Explaining the Cat C7 7.2 engine fuel diagram and pressure testing 

A simple outline of diagnostics of a cat c7 engine fuel system. I have use m2 106 with a Caterpillar c7 for my logistic company and wanted to share some basic information relating to the fuel system.
freightliner
CAT SECONDARY filter PN# 1R-0751 2 micron ------- $22.85
Fleet Guard PN# 19624 7 mircon --------- $23.00
Walmart
CAT 7 pressure regulator PN# 3696662 ------- $46.99
fuel coupler for my friend sunpro pressure regulator. We screwed in one of his quick connect brass fitting into my coupler to use it on the PD222 coupler-port. I did not review the specs but the 242 coupler might also work.
ph.parker.com/...
Parker Hannifin PD222 Series PD Steel Test Port and Diagnostic Equipment Quick Coupler with Female Pipe Thread, 1/8" Body Size, 1/8"-27 NPTF Thread Size, 1.67" Length
AMZON $37.00
DAVCO 233 part list if you ever want a fuel break down of these parts. The check valve is a serviceable part.
www.davco.com/...