The Husqvarna RZ4623 is a 46-inch zero-turn riding mower featuring a powerful engine, durable cutting deck, and ergonomic controls designed for efficient lawn maintenance. This parts manual provides detailed information on component identification, replacement parts, assembly diagrams, and maintenance procedures to ensure proper operation and longevity of your mower. Below are key sections covering parts lists, diagrams, ordering information, and maintenance guidelines.
Key components: Engine assembly, Cutting deck, Drive wheels, Steering levers, Seat, Fuel tank, Battery, and Safety switches.
| Component Group | Description |
|---|---|
| Engine Assembly | Includes engine, muffler, air filter, and mounting hardware |
| Cutting Deck | 46-inch welded steel deck with blades, spindles, and belt drive |
| Drive System | Hydrostatic transmissions, drive belts, and axle components |
| Controls | Steering levers, throttle, ignition switch, and brake pedal |
| Operator Station | Seat, seat switch, and control panel |
| Electrical System | Battery, starter, wiring harness, and safety switches |
| Fuel System | Fuel tank, fuel lines, fuel filter, and carburetor |
| Safety Components | Blade brake clutch, seat sensor, and deck guards |
| Wheels & Tires | Front caster wheels and rear drive tires |
| Frame & Body | Main frame, fenders, and hood |
Refer to engine model number for specific parts. Common parts include:
WARNING! Disconnect spark plug wire before servicing engine. Allow engine to cool.
46-inch deck parts list:
CAUTION! Ensure deck is disengaged and blades are stopped before servicing.
Access control parts via operator area. Seat: Includes seat cushion and mounting brackets. Steering Levers: Lever arms, friction pads, and linkage. Ignition Switch: Key-operated switch. Brake & Clutch: Brake pedal assembly and blade engagement lever.
Safety Switches: Seat sensor, parking brake switch, and PTO switch.
Adjustments: Lever tension, pedal height, and seat position.
Battery: 12V; maintain terminals clean. Starter: Electric starter motor. Wiring Harness: Color-coded connectors. Fuses: Check fuse block for blown fuses. Lights: Headlights (if equipped).
Tip: Keep battery charged and terminals corrosion-free.
Supports gasoline operation.
WARNING! No smoking near fuel. Drain fuel before storage.
Regular maintenance ensures optimal performance. Follow schedule in owner's manual.
Blade Brake Clutch: Stops blades when disengaged. Deck Guards: Shield around deck opening. Seat Sensor: Prevents operation without operator. Rollover Protection (if equipped): ROPS structure.
CAUTION! Never operate with missing or damaged safety parts.
Use model and serial numbers when ordering. Parts available through authorized Husqvarna dealers. For support, visit www.husqvarna.com or contact 1-800-487-5962. Warranty: Refer to original warranty for coverage details.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, spark, or battery | Check fuel level, spark plug, and battery charge; replace faulty parts. |
| Poor cutting quality | Dull blades or deck wear | Sharpen or replace blades; level deck; check spindle bearings. |
| Loss of drive power | Worn belts or linkage | Inspect drive belts for wear; adjust or replace; check control linkage. |
| Excessive vibration | Unbalanced blades or loose parts | Balance or replace blades; tighten deck bolts and spindle nuts. |
| Hydrostatic transmission issues | Low fluid or air in system | Check fluid level; bleed air from system per manual. |
Reset: Refer to service manual for hydraulic system reset procedures.
Service: 1-800-487-5962; www.husqvarna.com