Seiken parts are often cross-referenced by the OEM part number. If you cannot find the Seiken number, searching the catalogue by the vehicle's OEM number is the most reliable method.
Cost-effective kits containing replacement pistons, springs, and cups to restore internal pressure without replacing the entire cast iron or aluminum cylinder body. Decoding Seiken Part Numbers
| Feature | Seiken | Standard Aftermarket | | :--- | :--- | :--- | | | High-grade Aluminum Alloy / FC Cast Iron | Often lower-grade castings | | Rubber Quality | High-tensile strength, heat resistant | Prone to hardening/cracking faster | | Fitment | Direct OEM Fit (Japanese Specs) | May require modification | | Repairability | Extensive Repair Kit catalogue | Often "replace only" |
The is more than a reference tool—it is a gateway to operational safety and cost efficiency. By understanding how to navigate its sections (masters, slaves, wheels), decode its cross-references, and avoid common mistakes, you transform a simple parts list into a strategic asset.
Finding the exact component you need within a dense industrial catalogue requires a systematic approach. Seiken categorizes its parts using a highly organized numbering system. seiken hydraulic brake amp- clutch parts catalogue
Unlike generic universal parts, Seiken focuses on Original Equipment Manufacturer (OEM) fitment. Their hydraulic brake and clutch components are manufactured using high-grade materials like S45C carbon steel for pistons and NBR (Nitrile Butadiene Rubber) for seals, ensuring resistance to extreme pressures (up to 1,500 PSI in clutch systems) and temperature fluctuations (-40°C to 120°C).
For vehicles equipped with drum brakes, Seiken is a leading manufacturer of wheel cylinders. Their rubber cups are renowned for preventing leaks and enduring high thermal stress.
Before diving into the catalogue numbers, it is important to understand the manufacturer. is a renowned Japanese manufacturer specializing in rubber and hydraulic components. They are a prominent supplier in the Japanese automotive aftermarket (JAM), often acting as an OEM (Original Equipment Manufacturer) supplier for major Japanese vehicle brands like Toyota, Nissan, Honda, and Mitsubishi.
Brake components form the backbone of the Seiken catalog. The brand's development focuses heavily on structural integrity under high thermal and fluid pressure conditions. Seiken parts are often cross-referenced by the OEM
When it comes to the safety, reliability, and performance of a vehicle’s braking and clutch systems, there is little room for compromise. , a Japanese manufacturer established in 1959, has built a global reputation as a premier supplier of high-quality hydraulic brake and clutch components. Originally operating as a laboratory for Meiji Sangyo Company, Seiken has evolved into a leading brand specializing in precision-engineered hydraulic parts, trusted by Japanese OEM manufacturers such as Nissan, Mazda, Toyota, and Hino.
Seiken Chemical Industry Co., Ltd., established in 1959, has dedicated decades to perfecting hydraulic systems. Unlike general parts manufacturers, Seiken's core expertise lies in the nuances of hydraulic pressure, sealing, and fluid dynamics. They are a leading manufacturer of critical components like brake cups, piston seals, and complete hydraulic cylinders, supplying rubber cups and seals to markets worldwide. Their products are developed to meet stringent international standards, including ISO/TS 16949, guaranteeing OEM-grade quality and safety.
The core of Seiken’s reputation lies in its mastery of hydraulic pressure dynamics. The catalogue is divided into two primary safety-critical segments: braking hydraulics and clutch actuation systems. 1. Hydraulic Brake Components
When it comes to automotive braking and clutch systems, aftermarket reliability is paramount. Precision engineering determines whether a vehicle stops safely or shifts gears smoothly. For decades, Japanese manufacturer Seiken Chemical Industry Co., Ltd. has been a global benchmark for OEM-quality hydraulic components. Decoding Seiken Part Numbers | Feature | Seiken
By leveraging Seiken's rigorous Japanese engineering standards and systematically navigating their parts matrix, you can guarantee a perfect, factory-grade restoration of vehicle braking and clutch performance.
Seiken does not always maintain a public-facing global parts catalog. Instead, look in these places:
If you have an original Toyota, Nissan, Isuzu, or Hino part number extracted from a dealership database, the Seiken catalogue contains an Interchange Index at the rear of the book or a search bar in the electronic database. Vehicle Manufacturer Sample OEM Part Number Corresponding Seiken Number Type 47201-3D140 (Master Cylinder) Isuzu 8-97100-010-0 (Wheel Cylinder) Mitsubishi Fuso ME625334 (Clutch Master) Nissan / UD 30610-Z5000 (Clutch Slave) Managing Supersessions and Variations
For specialized rebuilders, Seiken catalogs individual rubber cups using the "SC" prefix, categorized precisely by inner and outer diameter measurements. The Technology Inside the Catalogue: Rubber and Chemistry