Determine initial thickness of shim

TM 9-2520-238-34

REPAIR COOLING FAN RIGHT ANGLE DRIVES A AND B -- Continued

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17. Determine initial thickness of shim (1) as follows:

Without installing shim (1), install spindle assembly (2), laminated shim (3), and bearing retainer housing (4) on

housing (5). Secure with four new key washers (6), and cap screws (7). Tighten screws only to the point where

gear backlash has been removed. Do not bend tabs on key washers at this time.

With a thickness gauge, measure gap between spindle assembly housing (8) and housing (5).

Calculate shim thickness using above measurement as follows: Shim thickness = Gap + 0.006

Peel new laminated shim (1) to calculated thickness or next thinner laminate. Keep removed laminates for later use

in Step 18d below.

Remove four cap screws (7), key washers (6), bearing retainer housing (4), laminated shim (3), and spindle

assembly (2) from housing (5).

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