Severe wear of the accumulator bores is very common in Mitsubishi F4A and F5A units. Sonnax accumulator piston kit 41954-02K will improve the sealing in worn bores, while a guide seal will reduce future wear by preventing the piston from contacting the bore. This kit is used with the OE springs and requires no machining.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.