HEAD 7W9389 - Caterpillar

pistons of the engine have a keystone design ring groove. The piston rings are a keystone ring. The 3114 Engine and the 3116 Engine requires the 4C-8164 Piston Ring Groove Gauge in order to check the top ring groove in the piston. Refer to the instruction card for correct use of the 4C-8164 Piston Ring Groove Gauge. The 3126 Engine requires the 186-0137 Piston Ring Groove Gauge Gp in order to check the top ring groove in the piston. Refer to the instruction card for correct use of the 186-0137 Piston Ring Groove Gauge Gp .Refer to Guideline For Reusable Parts And Salvage Operations, SEBF8049, "Pistons" for more information.