I decided to have a quite day working in my shop. Turned the computer off and turned my old record player on. I stacked a stack of old but good music records on it and worked the day away listening to some good tunes.
I am still waiting on the gear I need for my JD 4320 transmission. So I decided to tackle the main hydraulic pump today. Actually four of them. LOL I had a whole box pallet full of pump parts. So I started out by cleaning up everything. I them took them all apart. I sorted the best parts out for the one I need for the 4320. I overhauled it completely. I ran it on my home made test stand and it checked out fine.
I made this test setup twenty years ago. I took an electric motor with a belt drive system on it that will turn the hydraulic pump at 1500 rpm or 2400 rpm by just changing a belt from one pulley to another. I have a hydraulic tank that holds twenty gallons of HY-guard oil. The tank is above the pump so it acts just like the front reservoir does on the tractors. To test the flow and pressure I just use my flow-rator test equipment. This test setup has saved me the labor of installing a pump to only find out it does not work right or leaks.
The pump I needed for the 4320 went so well I decided to go ahead and make another one out of the parts for a spare or I will sell it as a rebuilt pump. That one worked fine after I had to play with the stroke control valve some. It needed lapped in. It was wanting to stick in the bore some times. I match fitted it and it works fine now.
I then went inside for a late lunch and a short nap. When I came back out I remembered another box of pump parts. So I went and dug them all out.
Long story short. I ended up rebuilding four of the pumps. I then threw out all of the bad parts. I oiled down the good parts and put them in Zip lock bags. That way they are ready to go when ever I need them. I also labeled them and inventoried them in my spare parts shelves by the correct JD part number.
Luckily my hording let me have all the parts I needed to get them working. When good JD Dealer friend was forced out by JD here a few years ago he sold me a bunch of new parts at dealer cost. So I had all the bearing and over haul kits on hand.
The extra three pumps will fit other tractors I have or I will have customers with a bad pump that need to get going right now. So I have some to exchange with them.
A very good day. I enjoyed just working by myself without any distractions. It is amazing what you can get done that way.
Well guys have a good week.
I am still waiting on the gear I need for my JD 4320 transmission. So I decided to tackle the main hydraulic pump today. Actually four of them. LOL I had a whole box pallet full of pump parts. So I started out by cleaning up everything. I them took them all apart. I sorted the best parts out for the one I need for the 4320. I overhauled it completely. I ran it on my home made test stand and it checked out fine.
I made this test setup twenty years ago. I took an electric motor with a belt drive system on it that will turn the hydraulic pump at 1500 rpm or 2400 rpm by just changing a belt from one pulley to another. I have a hydraulic tank that holds twenty gallons of HY-guard oil. The tank is above the pump so it acts just like the front reservoir does on the tractors. To test the flow and pressure I just use my flow-rator test equipment. This test setup has saved me the labor of installing a pump to only find out it does not work right or leaks.
The pump I needed for the 4320 went so well I decided to go ahead and make another one out of the parts for a spare or I will sell it as a rebuilt pump. That one worked fine after I had to play with the stroke control valve some. It needed lapped in. It was wanting to stick in the bore some times. I match fitted it and it works fine now.
I then went inside for a late lunch and a short nap. When I came back out I remembered another box of pump parts. So I went and dug them all out.
Long story short. I ended up rebuilding four of the pumps. I then threw out all of the bad parts. I oiled down the good parts and put them in Zip lock bags. That way they are ready to go when ever I need them. I also labeled them and inventoried them in my spare parts shelves by the correct JD part number.
Luckily my hording let me have all the parts I needed to get them working. When good JD Dealer friend was forced out by JD here a few years ago he sold me a bunch of new parts at dealer cost. So I had all the bearing and over haul kits on hand.
The extra three pumps will fit other tractors I have or I will have customers with a bad pump that need to get going right now. So I have some to exchange with them.
A very good day. I enjoyed just working by myself without any distractions. It is amazing what you can get done that way.
Well guys have a good week.
