Hydraulic hose size
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=142734
Printed Date: 03 May 2025 at 11:49pm
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Topic: Hydraulic hose size
Posted By: rustyorange45
Subject: Hydraulic hose size
Date Posted: 22 Sep 2017 at 8:55pm
What is the proper size hydraulic hose to run the remote ram on an Allis Chalmers implement, 3/8" or 1/2"? Single acting cylinder ran off of a WD45. All the ports on the Allis cylinders I have are 3/8" NPT. What size were the original hoses? Thanks, Tim
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1953 WD45 WF/Model 90 Loader, Oxnard Rear Blade, 80R Mower, Model 209 Disc, WD Rear Mounted Scoop, Model 184 & 160 Rotary Mowers, 1952 CA NF/L306CA mower, 1953 CA WF/Model 8 Loader.
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Replies:
Posted By: MACK
Date Posted: 22 Sep 2017 at 9:28pm
Posted By: joe
Date Posted: 23 Sep 2017 at 2:56pm
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I don't know what kind of flow those tractors had, though I would imagine it's 5~ GPM. 3/8" hose is more than big enough for even for 8GPM. 1/2" hose is way overkill. 1/2 hose is good for about 15 GPM while keeping the velocity at under 20 FPS. A lot of new equipment today comes with 1 wire hose from the OEM, and that's used with tractors that make better than 3000 PSI. A WD45 doesn't make near that, so 1 wire would work. That said you can hardly but 1 wire. Most dealers have 2 wire hose, and that's more than enough.
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Posted By: KJCHRIS
Date Posted: 23 Sep 2017 at 5:00pm
3/8" hose with a operating PSI rating of at least 4000 PSI. When the hydraulic ram hits full extension the pressure will spike to 3500 - 3700 PSI "IF" set correctly.
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AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,
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Posted By: MACK
Date Posted: 23 Sep 2017 at 8:29pm
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I would not use any thing but 4 braded hose. Pump is supposta to be 3600 psi and I have saw some spike out above 4500 psi. A busted hose at 3600 psi can do damage to the body. Be safe. MACK
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Posted By: Joe(TX)
Date Posted: 24 Sep 2017 at 12:09pm
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A 2 wire 3/8 100R2 or 100R16 hose is rated for 4785 psi and is more than adequate. Even a 1/2 2 wire will handle the pressure. When I make hoses I use R16 because it is more flexible than the R2. The 4 wire 3/8 hose is rated for only 4000 psi and cost about 3 times as much as well as being stiffer. The rating take into account any pressure spikes.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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Posted By: AC7060IL
Date Posted: 24 Sep 2017 at 12:44pm
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High hydraulic pressure reminds me of back in the 1970s, a community farmer put his thumb over a hydraulic cylinder's hose that had a pinhole leak. He thought by doing so would keep oil from spraying a mess. It's pressure injected his thumb & quickly filled it to 3-4 times in size. Luckily he didn't loose thumb, but it took months of draining & antibiotics to heal. Always maintain good hydraulic components.
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