MUFFLER GP 7S6741 - Caterpillar

Introduction
The 208-7633 Piston Ring Groove Gauge is used to check the top ring groove of pistons used in C-16 Engines. The gauge is only used on steel-crown, two-piece pistons.The 208-7633 Pistons Ring Groove Gauge Group includes the 208-7633 Piston Ring Groove Gauge, 6V-3073 Storage Case, foam inserts for storage case, NEH0841 Tool Operating Manual, and NEH2941 Storage Case Decal.
Illustration 1. 208-7636 Piston Ring Groove Gauge Group. The 208-7633 Piston Ring Groove Gauge is a Go/NoGo design. If the gauge passes through the top ring groove of the piston, the piston cannot be reused. If the gauge does not pass through the ring groove, the piston can be reused. Checking Procedure
1. Thoroughly clean the top ring groove of the piston.2. Slide the 208-7633 Piston Ring Groove Gauge into the ring groove. The gauge should be aligned with the pin bore, as shwn in Illustration 2.
Illustration 2. Slide Gauge Into Top Ring Groove Aligned With The Pin Bore.3. Turn the guage 90 degrees and check the ring groove again.4. If the gauge does not pass through the ring groove, the piston can be reused.