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Home >> Toyota >> 1987 >> Tercel Wagon L4-1452cc 1.5L SOHC (3A-C) >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Service and Repair >> Diassembly and Assembly >> Unit Overhaul >> Center Support Assembly

Center Support Assembly




DISASSEMBLY OF CENTER SUPPORT ASSEMBLY




1. PULL CENTER SUPPORT ASSEMBLY FROM SUN GEAR




2. REMOVE SNAP RING FROM FRONT OF CENTER SUPPORT ASSEMBLY (NO.1 BRAKE)
3. REMOVE CLUTCH FLANGE, DISC AND PLATE (NO.1 BRAKE)




4. COMPRESS PISTON RETURN SPRINGS AND REMOVE SNAP RING
Place SST on spring retainer and compress the springs with a shop press.
Using a screwdriver, remove the snap ring.
SST 09350-20013 (09369-20040)

5. REMOVE SPRING RETAINER AND TWELVE SPRINGS




6. REMOVE NO.1 BRAKE PISTON
Blow compressed air through the center support oil hole to remove the No.1 brake piston.
If the piston does not pop Out, lift it out with needle-nose pliers.

7. REMOVE NO.1 BRAKE PISTON O-RINGS




8. TURN CENTER SUPPORT ASSEMBLY OVER AND REMOVE REAR SNAP RING (No.2 BRAKE).
9. REMOVE CLUTCH FLANGE, DISCS AND PLATES (NO.2 BRAKE)




10. COMPRESS PISTON RETURN SPRINGS AND REMOVE SNAP RING
Place SST on spring retainer and compress the springs with a shop press.
Using a screwdriver, remove the snap ring.
SST 09350-20013 (09369-20040)

11. REMOVE SPRING RETAINER AND TWELVE SPRINGS




12. REMOVE NO.2 BRAKE PISTON
Blow compressed air through the center support oil hole to remove the No.2 brake piston.
If piston does not pop Out, lift it Out with needle-nose pliers.

13. REMOVE NO.2 BRAKE PISTON O-RINGS




14. REMOVE THREE OIL SEAL RINGS FROM CENTER SUPPORT




15. REMOVE ONE-WAY CLUTCH ASSEMBLY AND OIL SEAL RINGS FROM SUN GEAR

INSPECTION OF CENTER SUPPORT ASSEMBLY




1. CHECK OPERATION OF ONE-WAY CLUTCH
Hold the No.2 brake hub and turn the sun gear. The sun gear should turn freely counterclockwise and should lock clockwise.
If the one-way clutch does not work properly, replace it.




2. IF NECESSARY, REPLACE ONE-WAY CLUTCH
a. Bend several tabs back with a tapered punch.
b. Pry off the retainer with a screwdriver. Leave the other retainer on the hub.
c. Remove the one-way clutch.




d. Install the one-way clutch into the brake hub, facing the spring cage toward the front.




e. Hold the brake hub in a vise with soft jaws, and flatten the ears with a chisel.
f. Check to make sure the retainer is centered.

NOTE: Do not allow the discs to dry out. Prepare new discs by soaking them at least two hours in ATF.

ASSEMBLY OF CENTER SUPPORT ASSEMBLY



1. INSTALL TWO OIL SEAL RINGS AND ONE-WAY CLUTCH ASSEMBLY ON SUN GEAR




2. INSTALL THREE OIL SEAL RINGS ON CENTER SUPPORT
Spread rings apart and slip them into the groove. Hook both ends by hand.

NOTE: After installing the oil seal rings. check that they move smoothly.




3. INSTALL NEW O-RINGS ON PISTON

4. INSTALL NO.1 BRAKE PISTON IN CENTER SUPPORT
Press the No.1 brake piston into the center support with the cup side up, being careful not to damage the O-rings.




5. INSTALL TWELVE PISTON RETURN SPRINGS AND SET RETAINER WITH SNAP RING IN PLACE

6. COMPRESS RETURN SPRINGS AND INSTALL SNAP RING IN GROOVE
a. Place SST on the spring retainer, and compress the springs with a shop press.
SST 09350-20013 (09369-20040)

b. Using a screwdriver, install the snap ring.




7. INSTALL NEW O-RINGS ON PISTON AND CENTER SUPPORT

8. TURN CENTER SUPPORT OVER AND INSTALL NO.2 BRAKE PISTON
Press the No.2 brake piston into the center support with the cup side up, being careful not to damage the O-rings.




9. INSTALL TWELVE PISTON RETURN SPRINGS AND SET RETAINER WITH SNAP RING IN PLACE

10. COMPRESS RETURN SPRINGS AND INSTALL SNAP RING IN GROOVE
a. Place SST on the spring retainer, and compress the springs with a shop press.
SST 09350-20013 (09369-20040)

b. Using a screwdriver, install the snap ring.




11. TURN CENTER SUPPORT OVER AND INSTALL NO.1 BRAKE PISTON PLATE. DISC AND FLANGE
Using the low-pressure compressed air (4 - 5 kg/sq.cm, 57 - 71 psi or 392 - 490 kPa), blow all excess ATF from the disc.

Install in order: Plate-disc-flange (rounded edge down)

12. INSTALL SNAP RING IN CENTER SUPPORT
Check that the snap ring ends are not aligned with one of the cutouts.




13. CHECK PISTON STROKE OF NO.1 BRAKE
With a dial indicator, measure the stroke applying and releasing compressed air (4 - 8 kg/sq.cm, 57 - 114 psi or 392 - 785 kPa) as shown.

Standard piston stroke: 0.65 - 1.30 mm (0.0256 - 0.0512 in.)
Maximum piston stroke: 1.30 mm (0.0512 in.)

If the stroke exceeds the limit, the clutch pack is probably worn. If the stroke is less than the limit, parts may be misassembled or there may be excess ATF on the discs.




14. TURN CENTER SUPPORT OVER AND INSTALL NO.2 BRAKE PLATES, DISCS AND FLANGE
Using the low-pressure compressed air (4 - 5 kg/sq.cm, 57 - 71 psi or 392 - 490 kPa), blow all excess ATF from the discs.
Install in order: Plate-disc-plate-plate-disc-flange (rounded edge down)




15. INSTALL SNAP RING IN CENTER SUPPORT
Check that the snap ring ends are not aligned with one of the cutouts.

16. CHECK PISTON STROKE OF NO.2 BRAKE
With a dial indicator, measure the stroke applying and releasing compressed air (4 - 8 kg/sq.cm, 57 - 114 psi or 392 - 785 kPa) as shown.

Standard piston stroke: 0.93 - 1.72 mm (0.0366 - 0.0677 in.)
Maximum piston stroke: 1.72 mm (0.0677 in.)

If the stroke exceeds the limit, the clutch pack is probably worn. If the stroke is less than the limit, parts may be misassembled or there may be excess ATF on the discs.




17. ASSEMBLE CENTER SUPPORT AND SUN GEAR SHAFT
a. Align the brake No.2 disc flukes.
b. Mesh the brake hub with the discs, twisting and jiggling the hub as required.
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