Toyota Automatic Transmission A340 Series. Repair Manual - part 19

 

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Toyota Automatic Transmission A340 Series. Repair Manual - part 19

 

 

AT5779

AT5780

AT5781

AT5215

AT8186

(h)

Remove the bearing and race from the front

planetary gear.

34. REMOVE PLANETARY SUN GEAR WITH NO. 1

ONE−WAY CLUTCH

35. CHECK PACK CLEARANCE OF SECOND BRAKE

Using a feeler gauge, measure the clearance between

the snap ring and flange as shown in the figure.

Clearance: 0.50 − 1.76 mm (0.0197 − 0.0693 in.)

If the values are nonstandard, inspect the discs.

(See page  AT−84)

36. REMOVE FLANGE, PLATES AND DISCS OF SECOND

BRAKE
(a)

Remove the snap ring.

(b)

Remove the flange, plates and discs as a set.

−

AUTOMATIC TRANSMISSION (A340F)

Removal of Component Parts

AT−141

AT5782

AT5460

SST

AT5783

AT5784

AT8223

37. CHECK PACK CLEARANCE OF FIRST AND REVERSE

BRAKE
Using a feeler gauge, measure the clearance between

the plate and second brake drum as shown in the figure.

Clearance: 0.50 − 1.02 mm (0.0197 − 0.0402 in.)

38. REMOVE SECOND BRAKE PISTON SLEEVE

39. REMOVE REAR PLANETARY GEAR UNIT WITH SEC-

OND BRAKE DRUM, FIRST AND REVERSE BRAKE

PACK AND OUTPUT SHAFT
(a)

Using SST and screwdriver, remove the snap ring.

SST

09350−30020 (09350−07060)

(b)

Install the output shaft.

(c)

Remove the rear planetary gear, second brake

drum, first and reverse brake pack and output shaft

as an assembly.

(d)

Remove the assembled thrust bearing and race

from the case.

AT−142

−

AUTOMATIC TRANSMISSION (A340F)

Removal of Component Parts

AT4444

AT5258

AT8183

AT8208

AT5107

Leaf

Spring

(e)

Remove the second brake drum assembly.

(f)

Remove the cushion plate, flange, plates and

discs of the first and reverse brake.

For method of inspection, refer to  AT−86.

40. REMOVE LEAF SPRING

41. REMOVE BRAKE DRUM GASKET

42. CHECK PISTON STROKE OF FIRST AND REVERSE

BRAKE
Make sure the first and reverse brake pistons move

smoothly when applying and releasing the compressed

air into the transmission case.

−

AUTOMATIC TRANSMISSION (A340F)

Removal of Component Parts

AT−143

AT5375

AT8335

SST

AT8334

SST

AT8336

SST

Snap Ring

43. REMOVE COMPONENTS OF FIRST AND REVERSE

BRAKE PISTON
(a)

Set SST on the spring retainer, and compress the

return spring.

SST

09350−30020 (09350−07050)

(b)

Remove the snap ring with snap ring pliers.

(c)

Remove the piston return spring.

(d)

Hold No. 2 first and reverse brake piston with hand,

apply compressed air to the transmission case to

remove No. 2 first and reverse brake piston.

(e)

Remove No. 2 first and reverse brake piston.

If the piston does not pop out with compressed air, lift the

piston out with needle−nose pliers.
(f)

Remove the O−ring from No. 2 piston.

(g)

Install SST behind the reaction sleeve and gradually

lift it out on the transmission case.

SST

09350−30020 (09350−07080)

(h)

Remove the O−ring from the reaction sleeve.

(i)

Install SST behind No. 1 brake piston and gradually

lift it out of the transmission case.

SST

09350−30020 (09350−07090)

(j)

Remove the two O−rings from No. 1 piston.

AT−144

−

AUTOMATIC TRANSMISSION (A340F)

Removal of Component Parts

INSTALLATION OF COMPONENT PARTS (A340F)

(See pages  AT−126 to  AT−127)

Disassembly, inspection and assembly of each component group have been indicated in the pre-

ceding chapter. Before assembly, make sure again that all component groups are assembled cor-

rectly.

If something wrong is found in a certain component group during assembly, inspect and repair

this group immediately.

Recommended ATF: DEXRONR II
GENERAL NOTES:

1.

The automatic transmission is composed of highly precision−finished parts, necessitating

careful inspection before assembly because even a small nick could cause fluid leakage or

affect performance.

2.

