Drive Pinion: Assembly

Tightening torque: 

25 N.m (2.5 kgf-m, 18.4 ft-lb)

Courtesy of SUBARU OF AMERICA, INC.

Preparation tool: 

ST: INSTALLER (20099AE020)

• Pulley side

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• Front differential side

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1. Using the ST and a micrometer, measure the dimension "H1" from the ST end face to the drive pinion (gear portion) end face.

   Preparation tool: 

   ST: GAUGE (499575600)

   Courtesy of SUBARU OF AMERICA, INC.

   (A)	Measurement surface

2. Using the ST and a press, press-fit a new taper roller bearing inner race (front side).

   Preparation tool: 

   ST: INSTALLER (499277200)

   Courtesy of SUBARU OF AMERICA, INC.

3. Using a press, press-fit a new taper roller bearing outer race (A) and a new taper roller bearing (rear side) (B).
   CAUTION: Apply differential gear oil to the roller part of taper roller bearing, and rotate it 20 times or more.
   NOTE: Press in to a position where the taper roller bearing rotates smoothly without play.

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4. Install a new O-ring (B) and the drive pinion collar (A).
   NOTE: Apply the differential gear oil to O-ring.

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5. Tighten the lock nuts using ST1 and ST2.
   CAUTION: Be sure to use a new lock nut.
   NOTE: Tighten the lock nut with ST1 and torque wrench aligned straight.

   Preparation tool: 

   ST1: WRENCH (499787700)

   ST2: HOLDER (18667AA010)

   Tightening torque: 

   TIGHTENING TORQUE SPECIFICATION
   
   

   Calculation formula

   T = 116 N.m (11.8 kgf-m, 85.6 ft-lb) x L/(100 mm (3.94 in) + L)

   T: Tightening torque L: Effective length of torque wrench

   NOTE: If the effective length of the torque wrench used is unknown, consult the manufacturer of the torque wrench.

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   (a)	Effective length of the ST1 (100 mm (3.94 in))
   (b)	Effective length of the torque wrench (L)
   (c)	Center of drive square of the ST
   (d)	Center of drive square of the torque wrench
   (e)	Center of the position where a force is applied by hand

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6. Measure the initial load of the taper roller bearing using the ST and a spring scale.
   CAUTION: Before checking the initial load, apply differential gear oil to the roller part of taper roller bearing, and rotate it 20 times or more to measure the value.
   NOTE: If it exceeds the standard value, replace the taper roller bearing.

   Initial load: 

   1.5 - 4.7 kgf (14.33 - 46.37 N, 3.22 - 10.42 lbf)

   Preparation tool: 

   ST: HOLDER (18667AA010)

   Courtesy of SUBARU OF AMERICA, INC.

7. Crimp the lock nut in 2 locations.

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8. Using the ST and a micrometer, measure the dimension "H2" from the ST end face to the taper roller bearing outer race end face.

   Preparation tool: 

   ST: GAUGE (499575600)

   Courtesy of SUBARU OF AMERICA, INC.

   (A)	Measurement surface

9. Using the following calculation, calculate an appropriate thickness "T" of the drive pinion shim.

T = (H2 - H1) - 6.55 mm (0.258 in)

Tightening torque: 

70 N.m (7.1 kgf-m, 51.6 ft-lb)

Courtesy of SUBARU OF AMERICA, INC.