John Deere hydraulic pump tips

What I was able to share, that I thought is important .

[@95Thagen]

Good video, the "Washer A and Washer B" or the Black "square packing" and the white "backup washer" are the primary sealing device. The external seal is basically a dirt seal. As you mentioned, anything that gets past washer a and washer b goes back to the transmission. If washer a and washer b get wore out they will leak and overcome the external dirt seal. The dirt seal is not made to hold the full pressure inside the pump. Something else to check is the drain line that goes back to the transmission sump can sometimes get plugged causing the dirt seal to fail as a small amount of leakage is expected past washer a and washer b. Also I noticed your dime valves showed quite a bit of wear, the ones sitting on the rear plate. Those are cheap and easy to replace. Like you said, many times the main bearings and races do not need to be replaced. Good work, keep it up. Also good english, easy to understand. God Bless

[@cgittoes]

I loved the video as I am about to tackle a leaky pump myself. I am curious how did you press off the bearings with that cam in the way?

[@scottbaucum5965]

Thanks for the education. The flat race around those pin bearings is not the same on both ends. One end is beveled and the other side is flat with a groove around the inside perimeter. I did not notice this in disassembly. Do you know which side is which? Is the beveled side on the shims or is the beveled side against the bearing?

[@louisshubert1401]

Was wondering what model machine it came off of. I have a slightly different hose location set up and am trying to figure out a different problem. But will be doing going through it the same as you are. Did your noise go away or get better when you used a hydraulic function?

[@grgacvarak]

ABOUT THAT SOUND ITS VERY HARD TO HEAR DIFFERENT BECAUSE YOUR NOISE INSIDE YOUR ROOM ..YOU HAVE SOMETHING LIKE FAN INSIDE ROOM...

[@arnaldoravicini7486]

ME GUSTARIA TENER IDEA EN DONDE COMPRAR LOS RECAMBIOS DE ESA BOMBA EN EEUU Y QUE PUEDAN MANDAR A ARGENTINA GRACIAS

[@Laurel-Crowned]

Great vid! What tractor is this out of? I just bought a 300b and can hear a bad bearing sound (growl) from the pump area. What kind of noise was yours making?

[@ontheroadagain4773]

How does the pressure limiting system keep the pistons off the cam? Does the pressure compensating (relief) valve feed oil pressure to the pump case?

[@MSCrappieSlayer]

Great video. Did the new bearings fix the noise issue?

[@edwardhale3667]

Need to replace that pump with I have the right same pump but I have no serial numbers to go with

[@pierrelombaard820]

Do not spin a bearing like that

[@user-gn7jn3zw9f]

KAZAKSTAN

[@user-gn7jn3zw9f]

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