Husqvarna Z254 Parts Manual

The Husqvarna Z254 is a 54-inch zero-turn riding mower featuring a 26 HP Kohler 7000 Series engine, fabricated 11-gauge steel deck, dual hydrostatic transmissions, and ergonomic controls. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance, repair, and replacement of components. Below are key sections for identification, deck assembly, engine, drive system, controls, and troubleshooting.

Model Identification & Serial Number

Locate the model and serial number plate on the frame under the seat or on the rear fender. This information is required for ordering correct parts.

Identification	Location & Description
Model Number	Z254 (54-inch deck, zero-turn)
Serial Number	Unique 10-digit code on metal plate
Manufacture Date	Encoded in serial number (YYWW format)
Engine Model	Kohler 7000 Series, 26 HP, OHV
Deck Size	54-inch fabricated steel

Safety Parts & Labels

Critical safety components and warning labels that must be maintained and replaced if damaged or illegible.

1. Operator Presence System (OPS): Includes seat switch, wiring harness, and control module.
2. Blade Engagement Switch: PTO switch and relay.
3. Safety Interlock System: Components ensuring mower cannot start unless conditions are met.
4. Warning Decals: Part numbers for replacement decals (engine, deck, operation warnings).

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

Deck Assembly & Blades

54-inch fabricated 11-gauge steel deck with three spindle assemblies and anti-scalp rollers.

• Deck Shell: Main housing, part number 532XXXXXX.
• Spindle Assemblies: Includes spindle, pulley, bearing, and hardware (left, center, right).
• Blades: High-lift mulching blades, part number 532YYYYYY (replace in sets of three).
• Blade Adapters: Connects blade to spindle shaft.
• Deck Belt: Drive belt from engine to deck pulleys, part number 581ZZZZZZ.
• Deck Wheels & Rollers: Anti-scalp rollers and adjustment hardware.
• Deck Lift System: Lift lever, linkage rods, and pivot points.

Engine Components

Kohler 7000 Series, 26 HP, 4-cycle, air-cooled, overhead valve (OHV) engine. Common replacement parts.

Engine Parts (Kohler): Air filter, oil filter, spark plug, fuel filter, carburetor kit, starter motor, ignition coil, battery (12V, 230 CCA).

Maintenance Items: Part numbers for genuine Husqvarna/Kohler filters and plugs.

Component	Part Number	Description
Air Filter	Kohler 52-050-02	Dual-element paper filter
Oil Filter	Kohler 52-050-07	Spin-on filter
Spark Plug	Champion RC12YC	Gap 0.030 inch
Fuel Filter	Husqvarna 532XXXXXX	In-line fuel filter

Drive System & Transmissions

Dual hydrostatic transmissions (EZ™) driving rear wheels independently via drive belts.

1. Hydrostatic Transmissions: Left and right units, part numbers 532AAAAAA and 532BBBBBB.
2. Drive Belts: Main drive belt from engine to transmissions, part number 581CCCCCC.
3. Pump & Motor: Internal hydrostatic pump and wheel motor components.
4. Release Levers: Manual release levers for free-wheeling (transport).
5. Axles & Hubs: Rear axle assemblies and wheel hubs.

Tip: Always relieve tension before removing drive belts. Check belt routing diagram.

Control System & Levers

Dual lap bars for steering and speed control, plus dashboard controls.

Control Parts: Lap bar assemblies, pivot pins, springs, control rods, tension adjusters.

Dashboard: Ignition switch, PTO switch, choke control, hour meter, fuse panel.

Seat & Operator Area: Seat assembly, seat switch, armrests, footrest.

Electrical System & Wiring

12-volt electrical system with battery, starter, alternator, and safety switches.

• Battery: 12V, 230 CCA, part number 532DDDDDD.
• Starter Solenoid: Part number 532EEEEEE.
• Alternator/Charging System: Stator and regulator.
• Wiring Harness: Main harness, part number 581FFFFFF.
• Fuses: 20A and 15A blade fuses.
• Lights (if equipped): Headlight bulbs and wiring.

Frame & Body Parts

Main frame, fenders, deck mounting brackets, and cosmetic parts.

1. Main Frame: Welded steel frame, part number 532GGGGGG.
2. Fenders: Rear fenders and foot plates.
3. Deck Mounting Brackets: Front and rear brackets for deck attachment.
4. Grill & Hood: Front grill and engine cover.

CAUTION! Inspect frame for cracks or damage periodically, especially after impacts.

Wheels & Tires

Front caster wheels and rear drive wheels with pneumatic tires.

Wheel Position	Part Number	Size & Type
Front Caster Wheels	532HHHHHH	13 x 5.00-6, semi-pneumatic
Rear Drive Wheels	532IIIIII	20 x 10.00-8, turf tread
Front Wheel Forks	532JJJJJJ	Caster fork assembly
Valve Stems	Standard TR413	Replace as needed

Fasteners & Hardware

Bolts, nuts, washers, pins, and clips used throughout the mower. Use genuine hardware for proper strength.

Common Hardware Kits: Deck hardware kit, spindle bolt kit, frame bolt kit.

Specifications: Grade 5 or Grade 8 bolts for critical structural and deck attachments.

Parts Ordering & Diagrams

Use exploded-view diagrams and part numbers to order genuine Husqvarna parts.

Symptom / Need	Diagram Reference	Ordering Information
Deck spindle noise	Diagram D-54-3	Order spindle assembly kit (532KKKKKK)
Drive belt worn	Diagram D-54-7	Order main drive belt (581CCCCCC)
Hydrostatic leak	Diagram D-54-12	Contact dealer for transmission seal kit
Control lever loose	Diagram D-54-9	Order pivot bushing kit (532LLLLLL)
Blade replacement	Diagram D-54-2	Order blade set (532YYYYYY)

Ordering: Visit www.husqvarna.com/us/parts or contact an authorized dealer with model and serial number.

Support: 1-800-487-5952; Husqvarna Customer Support