Thrust Bearing Preload

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

Select a suitable adjusting washer No. 1 to adjust dimension (H) to zero through visual check. Position the washer (18.3 x 30 x 4) and lock washer (18 x 30 x 2) and install the lock nut (18 x 13.5).

Fig 1: Adjusting Washer
Courtesy of SUBARU OF AMERICA, INC.
Using the ST1, ST2 and ST3, tighten new lock nut to the specified torque.
ST1 899884100 HOLDER

ST2 498427100 STOPPER

ST3 899988608 SOCKET WRENCH (27)

Tightening torque:

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

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.
ST1 899884100 HOLDER

ST3 899988608 SOCKET WRENCH (27)

Starting torque:

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

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 the adjusting washer No. 2 from following table, and recheck the starting torque.

Fig 4: Identifying Adjusting Washers

Courtesy of SUBARU OF AMERICA, INC.

PART NUMBER AND THICKNESS SPECIFICATION CHART

When the specified starting cannot be obtained by the adjusting washer No. 2, select new adjusting washer No. 1 and recheck starting torque.

Fig 5: Identifying Adjusting Washer

Courtesy of SUBARU OF AMERICA, INC.

PART NUMBER AND THICKNESS SPECIFICATION CHART

STARTING TORQUE, DIMENSION H AND WASHER NO. 1

Starting torque	Dimension H	Washer No. 1
Low	Small	Select thicker one.
High	Large	Select thinner one.

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