TRANSMISSION
B2650HSDC, B3350HSDC, WSM
2-S47
Neutral Valve
1. Check the holes of the valve body (9) and the neutral valve (4)
for clogging.
2. If clogged, open hole with compressed air.
3. Replace the O-rings (2), (6), (8) and the backup ring (7) for
scratches and damage.
4. Check the springs for breakage and wear.
5. If the valve surface is scored, replace it.
6. If anything is unusual, replace it.
9Y1210822TRS0061US0
Charge Relief Valve
1. Check the spring (2) for breakage and wear.
2. If it is unusual, replace it.
9Y1210822TRS0062US0
Cylinder Block Bore and Pistons
1. Lift all the pistons gently with the retainer plate (1).
2. Check the pistons for their free movement in the cylinder block
bores.
3. If the piston or the cylinder block bore is scored, replace cylinder
block assembly.
• Do not interchange pistons between pump and motor
cylinder block. Pistons and cylinder blocks are matched.
9Y1210822TRS0063US0
(2) Independent PTO Clutch
Checking Bearing
1. Hold the inner race, and push and pull the outer race in all
directions to check for wear and roughness.
2. Apply transmission fluid to the bearing, and hold the inner race.
Then, turn the outer race to check rotation.
3. If there is any problem, replace it.
9Y1210822TRS0064US0
Tightening torque Neutral valve body
59 to 78 N·m
6.1 to 7.9 kgf·m
44 to 57 lbf·ft
(1) Plug
(2) O-ring
(3) Spring
(4) Neutral Valve
(5) Pin
(6) O-ring
(7) Backup Ring
(8) O-ring
(9) Valve Body
(10) Plug
(1) HST Housing
(2) Spring
(3) Poppet
(4) Center Section
Clearance between
piston and bore
Factory specification
0.02 mm
0.0008 in.
Allowable limit
0.04 mm
0.0016 in.
(1) Retainer Plate
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