High Clutch And Reverse Clutch

WARNING: This page is about a different variant/trim than selected.

Install the seal ring and lip seal to the high clutch piston and reverse clutch piston.
Install the high clutch piston to reverse clutch piston.

Fig 1: Identifying Reverse Clutch Piston
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Install the reverse clutch piston to high clutch drum. Align the groove on reverse clutch piston with the groove on high clutch drum during installation.

Fig 2: Installing Reverse Clutch Piston
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Install the spring retainer to high clutch piston.

Fig 3: Installing Spring Retainer
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Install the ST to high clutch piston.
ST 498437000 HIGH CLUTCH PISTON GUIDE

Fig 4: Installing ST To High Clutch Piston
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Install the cover to high clutch piston without folding the high clutch piston seal.
Install the snap ring using ST1 and ST2.
ST1 398673600 COMPRESSOR

ST2 498627100 SEAT

ST3 498437000 HIGH CLUTCH PISTON GUIDE

Fig 5: Installing Snap Ring Using ST1 And ST2
Courtesy of SUBARU OF AMERICA, INC.
Place the dish plate, driven plate, drive plate and retaining plate neatly in this order on surface table.
Set the micro gauge to retaining plate, and read its scale.
NOTE: The value, which is read in the gauge at this time, is zero point.
Scale and record the weight "Z" of a flat board which will be put on retaining plate.
NOTE:
- Use a stiff flat board which does not bend against load.
- Use a flat board of its weight less than 250 N (25.5 kgf, 56.2 lb).
Put the flat board on retaining plate.

Fig 6: Measuring Weight
Courtesy of SUBARU OF AMERICA, INC.
Using the following formula, calculate "N" indicated on the push/pull gauge.
N = 250 N (25.5 kgf, 56.2 lb) - Z

N: Value indicated on push/pull gauge

250 N (25.5 kgf, 56.2 lb): Load applied to clutch plate

Z: Flat board weight
Press the center of retaining plate applying force of N with push/pull gauge, and then measure and record the height A. Make more than three measurements at even distance and take the average value.
NOTE: If three points, measure the height every 120°. If four points, measure the height every 90°.

Fig 7: Measuring Height
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Install the thickest driven plate to piston side, and then install the driven plate, drive plate, retaining plate to high clutch drum.

Fig 8: Installing Thickest Driven Plate
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Install the snap ring to high clutch drum.
Apply compressed air intermittently to check for operation.

Fig 9: Applying Compressed Air
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Measure and record the clearance B between the retaining plate and snap ring. (High clutch) At this time, do not press down the retaining plate.

Fig 10: Measuring Clearance
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Piston stroke calculation

Select the retaining plate within the specification by calculating with A and B dimensions which have been recorded before. If the calculated value exceeds the usage limit, replace the drive plate with a new one and adjust it within the specification.

T = A + B

T: Piston stroke

A: Collapse amount of drive plate

B: Clearance between retaining plate and snap ring

Initial standard:

2.0 - 2.3 mm (0.079 - 0.091 in)

Limit thickness:

2.6 mm (0.102 in)

HIGH CLUTCH RETAINING PLATE

High clutch retaining plate
Part number	Thickness mm (in)
31567AA710	4.7 (0.185)
31567AA720	4.8 (0.189)
31567AA730	4.9 (0.193)
31567AA740	5.0 (0.197)
31567AA670	5.1 (0.201)
31567AA680	5.2 (0.205)
31567AA690	5.3 (0.209)
31567AA700	5.4 (0.213)

Place the dish plate, driven plate, drive plate and retaining plate neatly in this order on surface table.
Set the micro gauge to retaining plate, and read its scale.
NOTE: The value, which is read in the gauge at this time, is zero point.
Scale and record the weight "Z" of a flat board which will be put on retaining plate.
NOTE:
- Use a stiff flat board which does not bend against load.
- Use a flat board of its weight less than 150 N (15.3 kgf, 33.7 lb).
Put the flat board on retaining plate.

Fig 11: Setting Micro Gauge To Retaining Plate
Courtesy of SUBARU OF AMERICA, INC.
Using the following formula, calculate "N" indicated on the push/pull gauge.
N = 150 N (15.3 kgf, 33.7 lb) - Z

N: Value indicated on push/pull gauge

150 N (15.3 kgf, 33.7 lb): Load applied to clutch plate

Z: Flat board weight
Press the center of retaining plate applying force of N with push/pull gauge, and then measure and record the height A. Make more than three measurements at even distance and take the average value.
NOTE: If three points, measure the height every 120°. If four points, measure the height every 90°.

Fig 12: Measuring Height
Courtesy of SUBARU OF AMERICA, INC.
Install the driven plate, drive plate, retaining plate and snap ring.

Fig 13: Installing Driven Plate
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Apply compressed air intermittently to check for operation.

Fig 14: Applying Compressed Air
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Measure and record the clearance B between the retaining plate and snap ring. (Reverse clutch) At this time, do not press down the retaining plate.

Fig 15: Measuring Clearance Between Retaining Plate And Snap Ring
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