TM 10-3930-660-34 3-9.  CRANKSHAFT MAIN BEARINGS - REPLACE This task covers: a. Removal b. Cleaning c. Inspection d. Installation Initial Setup Tools Tool Kit, Automotive Mechanics Shop Equipment, Automotive Maintenance Common #2, Less Power Fabricated Tool - Bearing Removal/ Installation Tool (App. C, Fig. C-7) Shop Equipment, Automotive Maintenance and Repair; Field Maintenance, Basic, Less Power Equipment Condition Vehicle parked on level ground. Oil pan removed, para. 3-20. Oil suction tube removed, para. 3-21. Materials/Parts Dry Cleaning Solvent P-D-680 (App. B, Item 48) Lint-Free Rags (App. B, Item 38) Lubricating Oil (App. B, Item 26) Lubriplate 105 (App. B, Item 16) REMOVAL 1. CHECK CRAKSHAFT END PLAY. a. End play is controlled by the dimensions of the thrust bearing and crankshaft journal at the number 6 main bearing position. b. Measure  crankshaft  end  play  using  a  dial indicator as shown in this illustration. c. Push  crankshaft  forward,  then  toward  rear of engine.   Record  end  play  measurement. This data will be  needed  later  during  thrust bearing installation. 2. REMOVE MAIN BEARINGS (3 AND 4) FROM MAIN BEARING LOCATIONS 2 THROUGH 6. Bearing  removal  instructions  for  main  bearings  1  and  7 will be covered in the INSTALLATION paragraph. 3-67