Posted by NCWayne on November 24, 2008 at 19:33:21 from (24.172.56.198):
Over the past 6 months or so I've noticed what look to be dry rot cracks on the rubber fuel lines on several company machines as well as some customer machines. Some have been carrying diesel fuel and some carry gasoline. All of the lines were "good quality" Gates multipurpose fuel line that was supposed to be good for any type of fuel. There didn't appear to be any deterioration from the inside out to indicate a problem with the fuel type, all of the cracks tended to start on the outside and work in. I've noticed it on 1/4, 5/16, and 3/8 line so it doesn't appear to be something that's confined to just one size/batch. The only common thread between them all, besides being Gates brand, is that the lines were all installed between a year to maybe two years ago. Recently there has been one on the pressure side of the fuel pump on our shop forklift (gas), another on the suction side of the pump on my welder (gas), another on the pressure side for the aux engine on my service truck (diesel). There are several others I kinda remember on customers equipment awhile back but don't really remember the exact details of them.
I've seen old line that lasted nearly forever and eventually got hard, etc but this recent mess of seeing the lines seemingly dry rot in such a short time is new to me. Whatever the case I was just curious if anyone else had seen this happening on any of their equipment.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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