Drive Pinion Shaft: Assembly

Measure dimension "A" of the drive pinion shaft.
ST 398643600 GAUGE

Fig 1: Measuring Dimension A Of Drive Pinion Shaft Using Gauge ST398643600
Courtesy of SUBARU OF AMERICA, INC.
Using a press, force-fit a new roller bearing in position.
NOTE: If too much pressure is applied, the roller bearing will not turn easily.

Fig 2: Installing Force-Fiting New Roller Bearing
Courtesy of SUBARU OF AMERICA, INC.
After fitting a new O-ring to the shaft, attach the drive pinion collar to the shaft.
Install the lock washer to drive pinion shaft in proper direction.

Tighten a new lock nut with ST1, ST2 and ST3.

Calculate lock washer and lock nut specifications using the following formula.

T2 = L2/(L1 + L2) x T1

T1: 116 N.m (11.8 kgf-m, 85.3 ft-lb)

[Required torque setting]

T2: Tightening torque

L1: ST2 length 0.072 m (2.83 in)

L2: Torque wrench length

Example:

TORQUE WRENCH LENGTH AND TIGHTENING TORQUE SPECIFICATION

ST1 498937110 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER

NOTE: Install ST2 and torque wrench as straight as possible.

Fig 3: Tightening Lock Nut Using Holder ST1-498937110, Wrench ST2-499787700 and Adapter ST3-499787500

Courtesy of SUBARU OF AMERICA, INC.

Measure the starting torque of the bearing. Make sure the starting torque is within the specified range. If out of the allowable range, replace the roller bearing.
Starting torque:

7.6 - 38.1 N (0.776 - 3.88 kgf, 1.7 - 8.6 lb)

Fig 4: Measuring Starting Torque Of Bearing
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Stake the lock nut securely at two places.
Measure dimension "B" of the drive pinion shaft. ST 398643600 GAUGE

Fig 5: Measuring Dimension "B" Of Drive Pinion Shaft
Courtesy of SUBARU OF AMERICA, INC.
The thickness "t" (mm) of the drive pinion shim. t = 6.5+/-0.0625 - (B - A)

Select three or less shims from following table.

DRIVE PINION SHIMS THICKNESS SPECIFICATION

Available drive pinion shims
Part No.	Thickness mm (in)
31451AA050	0.150 (0.0059)
31451AA060	0.175 (0.0069)
31451AA070	0.200 (0.0079)
31451AA080	0.225 (0.0089)
31451AA090	0.250 (0.0098)
31451AA100	0.275 (0.0108)