Product Description
The HBS Brake Master Cylinder (15/904101) is a critical JCB excavator component that converts mechanical force into hydraulic pressure, activating the braking system. Designed for JCB 3CX/4CX models, this master cylinder JCB replacement ensures optimal safety and durability with its cast iron construction and compatibility with mineral oil hydraulic fluid. Key features include exact OEM fit (15/904101 15-904101 15904101), corrosion resistance, and leak-proof performance.
As a trusted brake cylinder kit manufacturer, HBS delivers B2B solutions meeting ISO standards. Ideal for heavy-duty master brake cylinders, fleet maintenance, and OEM-equivalent repairs.
Product Information
Model No |
15/904101 15-904101 15904101 |
Color |
Black |
Material |
Iron cast |
Type |
Brake Cylinder |
Excavator Part |
JCB 3CX/4CX
|
Description |
Brake master cylinder with hydraulic fluid(MINERAL OIL)
|

About HBS
Hipsen(Quzhou) Brake System Parts Co., Ltd (HBS) is a professional manufacturer of auto brake master cylinders. We produce aftermarket parts and provide custom manufacturing services.
Our products have been exported to North America, Europe…etc since 2015. We have been verified with a quality certificate of ISO9001:2015, and the ISO/TS16949 certificate is coming in 2024.
Both the finished products and the production processes have received recognition from the brands we have collaborated with For example, Cardone, Ford Otosan, Polaris, Electra Meccanica, Wildwood, Hayes, and ZongShen.
Why Choose HBS

Numerous models in stock One-year Warranty Friendly Payment Methods
Complete coverage, check in Brake Cylinder Technicians follow the whole after-sales process; Safe payment methods or percentage for you
Provide solutions within three working days can be negotiated
DRIVE WITH CONFIDENCE