Detroit Diesel 4000 Series, Service Manual, Page: 228 / 2706

SERIES 4000 12/16V SERVICE MANUAL
2. While rotating the crankshaft 360 degrees, clean any bearing material that may have
transferred to the main bearing journals with extra fine Scotch-Brite™. Clean the block
main bearing cap bore and bearing cap surfaces with extra fine Scotch-Brite. Ensure there
is no damage to the crankshaft, main bearing cap and block. Record findings on the main
bearing installation report form. (Scotch-Brite™ is a trademark of 3M Company.)
3. Clean the new main bearing shells before use. Lubricate the main bearings and bearing
journals with clean engine oil prior to installation. Insert the upper main bearing shell
(1) (one with a hole in the center) onto the crankshaft main bearing journal. With part
numbers facing towards the “A” bank, install bearing alignment tool (2) onto main bearing
cap stud and secure with the main bearing cap nut. See Figure 67.
1. Upper Main Bearing 2. Bearing Alignment Tool
Figure 67 Installing Lower Main Shell
All information subject to change without notice.
C -82
Copyright © DETROIT DIESEL CORPORATION