ACCUMULATOR
DESCRIPTION
The 42LE underdrive, overdrive, low/reverse, and
2/4 clutch hydraulic circuits each contain an accumu-
lator. An accumulator assembly typically consists of a
piston, seals, return spring(s), and a cover or plug
(Fig. 150).
The overdrive and underdrive accumulators are
located within the transaxle case, and are retained
by the valve body (Fig. 151).
The low reverse accumulator (Fig. 151) 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.
152).
OPERATION
The function of an accumulator is to cushion the
application of a frictional clutch element. When pres-
surized fluid is applied to a clutch circuit, the appli-
cation 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.
Fig. 150 Accumulator Assembly—Typical
1 - ACCUMULATOR PISTON (UNDERDRIVE)
2 - RETURN SPRINGS
3 - SEAL RING
4 - SEAL RING
Fig. 151 Overdrive, Underdrive and Low/Reverse
Accumulator Location
1 - OVERDRIVE ACCUMULATOR LOCATION
2 - UNDERDRIVE ACCUMULATOR LOCATION
3 - LOW/REVERSE ACCUMULATOR
Fig. 152 2/4 Accumulator Assembly
1 - VALVE BODY
2 - RETAINER PLATE
3 - DETENT SPRING
4 - SPRINGS
5 - SEALS
6 - PISTON
LH TRANSAXLE 21 - 69
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