Toro Model 20372 Parts Manual

The Toro Model 20372 is a commercial-grade zero-turn riding mower designed for professional landscaping and large property maintenance. This parts manual provides detailed diagrams, part numbers, and ordering information for all components, including the engine, cutting deck, drive system, controls, electrical system, and chassis. Below are key sections for identification, assembly groups, exploded views, part lists, and ordering procedures.

Product Identification

Locate the model and serial number plate on the frame, typically near the rear axle or under the seat. Required for accurate parts identification.

Safety Parts & Decals

Critical safety-related components and warning labels. Replace if damaged or illegible.

1. Operator Presence System (OPS) components: seat switch, wiring harness.
2. Blade engagement safety interlock switches.
3. Warning decals: crush points, rotating blades, hot surfaces.
4. Roll-Over Protection Structure (ROPS) hardware (if equipped).

WARNING! Never operate with missing or damaged safety parts. Replace immediately.

Engine Assembly & Components

Complete breakdown of the Kawasaki FX engine and related parts.

1. Engine complete assembly (long block).
2. Air intake system: filter, housing, pre-cleaner.
3. Fuel system: carburetor, fuel pump, lines, tank.
4. Exhaust system: muffler, heat shields, pipe.
5. Cooling system: shrouds, fan, fins.
6. Electrical: starter, alternator, ignition coil, spark plug.

CAUTION! Use only Toro-approved engine parts to maintain warranty and performance.

Cutting Deck Group

• Deck Shell: Fabricated steel, 60-inch width.
• Spindles: Triple spindle assemblies with bearings and seals.
• Blades: High-lift, mulching, or standard (part numbers vary).
• Belt Drive: Deck drive belt, idler pulleys, tension spring.
• Deck Lift: Lift arms, linkage, hydraulic cylinder (if equipped).
• Anti-Scalp Rollers: Front and rear rollers with brackets.
• Skid Shoes: Adjustable wear components.

Drive System & Transaxles

Hydrostatic drive system components. Exploded views show pumps, motors, linkages.

Hydro-Gear Transaxles: Left and right units, including filter, cooling fan, relief valves.

Drive Belts: Main drive belt, pump to engine. Linkage: Control rods, trunnions, neutral return springs. Wheels & Tires: Rear drive tires (23x10.50-12), front casters. Brake: Parking brake assembly, disc, caliper.

Control Group & Operator Station

Steering and operator control components.

1. Turn off engine and remove key before servicing controls.
2. Steering levers: grips, friction pads, pivot pins.
3. Control panel: ignition switch, hour meter, blade engagement switch.
4. Seat: suspension seat, mounting plate, adjustment lever.

Tip: Lubricate control linkage pivots regularly for smooth operation.

Electrical System & Wiring

Complete wiring harness diagram and electrical components.

1. Battery: 12V, group U1, terminals.
2. Wiring harness: main harness, deck harness, engine harness.
3. Switches: ignition, PTO, safety interlock.
4. Solenoids: starter solenoid, PTO clutch.
5. Fuses & Relays: fuse block, main relay.
6. Lights: headlights (if equipped), taillight.

WARNING! Disconnect battery before servicing electrical system.

Chassis, Frame & Wheels

Main frame, axle, and wheel components.

1. Main Frame: welded steel construction.
2. Front Axle: caster yoke, spindle, bushings.
3. Rear Axle: transaxle mounting brackets.
4. Wheels: rear wheel assembly (rim, hub), front caster wheel fork.
5. Tires: specifications and optional turf tires.

CAUTION! Inspect frame for cracks or damage during routine maintenance.

Fasteners & Hardware

Specialty bolts, nuts, washers, and pins used throughout assembly.

Maintenance Parts

Common wear items and service kits.

CAUTION! Use genuine Toro filters and fluids for optimal performance.

Ordering Information & Support

Note: Some parts may be part of a kit; order the complete kit when available.

Service: 1-888-384-9939; www.toro.com