DEF fluid in heavy equipment !!

[sparkycuda]

Mario, you are so right about the old iron. Before 1996, off-road diesel fuel filters were 40 micron, then changed to 15 and when Tier 2 engines came out in late '90s, then went to 2 micron. We had more problems with filters clogging from fuel gotten from worksite tanks than any problems the engines had. Old hydraulic systems could eat a bunch of dirt and not be a problem. But as pressures went above 5000 psi and piston pumps became the norm, we saw all kinds of failures due to contamination. Yes, the new systems are more efficient and easier to operate, BUT they are horribly expensive and will not tolerate a bit of gunk in them. Guess that will keep the service departments busy for a long time!

Ken