Verify that snap ring outside diameter (A) is 26.3 mm (1.04 in.) or less. Measure the clearance between the 22 x 28 mm thrust shim (A) and snap ring (B) with a feeler gauge (C). NOTE: Take measurements in at least three places and use the average as the actual clearance. STANDARD: 0.37-0.65 mm (0.015-0.026 in.) If the clearance is out of standard, remove the 22 x 28 mm thrust shim and measure its thickness.

Select and install the new 22 x 28 mm thrust shim, then recheck. THRUST SHIM, 22 x 28 mm No. Part Number Thickness C 90573-P4V-000 1.15 mm (0.045 in.) D 90574-P4V-000 1.40 mm (0.055 in.) E 90575-P4V-000 1.65 mm (0.065 in.) F 90576-P4V-000 1.90 mm (0.075 in.) G 90577-P4V-000 2.15 mm (0.085 in.) H 90578-P4V-000 2.40 mm (0.095 in.) After replacing the 22 x 28 mm thrust shim, make sure that the clearance is with in the tolerance and the snap ring outside diameter is correct. Install the pitot flange (A) using its cutout (B) as shown to clear the pitot pipes (C).