902306-920010 Hydraulic Breaker Seal Kit — Furukawa FX25 Rock Hammer
The FX25 belongs to Furukawa’s small breaker series (Fx15a/Fx25a/Fx35a), built specifically for mini excavators, skid steer loaders, and compact utility loaders in the roughly 0.5–8 ton carrier range. Unlike larger Furukawa breakers, the FX25 uses a mono-block body with no separate cylinder, front-head, or thru-bolts — a design that eliminates a common failure point on other breaker types (thru-bolt loosening and torque maintenance), but also means the seal package inside the single-piece body has to handle the full brunt of piston impact and hydraulic cycling without those additional structural supports.
This seal kit is built to match the FX25’s mono-block internal profile, supplying the seals responsible for containing pressure around the piston and preventing hydraulic bypass during high-frequency striking. Because the FX25 uses a replaceable cylinder liner rather than requiring full body replacement when wear occurs, a proper seal kit paired with liner inspection is typically the core of a full rebuild on this model — rather than a full breaker teardown.
Key Features & Benefits
Demolition-Grade Material Durability
Formulated with premium-grade Polyurethane (PU) and heavy-duty Nitrile Rubber (NBR) compounds to endure the high-frequency impacts and hydraulic pressure spikes generated by the FX25’s advanced hydraulic circuit design.
Matched to Mono-Block Construction
Engineered to the FX25’s specific internal profile tolerances — important given the mono-block design leaves less margin for seal mismatch compared to breakers with separate cylinder and front-head assemblies.
Complete Rebuild Solution
Includes a fully matched set of step seals, buffer seals, dust wipers, and O-rings, aligned with the FX25’s piston and valve arrangement.
Extended Service Life
Outstanding thermal stability and wear resistance, suited to the nitrogen-charged backhead operation that gives the FX25 its increased impact energy.
Technical Specifications
Brand Compatibility: Furukawa
Applicable Model: FX25 / FX25a (small breaker series, also covers related Fx15a/Fx35a family where seal profiles match)
Carrier Range: Approx. 0.5–8 ton mini excavators, skid steers, and compact utility loaders
Pure Part Number SKU (Internal): 902306, 920010
OEM Reference Part Number(s): 902306-920010
Description: Hydraulic Breaker Seal Kit for Furukawa FX25
Important Fitment & Ordering Note
Furukawa has produced several revisions within the Fx15a/25a/35a small breaker line, and seal profiles are not always interchangeable across sub-models or production years even within the FX25 designation. Please cross-check your breaker’s model plate, serial number, or existing seal profile against OEM specifications before ordering. If you’re unsure, contact our team with your breaker’s serial number for verification — this is worth doing given the mono-block design offers no room for a near-fit substitute.
Reviews
There are no reviews yet.