PISTON AS 3491724 - Caterpillar

Installation Procedure
Table 1
Tool    Part Number    Part Description    Qty    
A     -     Plastigage     -    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Install the connecting rod bearings dry when the clearance checks are made. Put clean engine oil on the connecting rod bearings for final assembly.
Install the upper half of the connecting rod bearing in the connecting rod.
Install the lower half of the connecting rod bearing in the connecting rod.Note: Align the tabs on the back of the connecting rod bearings with the tab grooves in the connecting rod.
Illustration 1 g00487493
In order to check the connecting rod bearing clearance, put Tool (A) on the connecting rod bearing, as shown.
Put clean engine oil (SAE 30) on the connecting rod bolts.
When the connecting rod caps are installed, ensure that the identification marks are aligned.
Illustration 2 g00487412
Note: Do not turn the crankshaft when Tool (A) is positioned.
Ensure that connecting rod (3) is in position on the crankshaft. Install connecting rod cap (2) and connecting rod nuts (1) on connecting rod (3) .
Illustration 3 g00287852
Tighten the connecting rod nuts to a torque of 40 4 N m (30 3 lb ft). Mark the position of the nuts. Tighten each nut for an additional 90 degrees (1/4 turn).
Remove the connecting rod cap. Measure Tool (A) on the bearing surface before Tool (A) is removed. The clearance between the connecting rod bearing and a new crankshaft should be 0.076 to 0.168 mm (.0025 to .0066 inch). The clearance between the connecting rod bearing and a used crankshaft should be 0.25 mm (0.01 inch).
Install connecting rod cap (2) and connecting rod nuts (1) on connecting rod (3). Repeat Step 6 in order to tighten the nuts.
Repeat Steps 1 through 8 for the remaining connecting rod bearings.End By:
Install the oil pan plate. Refer to Disassembly and Assembly, "Engine Oil Pan Plate - Remove and Install".
Install the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Install".