TRANSAXLE
BX1870,BX2370,BX2670,LA203A,LA243A,RCK48(P),RCK54(P),RCK60B,RCK60D,RCK54D, WSM
2-S40
[4] SERVICING
(1) Hydrostatic Transmission
Center Section
1. Check the center section surface (1) for scratches or wear.
2. If deep scratch or excessive wear is found, replace the
hydrostatic transmission assembly.
9Y1210855TXS0052US0
Charge Relief Valve
1. Check the charge relief valve (1) and the spring (2).
2. If damaged are found, replace it.
9Y1210855TXS0053US0
Check and High Pressure Relief Valve
1. Check the check and high pressure relief valve (4), (5) for
scratches and damage.
2. Check the spring (3) for breakage and wear.
3. If anything are unusual, replace the check and high pressure
relief valve as complete assembly.
• Check and high pressure relief valve (reverse) has a pin
hole (1.5 mm, 0.059 in.).
9Y1210855TXS0054US0
Cylinder Block Assembly
1. Check the cylinder blocks (1) and the pistons (2) for scratches
and wear.
2. If there are scratch or worn, replace the cylinder block
assembly.
3. Check the pistons for their free movement in the cylinder block
bores.
4. If the piston or the cylinder block is scored, replace the cylinder
block assembly.
5. Check the polished face (4) of the cylinder block for scoring. If it
is scored, replace the cylinder block assembly.
• Do not interchange the pistons between the pump cylinder
block and the motor cylinder block. Pistons and cylinder
blocks are matched.
9Y1210855TXS0055US0
(1) Center Section Surface
(1) Charge Relief Valve
(2) Spring
(3) Plug
(1) Plug
(2) O-ring
(3) Spring
(4) Check and High Pressure Relief
Valve (Forward)
(5) Check and High Pressure Relief
Valve (Reverse)
(1) Cylinder Block
(2) Piston
(3) Spring
(4) Polished Face
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