Woodward GECO, Technical Manual, Page: 74 / 90

GECO

Stoichiometric Manual 03554
66 Woodward
Excessive oil consumption by the engine will also affect oxygen sensor life—
regular maintenance of piston rings (and valve seals, where applicable) is very
important. Although the sensors are inexpensive, they are damaged by the same
contaminants that will eventually poison the exhaust catalyst. In other words, a
sensor failure may give warning that maintenance is needed before the catalyst
is also damaged.
Supplemental Valve Installation Diagrams
The fuel trim valve may be mounted in any position. The base of the valve
housing has a bolt pattern that is used for mounting or support. There are four
6.9 mm (0.27 inch) diameter holes in a 41.1 mm (1.62 inch) square pattern.
Figure 8-5. Valve Outline Drawing