GEAR-RING 2G6204 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     2P-5518     Bearing Tool     1    Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01424312
Check main bearing caps (1) for identification marks for the location. The main bearing cap (1) has an arrow on the cap which points to the front of the cylinder block. Each main bearing cap (1) has a number on the cap for the location.
The removal of the main bearing caps for the 3408 and 3412 engines
For the 3412 engine, remove No. 2 through No. 6 main bearing caps (1) from the engine. Remove the lower bearings from the caps.
Repeat the process in order to remove No. 1 and No. 7 main bearing caps (1) .
Remove the thrust plates from each side of the No. 4 main bearing.
For the 3408 engine, remove No. 2 through No. 4 main bearing caps (1) from the engine. Remove the lower bearings from the caps.
Repeat the process in order to remove No. 1 and No. 5 main bearing caps (1) .
Remove the thrust plates from each side of the No. 3 main bearing.
Illustration 2 g00503174
If the crankshaft is turned in the wrong direction, the tab of bearing will be pushed between the crankshaft and the cylinder block. This will cause damage to the crankshaft and block.
Turn the crankshaft until Tooling (A) can be installed in oil hole (2) . Turn the crankshaft in the direction which will remove the upper main bearing.