SUPPORT- 3686113 - Caterpillar

Table 1
Engine Model    Part Number    
3412E     250-6878 Auxiliary Sea Water Pump Gp
156-6892 Impeller Kit
156-6893 Impeller Kit
156-6894 Water Pump Kit
212-7266 Pump Kit    
C30, C32     250-6877 Auxiliary Sea Water Pump Gp
156-6892 Impeller Kit
156-6893 Impeller Kit
235-4830 Housing Kit
235-4831 Housing Kit    Installation
Be sure to take the following guidelines into consideration during cooling system installation.
The associated plumbing for the auxiliary water system should be at least as large as the opening for the water pump inlet.Note: Larger plumbing will be required for installations that have longer runs and/or for systems that will have a large number of bends or elbows.
The water pump inlet pressure (auxiliary pump) that is created by the auxiliary water circuit should not be less than 24 kPa (3.5 psi) vacuum.
A vent valve should be placed between the water pump suction strainer and the check valve.
The strainer should not impose more than a 9 kPa (1.5 psi) restriction to the flow of cooling water.
The pump and as much of the plumbing as possible should be below the water line of the vessel.Reference: For more information on the installation of auxiliary water systems, refer to "LEKM7145, Marine Engines Application and Installation Guide – Cooling Systems".