OUTER RACE & ROLLER ASSEM. 2F5920 - Caterpillar

Illustration 1 g03325320
Table 1
Specification for 307-4407 Piston and 293-5430 Piston
Item Qty Part Specification Description
Before you install piston and rod assembly, apply clean engine oil to the piston skirt, piston lands, and the piston rings.
1 1 294-0309 Piston Ring Install the top piston ring with the "UP-1" side toward the top of the piston.
Width of groove in new piston for the top piston ring 3.60 0.10 mm (0.142 0.004 inch).
Thickness of new top piston ring is 3.465 to 3.490 mm (0.1364 to 0.1374 inch).
When the new top piston ring is installed in a cylinder liner with a bore size of 175 mm (6.9 inch), the clearance between the ends of the piston ring is 0.625 0.125 mm (0.0246 0.0049 inch).
2 1 286-8928 Piston Ring Install the intermediate piston ring with the "UP-2" side toward the top of the piston.
Width of groove in new piston for the intermediate piston ring 3.110 0.010 mm (0.1224 0.0004 inch).
Thickness of new intermediate piston ring is 2.97 to 2.99 mm (0.117 to 0.118 inch).
When the new intermediate piston ring is installed in a cylinder liner with a bore size of 175 mm (6.9 inch), the clearance between the ends of the piston ring is 1.000 0.125 mm (0.0394 0.0049 inch).
3 1 254-2054 Piston Ring Orient the ends of the oil control piston ring 180 degrees from the ring end gap.
Width of groove in new piston for the oil control piston ring 4.060 0.010 mm (0.1598 0.0004 inch).
Thickness of new oil control piston ring is 3.97 to 3.99 mm (0.156 to 0.157 inch).
When the new oil control piston ring is installed in a cylinder liner with a bore size of 175 mm (6.9 inch), the clearance between the ends of the piston ring is 0.5 to 0.8 mm (0.02 to 0.03 inch).
Note : After the piston rings have been installed, rotate the piston rings so that the end gaps are 120 degrees from each other.
4 1 239-6051 Piston Pin Note : Before assembly of the piston pin to the piston, coat the piston pin with clean engine oil.
Outside diameter is 75.000 0.005 mm (2.9528 0.0002 inch).
Inside diameter is 31.0 0.3 mm (1.22 0.01 inch).
Length is 102.00 0.25 mm (4.016 0.010 inch).
Bore in piston for the piston pin is 75.121 0.008 mm (2.9575 0.0003 inch).
Illustration 2 g03325322
Table 2
Item Qty Part Specification Description
5 2 253-1238 Pin Retainer Install the pin retainer with the gap toward the area (6). Refer to Illustration 2.
Thickness of pin retainer is 2.36 0.08 mm (0.093 0.003 inch).
Width of groove in new piston for the pin retainer 2.65 to 2.85 mm (0.104 to 0.112 inch).
Refer to Table 3 for the part numbers of the tools that are used in servicing the piston.
Table 3
Service Tools
Pt. No. Description
271-0504 Piston Ring Expander
255-8897 Piston Ring Compressor
1P-1861 Retaining Ring Pliers