Husqvarna 597561604 ZT-3100 Left-hand Transmission

Product Description

The HUSQVARNA 597561604 is a left-hand ZT-3100 hydrostatic transmission assembly designed for zero-turn riding mowers. This unit provides the drive power and directional control for the left-side wheel motor circuit, enabling the independent wheel speed differential that gives zero-turn mowers their characteristic turning radius. Licensed technicians and experienced equipment mechanics handle replacement of this component as part of drivetrain service or repair following transmission failure, fluid leak, or loss of drive on the left side.

This transmission is suited for zero-turn mower applications where the ZT-3100 hydrostatic unit is specified as the original drivetrain component. It is a direct left-hand fitment, meaning it is not interchangeable with the right-hand unit. Typical installation scenarios include replacement after internal failure, seal degradation, or physical damage sustained during field operation. Commercial lawn care operations and residential users with high-hour machines are the most common service contexts.

Key Features

• Left-hand hydrostatic transmission assembly for zero-turn drivetrain systems
• ZT-3100 series unit providing independent wheel drive control
• OEM-specification replacement for factory-installed drivetrain components
• Designed for direct fitment without modification to the mounting position

Compatibility

Designed as an OEM-style replacement left-hand ZT-3100 hydrostatic transmission for HUSQVARNA zero-turn riding mowers originally equipped with this drivetrain configuration. Consult your model's parts diagram to confirm left-hand fitment before ordering.

Installation Notes

Hydrostatic transmission replacement should be performed by a qualified outdoor power equipment technician. Disengage the ignition and disconnect the spark plug wire or battery before beginning any drivetrain service. Drain any residual hydraulic fluid prior to removal and follow the equipment manufacturer's purging procedure after installation to remove air from the hydraulic circuit. Refer to the applicable service manual for torque specifications and fluid type requirements.

Technical Specifications

• Transmission Series: ZT-3100
• Side: Left-Hand

Standard Information

• Brand: HUSQVARNA
• Manufacturer Part Number: 597561604