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Control Valves " .
• Replace valve springs if deformed or fatigued.
Control Valves
Check sliding surfaces of valves, sl eeves and plugs. Replace if necessary.
ASSEMBLY
CAUTION:
• Apply ATF to all componen ts before installation.
• Lay control valve body down wh en installing valves. Do not
stand control valve body upright.
Lubricate control valve body and all valves with ATF. Install control
valves by sliding them carefully into their bores.
CAUTION:
• Install each control valve one by one.
• Install control valves after checking, because some of them
are similar.
• Be careful not to scratch or damage valve body. SAT138D
SAT140DA
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AT
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• Wrap a small suitable tool (A) with vinyl tape and use it to insert
valves into their proper positions.
• Install retainer plates (1).
- While pushing plug or return spring, install retainer plate (1) using a suitable tool (A).
1-2 Accumulator Valve • Install 1-2 accumulator valve (1), 1-2 accumulator valve spring and plug. Align 1-2 accumulator retainer plate (2) from opposite side of
control valve body.
• Install 1-2 accumulator valve piston spring (3), 1-2 accumulator
piston (4), plug (5) and retainer plate (6).
Retainer Plate (Control Valve Upper Body) Install proper retainer plates. Unit: mm (in)
Control Valve Lower Body INFOID:0000000004305519
COMPONENTS
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REPAIR FOR COMPONENT PARTS
AT-295
< SERVICE INFORMATION >
D
E
F
G H
I
J
K L
M A
B AT
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DISASSEMBLY
Remove valves at retainer plate.
For removal procedures, refer to AT-289, " Control Valve Upper
Body " .
INSPECTION
Valve Springs • Check each valve spring for damage or deformation. Also measure free length and outer diameter. Refer to AT-374, " Control Valves " .
• Replace valve springs if deformed or fatigued.
Control Valves Check sliding surfaces of control valves, sl eeves and plugs for damage. Replace if necessary.
ASSEMBLY CAUTION:
• Apply ATF to all componen ts before installation.
• Lay control valve body down wh en installing valves. Do not
stand control valve body upright. 19. Retainer plate 20. Accumulator control valve spring 21. Accumulator control valve
22. Plug 23. Retainer plate 24. Retainer plate
25. Shift valve A spring 26. Shift valve A 27. Retainer plate
28. Plug 29. Shuttle plug 30. Shuttle valve spring
31. Shuttle valve 32. Shift valve B spring 33. Shift valve B
34. Plug 35. Retainer plate SCIA4978E
SAT138D
SAT139D
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AT-296< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
Install control valves.
For installation procedures, refer to AT-289, " Control Valve Upper
Body " .
Retainer Plate (Control Valve Lower Body)
Install proper retainer plates. Unit: mm (in)
Reverse Clutch INFOID:0000000004305520
COMPONENTS
DISASSEMBLY SCIA4978E
Lo-
cat- ion Retainer plate designation Width “A” Length “B” Type
L3 Pressure regulator valve 6.0
(0.236) 28.0
(1.102) I
L4 Overrun clutch control valve
L5 Accumulator control valve
L6 Shift valve A
L7 Shuttle valve
L12 Shift valve B 17.0
(0.669) 24.0
(0.945) II
L13 Pressure modifier valve 6.0
(0.236) 28.0
(1.102) I SAT089F
1. Reverse clutch drum 2. D-ring 3. Seal lip
4. Reverse clutch piston 5. Spring retainer assembly 6. Snap ring
7. Dish plate 8. Driven plate 9. Retaining plate
10. Snap ring 11. Drive plate SCIA6939J
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1. Check operation of reverse clutch
a. Install seal rings to drum support of oil pump assembly, and set reverse clutch assembly.
b. Apply compressed air into the oil hole at the location as shown.
c. Check to see that retaining plate moves to snap ring.
d. If retaining plate does not contact snap ring: • D-ring might be damaged.
• Seal lip might be damaged.
• Fluid might be leaking past piston check ball.
2. Remove snap ring (1) using a suitable tool (A).
3. Remove retaining plate, drive plates, driven plates and dish plates.
4. Set Tool (A) on spring retainer assembly, and remove snap ring (1) from reverse clutch drum while compressing spring retainer
assembly.
CAUTION:
Set SST directly over return springs.
5. Remove spring retainer assemb ly from reverse clutch drum.
CAUTION:
Do not remove return springs from spring retainer.
6. Install seal rings to drum support of oil pump assembly (1), and set reverse clutch drum (2). Then apply compressed air into the
oil hole at the location as shown in the figure to remove reverse
clutch piston (3) from reverse clutch drum (2).
CAUTION:
Do not flow air in too quickly or reverse clutch piston (3)
and ATF could jump out. Carefull y flow air in little by little
while protecting with lint-free cloth.
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• Make sure that check balls are not fixed.
• Apply compressed air to check ball oil hole opposite from return spring. Make sure there is no air leakage.
• Apply compressed air to oil hole on return spring side to make sure
that air leaks past ball.
Reverse Clutch Drum Check for deformation or damage. Replace if necessary.
ASSEMBLY 1. Install D-ring (1) and seal lip (2) on reverse clutch piston (3). CAUTION:
Be careful with the di rection of seal lip (2).
2. Install reverse clutch piston by turning it slowly. CAUTION:
Apply ATF to inner surface of reverse clutch drum.
3. Install spring retainer assembly (1) to reverse clutch piston (2). SCIA6000J