Before assembling new clutch discs, soak them in automatic transmission fluid for at least

fifteen minutes.

3.

Apply automatic transmission fluid on sliding or rotating surfaces of parts before assembly.

4.

Use petroleum jelly to keep small parts in their place.

5.

Do not use adhesive cements on gaskets and similar parts.

6.

When assembling the transmission, be sure to use new gaskets and O−rings.

7.

Dry all parts with compressed air − never use shop rags.

8.

When working with FIPG material, you must observe the following.

S

Using a razor blade and gasket scraper, remove all the old packing (FIPG) material

from the gasket surface.

S

Thoroughly clean all components to remove all the loose material.

S

Clean both sealing surfaces with a non−residue solvent.

S

Parts must be assembled within 10 minutes of application. Otherwise, the packing

(FIPG) material must be removed and reapplied.

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−145

AT6331

* Assembled bearing and race

Front Bearing Race

Thrust Bearing

Rear Bearing Race

Inner Diameter

Outer Diameter

Inner Diameter

Outer Diameter

Inner Diameter

Outer Diameter

28.1 (1.106)

47.3 (1.862)

28.9 (1.138)

50.2 (1.976)

27.1 (1.067)

41.8 (1.646)

26.0 (1.024)

46.8 (1.843)

24.2 (0.953)

47.8 (1.882)

37.1 (1.461)

59.0 (2.323)

33.6 (1.323)

50.3 (1.980)

36.8 (1.449)

50.9 (2.004)

33.7 (1.327)

47.6 (1.874)

26.0 (1.024)

48.9 (1.925)

26.0 (1.024)

46.7 (1.839)

26.8 (1.055)

47.0 (1.850)

30.6 (1.205)

53.6 (2.110)

32.6 (1.283)

47.7 (1.878)

34.3 (1.350)

47.8 (1.882)

33.7 (1.327)

47.6 (1.874)

35.5 (1.398)

47.7 (1.878)

28.8 (1.134)

44.8 (1.764)

30.1 (1.185)

44.7 (1.760)

27.8 (1.094)

44.8 (1.764)

39.2 (1.543)

57.7 (2.272)

INSTALLATION POSITION AND DIRECTION OF BEARINGS AND RACES

AT−146

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT8209

Reaction Sleeve

No. 1 Piston

AT4467

AT8303

Retainer Claw

SST

Snap Ring

AT8333

No. 2 Piston

AT5429

1.

INSTALL COMPONENTS OF FIRST AND REVERSE

BRAKE PISTON
(a)

Coat three O−rings with ATF.

(b)

Install the two O−rings on No. 1 piston.

(c)

Install the O−ring on the reaction sleeve.

(d)

Install No. 1 piston to the reaction sleeve.

(e)

Coat a new O−ring with ATF and install it on No. 2

piston.

(f)

Install No. 1 piston with the reaction sleeve onto

No. 2 piston.

(g)

Align the teeth of No. 2 piston into the proper

grooves.

(h)

Being careful not to damage the O−rings, press in

No. 2 and No. 1 first and reverse brake pistons into

the transmission case.

(i)

Place the piston return spring onto No. 2 piston.

(j)

Set SST as shown, and compress the return

spring with SST.

SST

09350−30020 (09350−07050)

(k)

Install the snap ring with a screwdriver. Be sure

the end gap of the snap ring is not aligned with

the spring retainer claw.

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−147

AT5107

Leaf

Spring

AT8208

AT8183

AT5784

Inside

Outside

Bearing and

race

39.2 (1.543)

57.7 (2.272)

AT5890

mm (in.)

2.

CHECK PISTON STROKE OF FIRST AND REVERSE

BRAKE
Make sure the first and reverse brake pistons move

smoothly when applying and releasing the compressed

air into the transmission case.

3.

INSTALL LEAF SPRING

4.

INSTALL REAR PLANETARY GEAR UNIT WITH SEC-

OND BRAKE DRUM, FIRST AND REVERSE BRAKE

PACK AND OUTPUT SHAFT
(a)

Install one plate.

(b)

Install the flange, the rounded edge facing forward.

(c)

Re−install the plates and discs.

Install in order: P = Plate D = Disc

D−P−D−P−D−P−D−P−D−P

(d)

Install the second brake drum assembly.

(e)

Coat the assembled bearing and race with petro-

leum jelly and install it onto the case.

HINT: Assembled bearing and race diameter

AT−148

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

 

 

 

 

 

 

 

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