GLOW PLUG GP 3454499 - Caterpillar

Idle and Low Idle can be checked in-chassis. Low Idle may be adjusted in-chassis. High Idle should only be adjusted on a bench.Note: The adjustment screw for High Idle is sealed at the factory in order to prevent tampering. High Idle will vary on different machines due to parasitic loads or due to slight differences in the control spring of the governor. The Full Load Set Point is critical. Attempting to adjust High Idle in-chassis may result in values that are out of the specification for the Full Load Set Point RPM, which is not acceptable. On some engines, the adjustment screws for High Idle and Full Load Set Point are sealed at the factory in order to prevent tampering. When you remove the seals, be careful not to damage the adjustment screw. A service kit is available to reseal the governors.