"THIS SERVICE INFORMATION BULLETIN ANNOUNCES A DESIGN CHANGE TO THE OIL PRESSURE SWITCH ASSEMBLY. NICKEL PLATING HAS BEEN APPLIED TO THE INTERNAL SWITCH CONTACTS TO ENHANCE THEIR DURABILITY AND REDUCE THE POSSIBILITY OF POOR CONTACT WHICH COULD AFFECT OPERATION OR CAUSE IMPROPER ILLUMINATION OF THE OIL
PRESSURE WARNING LAMP. A SMALL PILOT PORTION WAS ADDED TO THE THREADED AREA ON P.N. 25240KA051 AS SHOWN IN THE ILLUSTRATION BELOW."
