Mack ASET AC - Main Bearing Cap Installation

REPAIR INSTRUCTIONS, PART 1
Page 287
322
Figure 322 — Main Bearing Insert Part Numbers and Locations
5. Apply a light coat of clean engine oil on the
insert surfaces and on the crankshaft main
bearing journals.
Due to the considerable weight of the
crankshaft, extreme care must be observed
during installation. No nicks, scratches,
burrs, or any other kinds of distress are
acceptable on the main bearing and/or
crankshaft journals and fillets.
6. Using a suitable lifting device, position the
crankshaft in the cylinder block.
Main Bearing Cap Installation
[212 HH]
Unfinished main bearing caps are available for
servicing the engines. The bores of these caps
are undersize for service rebore:
앫 Cap, Intermediate and Front Main Bearing
(Semi-Finished), No. 223GB2131M
앫 Cap, Rear and Center Main Bearing
(Semi-Finished), No. 223GB2132
1. Upper Insert — 646B348; Lower Insert — 646B343
2. Upper Insert — 646B345; Lower Insert — 646B343
3. Upper Insert — 646B345; Lower Insert — 646B343
4. Upper Insert — 646B349; Lower Insert — 646B344
5. Upper Insert — 646B345; Lower Insert — 646B343
6. Upper Insert — 646B345; Lower Insert — 646B343
7. Upper Insert — 646B350; Lower Insert — 646B344
5-111.bk Page 287 Monday, July 10, 2006 2:26 PM