Author Topic: Fuel Transfer Problems  (Read 214 times)

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Offline Hey Dave

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Fuel Transfer Problems
« on: January 31, 2018, 08:20:56 AM »
The fuel transfer pump on back of the HEUI pump was spec to pull fuel from 6 feet and max distance for this is 17 feet. The Cat HEUI pump needs a fuel pressure of 81 psi at 2300 rpms. With motor homes having fuel tank located under the front axle or just in back of front axle with. Approximate  distance of 35 to 40 feet this little fuel pump with gear width of .250 or 1/4 inch will not provide pressure being called for by the engine.
There is also air entering fuel system from fittings with O-rings held in place into brass fitting with plastic retainer clip. This problem has been around for a very long time. So caterpillar build a electric fuel pump / water separator filter to provide a constant fuel flow and maintain constant fuel pressure of 81 psi.

Ask Dave has put together a parts list and instructions to install on your engine and from several motor home owners, there add on instruction (results have been very positive for upgrade to electric pump.)

Closing if thinking in this area of up grade stay with Caterpillar OEM pump and parts, Several low cost fuel pumps have tried but will hold up for the long haul.
« Last Edit: January 31, 2018, 07:04:52 PM by Ken Carpenter »
Dave Atherton, Retired Caterpillar Mechanic