Just blew a hose

   / Just blew a hose #21  
This happened to mine. The end pushed off the top of the lift cylinder next to the lift tilt control valve.
Writing on the old Power trac hose reads PARKER NO-SKIVE 421-3 WP 20,7 (3000 PSI) MSHA IC-40/10 SAE100R1AT-3 5 mm. I replaced it with a
PARKER NO-SKIVE 301-4 --- W.P. 5000 PSI ---MSHA IC-40/10 ---- ---- 4-2Q88. TYPE AT --- MIL-H-52471/5 ----- シ X 2W------- SAE 100R2
I know what some of these numbers mean but certainly not all of them.

Is those hoses made up hoses with ends that screw on? If they are { one part of the end screws up inside of the hose and the other part screws up on the outside of the hose with the threads in opposing directions] then it might be possible to cut off a little of the hose and remake the end and still use the hose. Well at least if you had any slack on the hose you could do that but pt usually don't use anything any longer than what is absolutely necessary, so maybe you couldn't.
 
   / Just blew a hose #22  
old thread revival, but for a reason.

In my time in the Navy, one of the standards that we drummed into peoples head was the concept of a wire removal form. Any time you remove more than one wire in a junction box, you label the wire, the terminal it came from, and record both on the form. Important to ensure that you don't switch them around, and get them all reconnected when the maintenance is over. Gives you a checklist to go by.

So I am doing some brush hogging, and my tractor decides it is time for a hard right turn. Quick worry about the dreaded PT-422 steering bracket ripping out... but I was happy to see there was only a river of hydraulic fluid running under my feet. Not welding needed (this time).

Pull up the floorboard. Low and behold, it is the OTHER hydraulic hose on my steering cylinder. i blew the last one 5 posts up in 2010. Same failure mode; hose "degloved" from the fitting.

So when I start pulling the hose off, it is the back hose attached to the steering pump, and all the other hoses are in the way. So I start disconnecting (all identical looking 1/4" hoses). Pull of the first one, I am think "I really need to start a wire removal form". But the first one had a wire tie-wrapped to it. I knew I would remember where that one went. Pulled off the second one, figured I would shove it far over to the right so I know where it goes. Still can't get my wrench on there. Pulled off the third hose. Pushed it back where I knew I would remember the right orientation. Pulled off the fourth hose, figured I would pull it to the left, and remember where it goes.

Yes, this story probably won't end well.

SO I took off the last (broken) hose, and snaked it out through the steering console. And in the process, jostled the hoses a bit. Now I was a bit confused. I knew where the tie wrap hose went (of course), and maybe the hose on the left. Maybe.

So half an hour later, back with my new hose from Napa, and scratching my head. I connected it the way I thought it should go. Started her up. The Steering did not appreciate this arrangement at all, sort of jerked back and forth like it was possessed. Quick key off.

Out came the magic marker. Number the hoses, draw a diagram. I have three hoses that I will have to swap (at worst). That would be what, 6 possible arrangements? Now I am starting to sweat. And wondering If the hose that was broken was really the back left. Maybe it was the middle.

I could be out here all afternoon in the middle of my pasture... and it is starting to look like rain.

Fortunately, the first two swapped hoses made everything work.

Moral of the story... 30 seconds to grab my sharpie out of my toolbox (it has a place of honor), could have saved me a lot of potential pain.

I pulled out my PT422 manual... not a single hydraulic diagram in there? What? I was sure there was one.
 

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