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AJ 
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 Topic: PSI Rating on Hydraulic Hose for H3
Posted: 04 Mar 2019 at 8:42am |
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What PSI rating hydraulic hose should you run on an H3? Can't find the info anywhere on it.
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NomoreJohnDeere
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Posted: 04 Mar 2019 at 9:38am |
regular old hydraulic hose gets my vote
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HD3
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AJ
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Posted: 04 Mar 2019 at 10:13am |
But there are different PSI ratings. Hydraulic hoses are not cheap and if I'm gonna spend the money and go through the effort I want it to be right to avoid problems/blow outs as I've had a couple hoses blow in my face before on other equipment.
 NomoreJohnDeere wrote:
regular old hydraulic hose gets my vote
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Edited by AJ - 04 Mar 2019 at 10:19am
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NomoreJohnDeere
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Posted: 04 Mar 2019 at 10:32am |
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get a high rated one
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HD3
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Acdiesel
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Posted: 04 Mar 2019 at 10:56am |
if your using it for a loader/blade cylinder 3000 to 4000 psi hose. is fine. anything on the a drive pump to a motor 5000 psi hose.
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AJ
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Posted: 04 Mar 2019 at 11:21am |
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I have the pump on the side of the torque tube. Hose to that should be 5000psi?
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steve(ill)
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Posted: 04 Mar 2019 at 1:09pm |
In the 1970s we use to use a LOT of 3000 psi hoses on the dozers coming out of the Allis Plant.. That is the RATED pressure, so its good for all day long. The BURST pressure is probably double that.
I think most of the tractors at that time were running 2100- 2500 psi operating pressure.
Edited by steve(ill) - 04 Mar 2019 at 1:10pm
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Like them all, but love the "B"s.
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AJ
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Posted: 04 Mar 2019 at 4:44pm |
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Good to know thanks for the info
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Jim.ME
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Posted: 04 Mar 2019 at 5:35pm |
H3 is a gear pump isn't it? If so it is likely pressure is in the 2000-2200 psi range. A 2 wire braid SAE 100R2 hose would be typical for that application range. The place you are going to get your hoses from should be able to supply that info for their hose and fittings, working psi is marked on a lot of hoses. Like pipe, the bigger the diameter the lower the working pressure. Burst pressure is 4 times working pressure by the SAE standard. If you want to go first class go with the 4 wire spiral wrapped hose (called CAT hose by some). That is the type usually found on "piston" type pump systems and newer high pressure systems. Also hardware store pipe fittings don't belong on the pressure side of a hydraulic system and best if not in the suction either. Most are only 150 psi rated. SAE_hose_types.pdfsae_hoses.pdf
Edited by Jim.ME - 04 Mar 2019 at 5:37pm
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Coke-in-MN
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Posted: 05 Mar 2019 at 7:46pm |
2 wire brade - 2500 max pressure
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AJ
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Posted: 06 Mar 2019 at 9:04pm |
Found this, I know it a little blurry. Maybe someone has an actual brosure for the crawlers. Am I reading that right that it only has 1500psi hydraulic system? 
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Jim.ME
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Posted: 06 Mar 2019 at 9:24pm |
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That looks right for a gear pump of that vintage. 1000, 1250, 1500 were common system pressures in the day for equipment with gear type pumps. You will be fine with two wire braid hydraulic hose.
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DMiller
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Posted: 07 Mar 2019 at 5:36am |
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On my 7G I opted for what was more common and even as heavier feel more comfortable with heavier hose as takes abrasion or bumps and snags longer, better.
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