Procedure In Replacement Of Primary And Secondary Pulley, Or In Replacement Of Primary Pulley, Secondary Pulley And VARIATOR Chain

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

Measure depth "Lp" from the ST upper face to the primary pulley bearing catch surface at several points and calculate the average.
ST 499575400 GAUGE

Fig 1: Measuring Depth "Lp" From ST Upper Face To Primary Pulley Bearing Catch Surface
Courtesy of SUBARU OF AMERICA, INC.
Measure height "Ls" from the drive pinion retainer upper face to the secondary pulley bearing catch surface at several points and calculate the average.
ST 499575400 GAUGE

Fig 2: Measuring Height "Ls" From Drive Pinion Retainer Upper Face To Secondary Pulley Bearing Catch Surface
Courtesy of SUBARU OF AMERICA, INC.

Calculate the following formula.

Calculation formula:

T (mm) = B + (Lp-Ls) + 31.601 - A

[T (in) = B + (Lp - Ls) + 1.224 - A]

T: Pulley alignment

A: Specified primary pulley dimension

B: Specified secondary pulley dimension

Lp: Depth from the ST upper face to the primary pulley bearing catch surface

Ls: Depth from the ST upper face to the secondary pulley bearing catch surface

15 mm (0.591 in): Thickness of ST

31.601 mm (1.224 in): Constant

SHIM THICKNESS CHART

Select one to two shims so that the total thickness meets the value obtained from step 3).

SHIM THICKNESS CHART