Toyota Automatic Transmission A340 Series. Repair Manual — part 11
AT5419
3.
INSTALL SECOND COAST BRAKE PISTON OIL SEAL
RING
(a)
Coat the oil seal ring with ATF.
(b)
Contract the oil seal ring once as shown in the dia-
gram, then install it in the piston groove.
NOTICE: Do not spread the ring ends more than neces-
sary.
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AUTOMATIC TRANSMISSION
Component Parts (Second Coast Brake)
AT−77
AT8187
AT4456
AT8381
Race
Race
Front Planetary Gear
Race
Bearing
Bearing
Race
Front Planetary Ring Gear
Front Planetary Gear
COMPONENTS
INSPECTION OF FRONT PLANETARY GEAR
1.
CHECK FRONT PLANETARY RING GEAR BUSHING
Using a dial indicator, measure the inside diameter of
the planetary ring gear bushing.
Maximum inside diameter: 24.08 mm (0.9480 in.)
If the inside diameter is greater than the maximum, re-
place the planetary ring gear.
2.
MEASURE PLANETARY PINION GEAR THRUST
CLEARANCE
Using a feeler gauge, measure the planetary pinion gear
thrust clearance.
Standard clearance: 0.20 − 0.60 mm
(0.0079 − 0.0236 in.)
Maximum clearance: 1.00 mm (0.0394 in.)
If the clearance is greater than the maximum, replace the
planetary gear assembly.
AT−78
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AUTOMATIC TRANSMISSION
Component Parts (Front Planetary Gear)
AT8440
Hold
Turn
Free
Lock
AT8188
AT4457
Sun Gear Input Drum
Oil Seal Ring
Snap Ring
Assembled No. 1 One−Way
Clutch and Second Brake
Hub
Snap Ring
Planetary Sun Gear
Thrust Washer
Planetary Sun Gear and No. 1 One−Way Clutch
COMPONENTS
DISASSEMBLY OF PLANETARY SUN GEAR AND
NO. 1 ONE−WAY CLUTCH
1.
CHECK OPERATION OF NO. 1 ONE−WAY CLUTCH
Hold the planetary sun gear and turn the second brake
hub. The second brake hub turns freely clockwise and
locks counterclockwise.
2.
REMOVE ASSEMBLED NO. 1 ONE−WAY CLUTCH
AND SECOND BRAKE HUB
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AUTOMATIC TRANSMISSION
Component Parts (Planetary Sun Gear
and No. 1 One−Way Clutch)
AT−79
AT8189
AT8190
AT7897
AT8182
AT1642
3.
REMOVE THRUST WASHER FROM SUN GEAR INPUT
DRUM
4.
REMOVE OIL SEAL RINGS
5.
REMOVE SUN GEAR INPUT DRUM FROM PLAN-
ETARY SUN GEAR
(a)
Use a wooden block, etc. as work stand.
(b)
Using snap ring pliers, remove the snap ring.
(c)
Remove the sun gear input drum from the plane-
tary sun gear.
6.
REMOVE SNAP RING FROM PLANETARY SUN
GEAR
AT−80
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AUTOMATIC TRANSMISSION
Component Parts (Planetary Sun Gear
and No. 1 One−Way Clutch)
AT8181
AT8189
AT8182
AT7897
AT8337
INSPECTION OF PLANETARY SUN GEAR
CHECK PLANETARY SUN GEAR BUSHINGS
Using a dial indicator, measure the inside diameter of
the planetary sun gear bushings.
Maximum inside diameter: 27.08 mm (1.0661 in.)
If the inside diameter is greater than the maximum, re-
place the planetary sun gear.
ASSEMBLY OF PLANETARY SUN GEAR AND
NO. 1 ONE−WAY CLUTCH
1.
INSTALL SNAP RING TO PLANETARY SUN GEAR
2.
INSTALL SUN GEAR INPUT DRUM
(a)
Place a wooden block, etc. as a work stand and
place the planetary sun gear onto it.
(b)
Install the sun gear input drum onto the planetary
sun gear.
(c)
Install the snap ring with snap ring pliers.
3.
INSTALL OIL SEAL RINGS
(a)
Coat the two oil seal rings with ATF.
(b)
Install the two oil seal rings onto the planetary
sun gear.
NOTICE: Do not spread the ring ends too much.
HINT: After installing the oil seal rings, check that they
rotate smoothly.
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AUTOMATIC TRANSMISSION
Component Parts (Planetary Sun Gear
and No. 1 One−Way Clutch)
AT−81
AT1643
Upward
AT8440
Turn
Hold
Free
Lock
AT1642
4.
INSTALL THRUST WASHER
HINT: Make sure that the lug shapes match the holes
on the sun gear input drum.
5.
INSTALL ASSEMBLED NO. 1 ONE−WAY CLUTCH
AND SECOND BRAKE HUB ONTO PLANETARY SUN
GEAR AS SHOWN
6.
CHECK OPERATION OF NO. 1 ONE−WAY CLUTCH
Hold the planetary sun gear and turn the second brake
hub. The second brake hub turns freely clockwise and
locks counterclockwise.
AT−82
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AUTOMATIC TRANSMISSION
Component Parts (Planetary Sun Gear
and No. 1 One−Way Clutch)
AT8184
AT6388
♦ Non−reusable part
Second Brake Piston
♦ O−Ring
Snap Ring
Piston Return Spring
Snap Ring
Second Brake Drum
Thrust Washer
Spring Retainer
Disc
Piston Sleeve
S SUPRA
S CRESSIDA
Plate
Disc
3VZ−E
S TRUCK
S 4 RUNNER
Piston Sleeve
Plate
Snap Ring
Second Brake
COMPONENTS
DISASSEMBLY OF SECOND BRAKE
1.
REMOVE THRUST WASHER FROM SECOND BRAKE
DRUM
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AUTOMATIC TRANSMISSION
Component Parts (Second Brake)
AT−83
AT8185
AT8196
AT6455
Printed
Number
AT8439
AT8438
SST
2.
CHECK SECOND BRAKE PISTON MOVEMENT
Make sure the second brake piston moves smoothly
when applying and releasing low−pressure compressed
air to the second brake drum.
3.
REMOVE PISTON RETURN SPRING
(a)
Place SST on the spring retainer, and compress
the return spring with a shop press.
SST
09350−30020 (09350−07040)
(b)
Using snap ring pliers, remove the snap ring.
(c)
Remove the spring retainer.
(d)
Remove the piston return spring.
4.
REMOVE SECOND BRAKE PISTON
(a)
Hold the second brake piston with hand, apply com-
pressed air to the second brake drum to remove the
second brake piston.
(b)
Remove the second brake piston.
HINT: If the piston is at an angle and cannot be removed,
press down on the side jutting out and again apply com-
pressed air, or else wind vinyl tape around the piston end
and remove it with needle−nose pliers.
(c)
Remove the two O−rings from the piston.
INSPECTION OF SECOND BRAKE
1.
INSPECT DISC, PLATE AND FLANGE
Check to see if the sliding surface of the disc, plate
and flange are worn or burnt. If necessary, replace
them.
HINT:
S
If the lining of the disc is peeling off or discolored,
or even if parts of the printed numbers are de-
faced, replace all discs.
S
Before assembling new discs, soak them in ATF
for at least fifteen minutes.
AT−84
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AUTOMATIC TRANSMISSION
Component Parts (Second Brake)
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