GAUGE AS-OIL LEVEL (DIPSTICK) 8S3995 - Caterpillar

Assembly Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     139-9039     Retaining Ring Pliers     1    
B     7M-3978     Piston Ring Expander Gp     1    
C     5P-8639     Hydraulic Press (Connecting Rod Bearing)     1    
8F-0024 Hose Assembly     1    
1P-2375 Connecting Coupler     1    
1P-2376 Connecting Coupler     1    
5P-8651 Spacer     1    
5P-8649 Adapter     1    
5P-8650 Bushing Adapter     1    
9U-6600 Hydraulic Pump     1    Note: Prior to removal from the engine, the pistons and connecting rod assemblies were marked. The components must be reassembled together. The components must be installed in the original location in the engine. Do not interchange any of the components.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01171404
Install a new piston pin bearing (4) in connecting rod (6) and remove the old piston pin bearing, as follows:
The connecting rod must be heated for the installation of the piston pin bearing. Do not use a torch.
Illustration 2 g01171408
Raise the temperature of connecting rod (6) along Length (Y) . (Y) Maximum Length ... 85 mm (3.4 inch)
Use Tooling (C) to remove the old bearing and install the new bearing at the same time. The adapter of Tooling (C) should make full contact with the surfaces of the connecting rod.Note: Orient the bearing joint within 5 degrees of either Location (X) .
Allow the connecting rod and the bearing to cool to room temperature.
Use a pin boring machine to machine the bore of the piston pin bearing to the correct diameter.Diameter of piston pin bore ... 55.035 0.008 mm (2.1667 0.0003 inch)
Illustration 3 g01171223
Check the clearance between the ends of piston rings (1) , (2) , and (3) . Refer to Specifications, "Piston and Rings".
Install the spring for oil control piston ring (3) in the oil ring groove of the piston.
Position oil control piston ring (3) over the spring. Position the oil control piston ring so that the gap is 180 degrees from the joint in the spring. Install the oil control piston ring on the piston with Tooling (B) .
Use Tooling (B) to install intermediate piston ring (2) with the side that has the identification "UP-2" toward the top of the piston.
Use Tooling (B) to install top piston ring (1) with the side that has the identification "UP-1" toward the top of the piston.
Position piston rings (1) , (2) , and (3) so the gaps are 120 degrees from each other.
Position piston crown (5) on piston skirt (7) .Note: Ensure that piston pin bearing (4) is in the correct position in connecting rod (6) .
Position the piston on connecting rod (6) . Apply clean engine oil to piston pin (9) and install the piston pin. Use Tooling (A) to install retainer rings (8) . Make sure that the retainer rings are fully seated in the grooves