Thrust Bearing Preload

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Select a suitable adjusting washer No. 1 so that dimension (H) will be zero in a visual check. Position the washer (18.3 x 30 x 4) and lock washer (18 x 30 x 2) and attach the lock nut. (18 x 13.5)

Fig 1: Thrust Bearing Preload Adjustment
Courtesy of SUBARU OF AMERICA, INC.
Using the ST1, ST2 and ST3, tighten the lock nut to the specified torque.
NOTE: Use new lock nuts and lock washers.

Tightening torque:

120 N.m (12.2 kgf-m, 88.5 ft-lb)

ST1 899884100 HOLDER

ST2 498427100 STOPPER

ST3 899988608 SOCKET WRENCH (27)

Fig 2: Tightening Lock Nut Using ST1, ST2 And ST3
Courtesy of SUBARU OF AMERICA, INC.
After removing the ST2, measure the starting torque using torque driver.
Starting torque:

0.3 - 0.8 N.m (0.03 - 0.08 kgf-m, 0.2 - 0.6 ft-lb)

ST1 899884100 HOLDER

ST3 899988608 SOCKET WRENCH (27)

Fig 3: Measuring Starting Torque Using Torque Driver
Courtesy of SUBARU OF AMERICA, INC.

If the starting torque is not within the specified limit, select new adjusting washer No. 1 and re-check starting torque.

Fig 4: Adjusting Washer No. 1 And No. 2

Courtesy of SUBARU OF AMERICA, INC.

PARTS THICKNESS SPECIFICATION CHART

Adjusting washer No. 1
Part No.	Thickness mm (in)
803025051	3.925 (0.1545)
803025052	3.950 (0.1555)
803025053	3.975 (0.1565)
803025054	4.000 (0.1575)
803025055	4.025 (0.1585)
803025056	4.050 (0.1594)
803025057	4.075 (0.1604)

If the specified starting torque cannot be obtained by the selection of adjusting washer No. 1, select adjusting washer No. 2 from the list below. Repeat steps 1) through 4) to adjust starting torque.

Fig 5: Adjusting Washer No. 1 And No. 2

Courtesy of SUBARU OF AMERICA, INC.

STARTING TORQUE SPECIFICATION CHART

Starting torque	Dimension H	Adjusting washer No. 2
Low	Small	Select thicker one.
High	Large	Select thinner one.

PARTS THICKNESS SPECIFICATION CHART

Adjusting washer No. 2
Part No.	Thickness mm (in)
803025059	3.850 (0.1516)
803025054	4.000 (0.1575)
803025058	4.150 (0.1634)

Recheck that the starting torque is within the specified range, then crimp the lock nut at four positions.

CAUTION: When crimping the lock nut, be careful not to crack it.