JD 45 loader, just repacked, getting progressively worse

pmarkel

Member
I posted here maybe a month ago about problems I was having with a 45 loader that I mounted on a JD 60 that I bought recently. I had been noticing a lot of hissing noise and the loader leaked terribly out of the front of the cylinders. I finishing installing the repack kits from JD today and also replaced the orings on the ends of the oil suction tube from powrtrol to pump.


I put oil back in the tractor (maybe 1.5 gallons) and fired her up. The loader lifted to about waist height without a lot of noise so I figured that was a good starting point. I got off and put another half gallon or so in and she lifted it another foot on the next try. That was the high point. After putting a little more oil in the pump starting making that vibrating hissing noise each time I actuated the lever and the loader lifted lower and lower on each subsequent actuation until dumbfounded I gave up.


The loader is hooked up with four oil lines, the front two closest to the nose of the tractor being tee'd into the top side port of the powrtrol and the back two lift lines being tee'd into the bottom side port. Scratching my head here--the loader has all new lines but I did pinch one of the lift lines pretty good when I drove into the brackets. I though it might be damaged but since it held oil I figured it must be okay. Could I have a poor pump, air in the lines, damaged couplers/hoses, or powrtrol issues? Thanks,


Pete
 
Sounds like you need more oil the rod side takes oil every
time you let it down and is empty since you had them apart,
cycle up and down and add oil until it stays full in the back
 
Pete,

I have worked most of the summer trying to get my 50 with 45W loader working after rebuilding the cylinders, finally gave up and moved on to
something else. Know the cylinders are ok as I did the two on another loader at the same time and they work fine. Will try to help out if I can. Are you
opening the level check cock on the right side when you add more oil. If not you may have added too much oil (if that is possible). I have heard guys say
they way over fill them without any problems.
 
Those cylinders take quite a bit of oil. Here's some rough math to get an idea of the oil volume. The cylinder bore is 3" and I think the stroke is around 25." The area of that is 3x3.14x25 which is 235.5 cubic inches for one cylinder. Convert that to quarts and that's about 4 qts to fully extend ONE cylinder. However I would guess you're only going to use 1 qt to fully extend each cylinder AFTER everything is primed because you have oil lines going to the front of the cylinders. Hope this makes sense
 
(quoted from post at 06:19:06 01/23/19) Takes awhile to get the air worked out and enough oil in.
pretty sure I have found the problem. I took the transmission fill plug out for the heck of it and out came a bunch of frothy oil. Now having changed the trans oil a month ago I don't think it picked up that much condensation. Seems like a blown rockshaft cylinder gasket to me. Just finished doing the rockshaft on one 60 so I guess I will have to move to the next.
 
Pete, by the time you get everything fixed around there you will be the expert and we will all be coming to you for advice :)
 
(quoted from post at 11:45:34 01/23/19) Pete, by the time you get everything fixed around there you will be the expert and we will all be coming to you for advice :)
JH, thanks but I don't think I will ever have "everything" fixed. That seems to be a moving target when your tractors are 60 years old. I'll settle for limping through one summer at a time...
 

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