Accumulator

ACCUMULATOR

DESCRIPTION





The 42RLE underdrive, overdrive, low/reverse, and 2/4 clutch hydraulic circuits each contain an accumulator. An accumulator typically consists of a piston, return spring(s), and a cover or plug. The overdrive and underdrive accumulators are located within the transmission case, and are retained by the valve body (Fig. 154).





The low reverse accumulator (Fig. 155) is also located within the transmission case, but the assembly is retained by a cover and a snap-ring.





The 2/4 accumulator is located in the valve body. It is retained by a cover and retaining screws (Fig. 156).

OPERATION
The function of an accumulator is to cushion the application of a frictional clutch element. When pressurized fluid is applied to a clutch circuit, the application force is dampened by fluid collecting in the respective accumulator chamber against the piston and springs. The intended result is a smooth, firm clutch application.