CARTRIDGE GP-TURBOCHARGER 7W0489 - Caterpillar

Table 1
Required Tools
Tool Part Number Part Description Qty
A 8H-8581 Feeler Gauge 1 Inspect the Piston and the Piston Rings
Check the piston for wear and other damage.
Check that the piston rings are free to move in the grooves and that the rings are not broken. Inspect the Clearance of the Piston Ring
Remove the piston rings (2). Refer to Disassembly and Assembly Manual, "Pistons and Connecting Rods - Disassemble" for the correct procedure. Clean the grooves (1) and the piston rings (2).
Illustration 1 g01200845
(A) Feeler gauge
(1) Piston grooves
(2) Piston ring
Fit new piston rings (2) in the piston grooves (1). Refer to Disassembly and Assembly Manual, "Pistons and Connecting Rods - Assemble" for the correct procedure.
Check the clearance for the piston ring by placing Tooling (A) between piston groove (1) and the top of piston ring (2). Refer to Specifications, "Piston and Rings" for the dimensions. Inspect the Piston Ring End Gap
Illustration 2 g01344283
(A) Feeler Gauge
(2) Piston ring
(3) Cylinder ring ridge
Clean all carbon from the top of the cylinder bores.
Place each piston ring (2) in the cylinder bore just below the cylinder ring ridge (3).
Use Tooling (A) to measure piston ring end gap. Refer to Specifications, "Piston and Rings" for the dimensions. Note: The coil spring must be removed from the oil control ring before the gap of the oil control ring is measured.