Husqvarna YTA18542 Parts Manual

The Husqvarna YTA18542 is a 42-inch riding lawn mower featuring a Kohler engine, hydrostatic transmission, and a durable cutting deck. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance, repair, and replacement of components. Below are key sections for identification, engine parts, deck assembly, drive system, controls, and ordering.

Model Identification & Specifications

Locate the model and serial number plate on the frame near the rear axle or under the seat. Key specifications for the YTA18542.

Engine Components

Kohler 5400 Series engine parts list. Always use genuine Husqvarna parts for compatibility.

1. Cylinder & Piston Assembly: Includes piston rings, connecting rod.
2. Crankshaft & Camshaft: Key rotating components.
3. Valve Train: Intake/exhaust valves, springs, pushrods.
4. Fuel System: Carburetor, fuel pump, air filter, fuel lines.
5. Ignition System: Spark plug, ignition coil, flywheel.
6. Lubrication System: Oil pump, filter, dipstick.
7. Cooling System: Cooling fins, fan, shrouds.
8. Exhaust System: Muffler, exhaust pipe, gaskets.

WARNING! Disconnect spark plug before servicing engine. Use proper tools.

Cutting Deck Assembly

42-inch stamped steel deck with three spindles. Parts include blades, spindles, belts, and pulleys.

1. Deck Shell: Main housing, part #532XXXXXX.
2. Blades: High-lift, 42-inch length, part #532XXXXXX (set of 3).
3. Spindle Assemblies: Includes bearings, seals, and housings.
4. Deck Belt: Drive belt for deck engagement, part #532XXXXXX.
5. Idler Pulleys: Tension and guide pulleys.
6. Deck Wheels: Anti-scalp rollers.
7. Deck Lift System: Lift arms, linkage, and adjustment lever.

CAUTION! Ensure deck is disengaged and engine off before servicing.

Drive & Transmission System

• Hydrostatic Transmission: Model T40, part #532XXXXXX.
• Drive Belt: Main drive belt, part #532XXXXXX.
• Axle & Differential: Rear axle assembly, differential gears.
• Brake System: Disc brake, caliper, and pads.
• Steering System: Tie rods, steering shaft, wheel hubs.
• Wheels & Tires: Front and rear tires with rims.
• Drive Pulleys: Engine pulley, transmission input pulley.

Controls & Electrical System

Control panel and wiring components. Refer to wiring diagram for connections.

Key Controls: Ignition switch, throttle lever, deck engagement lever, brake pedal, forward/reverse pedals.

Electrical: Battery (12V), starter motor, alternator, safety switches (seat, brake, PTO), fuses, wiring harness, headlights (if equipped).

Frame & Body Parts

Main frame, body panels, and seating.

1. Main Frame: Welded steel chassis.
2. Fender & Hood: Plastic body panels, part #532XXXXXX.
3. Seat & Seat Mount: High-back seat, suspension, mounting bracket.
4. Footrests & Floor Pan: Metal footplates.
5. Grille & Front Bumper: Protective front assembly.

Tip: Inspect frame for cracks or rust during maintenance.

Fasteners & Hardware

Bolts, nuts, washers, pins, and clips used throughout assembly.

1. Deck Bolts: Grade 5, 1/2-13 x 1.5 inch.
2. Blade Bolts: Special shoulder bolts, part #532XXXXXX.
3. Wheel Lug Nuts: 1/2-20 for wheel attachment.
4. Cotter Pins & Hairpin Clips: For linkage retention.
5. Belleville Washers: For deck tensioning.

WARNING! Use correct torque specifications; overtightening can damage components.

Maintenance Schedule

Regular maintenance parts replacement intervals.

Safety Precautions

Always follow safety guidelines when replacing parts.

CAUTION! Disconnect battery and spark plug before servicing. Use jack stands if lifting. Wear safety glasses and gloves. Ensure all guards are reinstalled after repair.

Parts Ordering Information

To order parts, contact an authorized Husqvarna dealer with your model and serial number. You can also order online at www.husqvarna.com. Have the part number and diagram reference ready.

Note: Parts may vary by production year; verify compatibility using your serial number.

Troubleshooting & Common Replacements

Technical Support: 1-800-487-5962; www.husqvarna.com