9236591 / 9258610 Swing Reducer Gearbox for Hitachi ZX330-3, ZX350-3, ZX350LC-3

The SPARKLING MACHINERY NEW 9236591/9258610 Swing Reducer Photo:

Why Choose the SPARKLING 9236591/9258610 Swing Reducer?

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • •    - Updated Design: Part 9258610 represents the latest technical revision, offering improved bearing life over the original 9236591.

                                                          •    - High-Strength Pinion: The output shaft is precision-forged to withstand the "shock loading" that occurs when stopping the swing on uneven terrain.

                                                          •    - Superior Sealing: Features high-performance floating seals to prevent gear oil leakage into the swing bearing tub.

                                                          •    - Direct Interchangeability: Fully compatible with original Hitachi mounting bolt patterns and swing motor interfaces.

                                                    •  

Compatible Hitachi Models

This swing reducer is the standard drive for the following 300-series excavators:

Q&A Section

Q1: What is the difference between 9236591 and 9258610?

A: 9258610 is the official replacement part number for 9236591. Hitachi updated the part number to reflect internal component improvements (likely in the bearing or sun gear design), but they are dimensionally identical and fully interchangeable.

Q2: How often should the gear oil be changed in this reducer?

A: For the ZX350-3, Hitachi typically recommends checking the oil level every 250 hours and performing a full change every 1,000 hours. Using high-quality gear oil (API GL-4 or GL-5) is critical for planetary longevity.

Q3: Does this assembly include the swing motor?

A: No. This part number refers specifically to the Swing Reducer (gearbox). The hydraulic swing motor is a separate component that bolts onto the top of this unit.

About SPARKLING MACHINERY:
   - Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.

   Get In Touch:
   - Replace your failing ECU confidently. Contact SPARKLING for pricing, lead time, and technical support — restore optimal machine control quickly and reliably.