Husqvarna YTH22K42 Parts Manual

The Husqvarna YTH22K42 is a 22 HP Kohler Courage single-cylinder riding lawn tractor with a 42-inch fabricated mower deck, hydrostatic transmission, and electric PTO. This manual provides comprehensive parts identification, diagrams, and ordering information for maintenance and repair. Below are key sections for parts overview, engine components, drive system, cutting deck, electrical system, and troubleshooting.

1. Parts Overview & Diagrams 2. Engine Components 3. Drive System & Transmission 4. Cutting Deck & Blade Assembly 5. Electrical System 6. Controls & Operator Station 7. Frame & Body Parts 8. Belts & Pulleys 9. Fasteners & Hardware 10. Lubrication & Maintenance Parts 11. Parts Ordering & Troubleshooting

Parts Overview & Diagrams

Key assemblies: Engine (Kohler Courage SV590), Hydrostatic Transmission (Tuff Torq K46), 42-inch Fabricated Mower Deck, Electrical System, Controls.

Assembly	Part Number Prefix	Description
Engine	12-XXX-XX	Kohler Courage SV590 22HP components
Transmission	532-XXX-XX	Tuff Torq K46 hydrostatic unit
Mower Deck	532-XXX-XX	42-inch fabricated deck assembly
Blades	532-XXX-XX	High-lift blades (3 required)
Drive Belt	532-XXX-XX	Main drive belt (1/2" x 95-1/2")
PTO Belt	532-XXX-XX	Electric PTO to deck belt (3/8" x 85")
Battery	N/A	12V 280 CCA (Group U1)
Air Filter	12-XXX-XX	Kohler paper element
Oil Filter	12-XXX-XX	Kohler spin-on filter
Spark Plug	12-XXX-XX	Champion RC12YC (gap .030")

Engine Components

Kohler Courage SV590 single-cylinder 22HP engine parts.

Cylinder Head & Valves: Includes head gasket, valves, springs, keepers.
Crankshaft & Piston: Piston rings, connecting rod, crankshaft seals.
Carburetor & Fuel System: Fuel pump, carburetor kit, fuel lines, filter.
Ignition System: Spark plug, ignition coil, flywheel key.
Lubrication System: Oil filter, dipstick, oil drain plug.

WARNING! Disconnect spark plug wire before servicing engine. Use genuine Kohler parts.

Drive System & Transmission

Tuff Torq K46 hydrostatic transmission and drive components.

Transmission Unit: Complete K46 assembly, axle seals, filter.
Drive Belt: Main drive belt (532-XXXX), idler pulleys, tension spring.
Brake System: Brake pedal assembly, brake disc, caliper.
Axles & Wheels: Rear axle shafts, wheel hubs, lug nuts.
Hydrostatic Linkage: Control rod, lever, neutral return spring.

CAUTION! Transmission fluid type: Tuff Torq K46 fluid only. Do not overfill.

Cutting Deck & Blade Assembly

Deck Shell: 42-inch fabricated steel, part number 532-XXXX.
Blade Spindles: Three spindle assemblies (includes bearings).
Blades: High-lift blades, part number 532-XXXX (replace in sets of 3).
Deck Wheels: Anti-scalp wheels and brackets.
Deck Belt: PTO to deck belt, part number 532-XXXX.
Deck Lift: Lift rod, adjustment lever, brackets.
Mandrels: Spindle pulleys, bolts, washers.
Skid Shoes: Wear shoes for deck height adjustment.

Electrical System

12V electrical system with key start, electric PTO, and safety switches.

Battery: 12V 280 CCA, Group U1. Starter: Kohler starter motor. Alternator: Charging system output 15A. Switches: Ignition key switch, PTO switch, seat safety switch. Solenoid: Starter solenoid. Fuses: 20A main fuse, 10A PTO fuse. Wiring Harness: Main harness part number 532-XXXX.

Controls & Operator Station

Steering wheel, seat, pedals, levers.

Turn off engine and remove key before accessing controls.
Steering: Steering wheel, column, tie rods, drag link.
Seat: Seat assembly, suspension, mounting bolts.
Pedals: Brake pedal, drive pedal assembly, return springs.
Levers: PTO engagement lever, deck lift lever, parking brake.

Tip: Lubricate control linkage pivot points annually.

Frame & Body Parts

Supports hood, fenders, footrests.

Hood: Hood assembly, hinges, latch, decals.
Fenders: Rear fenders, mounting brackets.
Footrests: Left and right footrest platforms.
Frame: Main frame rails, crossmembers, reinforcement plates.
Grille: Front grille, screen, mounting clips.
Bumper: Front bumper (if equipped).
Chute: Grass discharge chute, deflector.
Steps: Entry step, grab handles.

WARNING! Ensure frame is secure; check for cracks during maintenance.

Belts & Pulleys

Drive belt, deck belt, idler pulleys, tensioners.

Fasteners & Hardware

Bolts, nuts, washers, pins, clips. Use correct grade hardware.

CAUTION! Replace damaged fasteners; do not reuse lock nuts.

Lubrication & Maintenance Parts

Engine oil SAE 10W-30, transmission fluid, grease, filters.

Parts Ordering & Troubleshooting

Symptom	Possible Cause	Parts Needed
Engine won't start	Bad battery/spark plug	Battery, spark plug, ignition coil.
Poor cutting performance	Dull/damaged blades	Blade set (3), spindle bearings.
Transmission slips/no drive	Worn drive belt	Drive belt, idler pulleys.
Deck vibration	Bent blade/unbalanced spindle	Blades, spindle assembly.
Electric PTO won't engage	Faulty switch/belt	PTO switch, PTO belt, solenoid.

Parts Lookup: Use model number YTH22K42 and serial number for exact parts.

Service: 1-800-HUSKY-62; www.husqvarna.com