Accumulator: Description and Operation

DESCRIPTION





The 4lte underdrive, overdrive, low/reverse, and 2/4 clutch hydraulic circuits each contain an accumulator. An accumulator typically consists of a piston, seals, return spring(s), and a cover or plug. The overdrive and underdrive accumulators are located within the transaxle case, and are retained by the valve body (Fig. 158) .





The low reverse accumulator (Fig. 159) is also located within the transaxle 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. 160).

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 spring(s). The intended result is a smooth, firm clutch application.