro attachment.

The illustrated mechanical procedures suit experienced owners and repair technicians comfortable working from parts diagrams; Ariens recommends dealer assistance for maintenance adjustments.

Parts Identification and Engine References

The model-and-serial index directs you to the appropriate parts illustrations before you select components. It distinguishes production changes that a model number alone may not resolve, including an axle-shaft and wheel-hub change on model 922002.

Engine cross-reference tables identify original Tecumseh engines and list replacement engines and short blocks. These are historical parts references, not an internal engine overhaul guide; the lubrication section directs detailed engine questions to the separate engine manufacturer's booklet.

Friction Drive, Belts and Carrier Service

The service section explains belt alignment and drive-disc adjustment alongside the replacement procedures. Drive-belt, belt-finger, and friction-wheel illustrations show the components involved.

Carrier instructions distinguish earlier and later shaft arrangements and describe changes from ratchet-plate retention to cotter pins. That detail helps identify the assembly fitted to the machine before selecting parts or following the applicable service instructions.

The tractor drive belts are specified as matched pairs, and the troubleshooting chart identifies mismatched belts among the causes of failure. The drive spindle housing procedure also warns that forcing a belt over its pulley can cut the belt cords.

Before working on rotating assemblies, disconnect and ground the spark plug wire to prevent accidental starts.

Rakes, Scraper Blade and Gearcase

The attachment drawings show the snow scoop, rake shafts, fan, seals, bearings, and helicon gear components. Earlier parts lists identify the helicon gear and pinion shaft as a set, which matters when ordering replacement drive components.

Service coverage includes runner and scraper-blade adjustment, shear-bolt replacement, and gearcase lubrication. Incorrect shear bolts can defeat the protection provided when a rake jams and damage the gear drive. Gearcase exploded views support parts identification, but this publication does not provide a complete internal gearbox overhaul procedure.

Interlock Wiring and Electric Starter Installation

The interlock wiring plates identify Module T, the key switch, engine ground, magneto connection, and wire colors. They support tracing the shutdown circuit and matching the harness to the illustrated components.

A safety-switch and activator-rod hardware correction applies specifically to models 922012, 922014 and 922016. It addresses loosening taptite screws and identifies replacement hex-head screws 59097 and external-tooth lockwashers 63026.

The Tecumseh 120-volt electric starter section covers bracket installation, switch-box mounting, cord routing, and grounded-power requirements. Its illustrations show the relationship between the starter bracket, blower housing, fuel-tank bracket, and carburetor cover.

Friction-Drive and Gearcase Specification Samples

These examples are a small selection of the adjustment and lubrication data included in the manual.

Friction wheel and attachment belt: The friction-wheel replacement procedure specifies 45–55 ft-lb for the retaining nut. Blower-housing reassembly instructions give a belt-finger clearance of 1/8 inch around the belt, checked with the attachment clutch engaged.

Rotor gearcase: The lubrication section specifies approximately 5 ounces of Ariens Premium Gear Lubricant MP-90 for the Sno-Thro gearcase.

PDF Search, Bookmarks and Page Count

Search and drawing detail: Text search is limited to the safety message on the cover; the parts and service pages are not text-searchable. Two document-level bookmarks provide access to the opening pages, without chapter navigation. Small labels on the interlock wiring plates are readable when enlarged. Printed pagination skips pages 4 and 19, and printed page 11 appears twice.

One printable 59-page PDF contains 58 manual pages, including the cover and the repeated printed page 11, plus one introductory supplemental page. All of these pages are already included in the total.