Husqvarna Caster Cap Spring OEM #591425101

Keep your Husqvarna zero-turn mower’s front caster assembly performing exactly as it was designed with the Genuine OEM Caster Cap Spring #591425101. This factory-correct spring is a critical component of the front caster fork system on Husqvarna MZ and MZT series zero-turn mowers, providing the retention force that keeps the caster spindle bearing seated, protected, and operating smoothly through every mowing session.

The caster spindle extends from the caster fork and is disposed in a bearing housing coupled to the frame of the mower, with the caster wheel assembly designed to rotate about a vertically oriented caster axis. The cap spring sits at the top of this assembly, applying consistent downward retention pressure that keeps the bearing properly seated and prevents unwanted vertical play in the spindle — reducing caster wobble, uneven steering, and premature bearing wear.

Designated the “Cap Spring MZ/MZT Caster Raw,” this part is the factory-matched replacement specifically engineered for the MZ and MZT caster fork design. The “raw” designation indicates an uncoated, unpainted finish — exactly as originally installed. This same part is also used across the RedMax equipment line under the same part number, making it a multi-brand OEM component.

As a genuine Husqvarna OEM part, #591425101 meets the exact spring rate, diameter, and material specification Husqvarna engineers into their commercial-grade zero-turn caster systems. Aftermarket substitutes often vary in spring tension or dimensions, leading to improper bearing retention and accelerated wear — a risk entirely avoided with the genuine replacement.

Key Features:

• Genuine Husqvarna OEM part — factory-engineered for MZ and MZT series zero-turn mowers
• Retains the caster spindle bearing under load for smooth, stable front wheel rotation
• Reduces caster wobble and spindle play for improved steering feel and turf tracking
• Raw (uncoated) finish — factory-correct specification
• Also fits RedMax equipment using OEM part #591425101
• Sold individually

OEM Part Number: 591425101 Brand: Husqvarna / RedMax Part Type: Caster Cap Spring Compatible Equipment: Husqvarna MZ and MZT Series Zero-Turn Mowers Finish: Raw (Uncoated)