BLOCK AS 6G6807 - Caterpillar

Installation Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     2P-5518     Bearing Tool     1    
B     -     Plastigage     -    
C     8T-5096     Dial Indicator Group     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g00503404
Typical exampleNote: Ensure that the main bearings are installed so that bearing tabs (3) fit into the notch in the cylinder block and in the main bearing caps.Note: Install the main bearings without lubricant when the check for the crankshaft main bearing clearance is made. Put clean engine oil on the crankshaft main bearings for final assembly.
Install new crankshaft main bearings in the main bearing caps.
Illustration 2 g00503174
Typical example
Install the upper halves of the main bearings in the cylinder block with Tooling (A) .
Illustration 3 g00566702
Typical exampleThe engine is inverted on 4C-9832 Engine Roll-Over Stand .Note: When the bearing clearance is checked and the engine is in an upright position or on a side position, the crankshaft must be supported against the upper halves of the main bearings. This is done in order to get a correct measurement with Tooling (B) . If the crankshaft is not supported, the weight of the crankshaft will cause an incorrect reading. If the engine is inverted it is not necessary to hold the crankshaft upward. Do not rotate the crankshaft when Tooling (B) is installed.Note: Refer to Guideline For Reusable Parts, SEBV0544, "Engine Bearings and Crankshafts" for complete details concerning measuring of bearing clearances.
Use Tooling (B) to check the crankshaft main bearing clearances. Follow Step 5 and Step 6 for the correct installation procedures and tightening procedures for the main bearing caps when the clearance check is performed. Refer to Disassembly and Assembly, "Bearing Clearance - Check".Bearing clearance (new bearings) ... 0.091 to 0.186 mm (0.0036 to 0.0073 inch)Maximum permissible bearing clearance (used bearings) ... 0.25 mm (0.010 inch)
Illustration 4 g00503665
Typical example
Illustration 5 g00503673
Typical exampleNote: Ensure that the numbers on the main bearing caps match the numbers on the cylinder block. The arrows (4) on the main bearing caps are toward the front of the cylinder block.Note: Install the thrust plates with the identification "Block Side" toward the cylinder block.
Lubricate the threads of the main bearing cap bolts with clean engine oil.
Install the main bearing caps in the appropriate order. Follow the tightening procedure in Step 6. 3412EInstall the main bearing caps for No. 2 through No. 6 main bearings. Be sure to install the thrust plates on the No. 4 main bearing cap.Remove No. 1 and No. 7 main