Page 322 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-65
8. REMOVE O-RING FROM FORWARD CLUTCH DRUM
9. REMOVE 3 OIL SEAL RINGS
FORWARD CLUTCH INSPECTION
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:
If the lining of the disc is peeling off or discolored, or
even if a part of the printed numbers are defaced, re-
place all discs.
Before assembling new discs, soak them in ATF for
at least 15 minutes.
2. CHECK FORWARD CLUTCH PISTON
(a) Check that the check ball is free by shaking the piston.
(b) Check that the valve does not leak by applying low-pres-
sure compressed air.
AT05R-06
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A340E(Others) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-66
3. CHECK FORWARD CLUTCH DRUM BUSHING
Using a dial indicator, measure the inside diameter of the
forward clutch drum bushing.
Maximum inside diameter:
24.08 mm (0.9480 in.)
If the inside diameter is greater than the maximum, re-
place the forward clutch drum.
FORWARD CLUTCH ASSEMBLY
1. INSTALL OIL SEAL RINGS
(a) Coat the 3 oil seal rings with ATF.
(b) Install the 3 oil seal rings to the forward clutch drum
groove, then snug them down by squeezing their ends to-
gether.
NOTICE: Do not spread the ring ends more than necessary.
HINT: After installing the oil seal rings, check that they ro-
tate smoothly.
2. INSTALL NEW O-RING TO FORWARD CLUTCH DRUM
Coat a new O-ring with ATF and install it on the forward
clutch drum.
3. INSTALL FORWARD CLUTCH PISTON
(a) Coat new O-rings with ATF and install them on the for-
ward clutch piston with a screwdriver.
(b) Being careful not to damage the O-rings, press the clutch
piston into the forward clutch drum with both hands.
4. INSTALL PISTON RETURN SPRING
(a) Install the piston return spring.
AT05S-08
Page 324 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-67
(b) Place SST on the spring retainer, and compress the re-
turn spring with a shop press.
SST 09350-30020 (09350-07040)
(c) Install the snap ring with snap ring pliers. Be sure the end
gap of the snap ring is not aligned with the spring retainer
claw.
5. INSTALL CUSHION PLATE ROUNDED END DOWN
6. INSTALL PLATES, DISCS AND FLANGE
(a) Install in order: P = Plate D = Disc
P-D-P-D-P-D-P-D-P-D
(b) And then install the flange, the rounded edge facing
downward.
HINT: There are 8 different thicknesses for the flange.
Flange thickness
mm (in.)
No.ThicknessNo.Thickness
613.0 (0.118)443.8 (0.150)
603.2 (0.126)424.0 (0.157)
453.4 (0.134)634.2 (0.165)
623.6 (0.142)644.4 (0.173)
(c) Install the snap ring with a screwdriver. Be sure the end
gap of the snap ring is not aligned with the cutout portion
of the forward clutch drum.
Page 325 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-68
7. CHECK PACK CLEARANCE OF FORWARD CLUTCH
Using SST and a dial indicator, measure the forward
clutch piston stroke while applying and releasing com-
pressed air (392-785 kPa, 4-8 kgf/cm
2, 57-114 psi).
SST 09350-30020 (09350-06120)
Pack clearance:
0.5-0.9 mm (0.020-0.035 in.)
If the values are non-standard, inspect the discs.
8. INSTALL DIRECT CLUTCH TO FORWARD CLUTCH
(a) Make sure that the thrust washer is installed to the direct
clutch drum.
(b) Align the flukes of discs in the direct clutch.
(c) Install the direct clutch onto the forward clutch.
(d) Check that the distance from the direct clutch end to the
forward clutch end is 71.2 mm (2.803 in.).
If the distance is less than the above value, parts may
have been assembled incorrectly, check and reassemble
again.
Page 330 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONPLANETARY SUN GEAR -
AT-73
PLANETARY SUN GEAR
COMPONENTS
PLANETARY SUN GEAR AND NO.1
ONE-W AY CLUTCH DISASSEMBLY
1. CHECK OPERATION OF NO.1 ONE-WAY CLUTCH
Hold the planetary sun gear and turn the second brake
hub. Check that the second brake hub must be able to
turn freely clockwise and locks counterclockwise.
2. REMOVE ASSEMBLED NO.1 ONE- WAY CLUTCH
AND SECOND BRAKE HUB
AT05V-03
AT05W-04
Page 332 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONPLANETARY SUN GEAR -
AT-75
PLANETARY SUN GEAR INSPECTION
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.
PLANETARY SUN GEAR AND NO.1
ONE-W AY CLUTCH ASSEMBLY
1. INSTALL SNAP RING TO PLANETARY SUN GEAR
2. INSTALL SUN GEAR INPUT DRUM
(a) Place a wooden block or similar, 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 2 oil seal rings with ATF.
(b) Install the 2 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 ro-
tate smoothly.
AT05X-03
AT05Y-07
Page 333 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONPLANETARY SUN GEAR -
AT-76
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
6. CHECK OPERATION OF NO.1 ONE-WAY CLUTCH
Hold the planetary sun gear and turn the second brake
hub. Check that the second brake hub must be able to
turn freely clockwise and locks counterclockwise.
Page 341 of 2543
A340E(Others) AUTOMATIC TRANSMISSIONREAR PLANETARY GEAR -
AT-84
REAR PLANETARY GEAR
COMPONENTS
REAR PLANETARY GEAR, NO.2 ONE-WAY
CLUTCH AND OUTPUT SHAFT
DISASSEMBLY
1. REMOVE OUTPUT SHAFT FROM REAR PLANETARY
GEAR ASSEMBLY
2. REMOVE OIL SEAL RING FROM OUTPUT SHAFT
AT065-03
AT066-05