Usage:
All 3208 Marine Engines Equipped With 3N7801 And 3N7802 Instrument Panel Groups
Description of Change: A steel fitting is now used in the above instrument panel groups for Caterpillar Marine Engines. The steel fitting is used as an adapter for the transmission oil pressure sending unit. The steel fitting is stronger than the former fitting.
Formerly, an iron fitting was used. It was possible for vibration to cause failure of the fitting.
Adaptable As: The new 8L6005 Fitting is a direct replacement for the 6B7639 Tee in these applications. The 6B7639 Tee is still available for use in other applications.
If desired, the 8L6005 Fitting and the transmission oil pressure sending unit can be installed on the oil cooler outlet for easier access. The oil pressure indication will be a little less because of a small pressure loss in the oil cooler.
When more than one fitting and sending unit are to be installed, it is Caterpillar's recommendation that the fittings and sending units be installed vertically instead of horizontally. See the Illustration. This will keep the amount of stress on the components at a minimum.
Vertical installation of two sending units at oil cooler outlet.