TM 9-2320-209-34-2-2 1. Remove and disassemble boring case gear assembly. Refer to para 17-46. 2. If readingin step 4 of frame 3 is less than 0.008 inch, add 0.008 inch thickness to rack drive gear shim set (1). 3. If readingin step 4 of frame 3 is more than 0.030 inch, take off 0.020 inch thickness from rack drive gear shim set (1). 4. Assemble and replace boring case gear assembly. Refer topara 17-46. 5. Do frame 1 again. GO TO FRAME 5 17-565