The core product is the Hitachi EX35 Carrier Roller, with main part numbers 4392416 and 9101720. It features cross-brand high interchangeability – compatible with multiple John Deere and Hitachi mini excavators – and can be replaced without removing the rubber tracks, significantly lowering maintenance barriers.

1. Compatible Models: Covers Hitachi EX/ZX Series Mainstream Mini Excavators

As an aftermarket replacement, this carrier roller precisely fits the following Hitachi mini excavator models, meeting maintenance needs across scenarios:

Hitachi EX Series: EX20UR-1, EX27U, EX29U, EX30-1, EX30-2, EX30UR-1, EX30UR-2, EX33MU, EX33U, EX35-1, EX35-2, EX35U, EX40, EX40UR-1, EX40UR-2, EX45, EX45-2, EX50, EX50U, EX55UR, EX55UR-2, EX55UR-3, EX58MU

Hitachi ZX Series: ZX27U, ZX30U, ZX35U, ZX40U, ZX50U (serial number range: S/N 50001-7000), ZX60USB-3

2. Core Specs for 9101720 Carrier Roller: Must-Verify Parameters Before Purchase

Key dimensional parameters for the 9101720 carrier roller (ensure consistency with original parts):

Shaft Diameter: 30mm

Body Diameter: 80mm

Shaft Length: 42mm (with a 5mm-wide collar)

Body Length: 112mm

3. Product Function & Installation Advantages: Practical & Efficient

1. Core Function

Mounted on the top of the undercarriage, centered on the track, this carrier roller’s key role is to support track weight and prevent the track from sagging into the track frame. It ensures track stability during equipment travel and operation, avoiding abnormal noise or wear caused by loose tracks.

2. Easy Installation

No additional hardware required: No need to purchase bolts, washers, or other accessories separately – directly reuse the equipment’s existing mounting structure.

Simple operation: Just loosen and remove the old roller, slide the new roller into the mounting position, and tighten to secure. A single person can complete the replacement, saving maintenance time.

4. Hitachi OEM Alternative Part Numbers: Flexible Procurement Options

The following Hitachi dealer part numbers correspond to this carrier roller (identical in function and size, select based on stock availability):4392416, 4357784, 9101720

5. Critical Fitment Reminder: Notes to Avoid Wrong Purchases

Some models have serial number segment differences – please pay special attention:

If your equipment’s serial number falls within a specific segment, you may need part numbers 4718355 or 9239529 instead of 4392416/9101720.

Before purchasing, verify your equipment’s original part number and complete serial number. For fitment questions, contact us directly to ensure precise part matching.