I have an old JD 1020 diesel with a closed hydraulic system. It has a 37 loader on it and it had been hesitating while raising. The fluid is full. I use it to lift the tounge on my camper and move the camper. However, recently it wouldn’t raise and was having difficulty raising with nothing in it. The cylinders on it are one way cylinders. I had them rebuilt and they work great but it still won’t lift the tounge on the camper, it just squats the tractor. Doesn’t make any sounds just won’t lift it like it used to and it would lift it with ease before. Is there anywhere I can adjust the pressure?
38 Sears Roebuck
Well-known Member
- Location
- Lancaster County, PA
How about your filters?
Yeah, I’m gonna change but it doesn’t have 100 hours on it since I changed it last.
Roger in Iowa
Well-known Member
You rebuild one way cylinders if they are leaking. What would be the reason to rebuild to increase lifting. You need to be looking at pressure problems!
jdeere562
Member
- Location
- Loess Hills, Iowa
Why would the tractor squat, if the cylinders are not applying upward pressure? That part makes no sense to me.
Steve in VA
Well-known Member
- Location
- Natural Bridge Virginia
You changed the filter but what about the screen? My 1020 gasses had similar issues and the screen was crud.
Screen was good too but that was a couple years ago. I’m going to drain the fluid and see what it looks like now. Thanks.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Roger in Iowa
Well-known Member
No the cylinders are not bypassing fluid! If they were you would have leaks from the rod end of the cylinders.
Your control valve is leaking back to the reservoir allowing the bucket to lower!
Jim.ME
Well-known Member
- Location
- Central Maine
The OEM one way cylinders on a JD 37 loader are displacement cylinders. As oil is forced into the barrel the rod is pushed out lifting the arms. There is no piston with packing on the rod of that type of cylinder. It can't bypass internally. There either has to be an external leak (hose, fitting, or gland packing) showing or the control valve is worn and not holding.
Slow raising maybe the screen. Not holding is likely in the valve unless there is visible oil running out of it.
Steve in VA
Well-known Member
- Location
- Natural Bridge Virginia
Keep us up on follow up
Roger in Iowa
Well-known Member
Squat is not a measureable force.
Hydraulic pressure is. Sounds like hydraulic pressure is not as high as it was previously.
Yes, the guy told me there was no piston in there to bypass but something about the seals and o-ring. All I know is before, they would drop right after I shut off the tractor. And now they hold firm. I cleaned the suction screen about 70 hours ago. I tried to attach a video but it was too big.
Thats what I thought. I haven’t touched anything else. Do you know the process for increasing the hydration pressure?
Jim.ME
Well-known Member
- Location
- Central Maine
Do you have a gauge to check the pressure as Tx Jim suggested? It is best to know what you have before thinking of adjusting. JMHO
I am wondering if the spool of your control valve is moving and centering properly.
I am wondering if the spool of your control valve is moving and centering properly.
Jim.ME
Well-known Member
- Location
- Central Maine
Is your loader operated by a separate loader valve?
The hoses come off the scab and return behind the driver’s seat.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2025 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy