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Old 06-28-2016, 12:10 PM   #19
O C Diver
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
Quote:
Originally Posted by Pgitug View Post
I have a gauge between my Racor 75900 pair. It has a drag needle that has never gotten to the red.
You may want to talk to a Cummins dealer regarding the safe limit as the gauge warning has no relationship to the vacuum pump limits. For my "C" series Cummins my dealer said the Cummins lift pump had a significantly lower vacuum tolerance before the pump would fail. Don't remember the number, but once I see the needle move on a full tank of fuel, it's time to change the cartridge. It's changed annually regardless. Compared to fuel, the cartridge costs nothing (<$10). The "B" series is more vacuum tolerant, but it would be wise to know Cummin's limit.

Ted
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