Usage:
3304 (02B, 04B, 10E),
3306B (64Z) Industrial;
3304B (1NS, 1PS, 13E),
3306B (1RS, 84Z) Marine;
3304B (9HK, 83Z),
3306B (8JJ, 9NR, 85Z) Generator Set Engines
Description of Change: The governor control cover assembly used on these engines includes a new governor shaft seal and an improved governor control cover. The new seal is more resistant to heat damage than the former seal. The improved governor control cover provides governor shaft support. This helps reduce side loading of the seal which can result in seal damage.
Adaptable To: The part number of the 7N-8780 Governor Control Cover Assembly (with the improved governor control cover and new 138-9507 Seal) has not changed. The improved governor control cover is not serviced separately and is only available as the 7N-8780 Governor Control Cover Assembly. The new 138-9507 Seal is a direct replacement for the former 5P-3272 or 8T-2604 Seals. The new seal is adaptable to all earlier governor control cover assemblies.
The 7N-8780 Governor Control Cover Assembly (with the improved governor control cover and new 138-9507 Seal) is effective with 3304 and 3306 commercial engines as listed in the chart.
