Exhaust Rocker Arms with Oil Spray for Fuel Injector Solenoids on C7 and C9 On-highway Engines{1123, 1290} Caterpillar

Engine:

C7 (S/N: C7S1-UP)

C9 (S/N: C9S1-UP; MFF1-UP)

Introduction

The problem that is identified in the technical information bulletin that follows does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

In order to extend the life of fuel injectors on the above listed engines, the injector solenoids need to remain cool.

Solution

Illustration 1	g01404067
Hole in exhaust rocker arm for oil spray

The system was developed in order to provide a stream of engine oil to the injector solenoids. The design uses the existing oil supply from the valve mechanism. The oil spray is directed out of the exhaust rocker arms. There is one 0.7 mm (0.028 inch) hole (1) in each exhaust rocker arm.

Note: When you are servicing the valve mechanism, the oil ports must remain free of debris.

Illustration 2	g01404069
(2) Location of oil spray