3-9. CRANKSHAFT MAIN BEARINGS - REPLACE
This task covers:
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,
Vehicle parked on level ground.
Oil pan removed, para. 3-20.
Oil suction tube removed,
Dry Cleaning Solvent P-D-680 (App. B,
Lint-Free Rags (App. B, Item 38)
Lubricating Oil (App. B, Item 26)
Lubriplate 105 (App. B, Item 16)
CHECK CRAKSHAFT END PLAY.
End play is controlled by the dimensions of
the thrust bearing and crankshaft journal at
the number 6 main bearing position.
Measure crankshaft end play using a dial
indicator as shown in this illustration.
Push crankshaft forward, then toward rear
of engine. Record end play measurement.
This data will be needed later during thrust
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.