Wear at the accumulator bores in Aisin Seiki AS66RC and AS69RC units is very common. The B1, B2, K1, K2, and K3 accumulator pistons are all the same size and are used during apply of the clutches to ease the engagement of the apply component. Wear at the valve body bore allows apply oil to exhaust, resulting in harsh or delayed apply, burned clutches, or slipping and flares in the associated gears.
Sonnax B1, B2, K1, K2, K3 accumulator piston kit 122740-13K incorporates an O-ring for positive sealing, even in worn bores. This one kit will work in any of the five bores.
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.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.