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B front hydraulic pump size

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oldways View Drop Down
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Joined: 25 Apr 2013
Location: west Ky
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Post Options Post Options   Thanks (0) Thanks(0)   Quote oldways Quote  Post ReplyReply Direct Link To This Post Topic: B front hydraulic pump size
    Posted: 17 Jan 2023 at 11:22pm
I'm planning to add front mount pump for live hydraulic to my B. Can someone tell me what size gear pump to order ? I'm looking getting one from surplus center. Looking at GP series pumps. Need to know what displacement to get. Thanks .
1 Corinthians 1:18 1969-190xt-III. 1966 190xt gas. 1966 190xt Cab. 1948-G. 1937-WC unstyled. 1950-B. 1951-CA. 1966-D17-IV
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DiyDave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 5:06am
Go to their tech page.  Remember that a B has only about 20 hp. I'd say you want ine that draws no more than 10 HP, 1500 PSI, around 5-10 gpm... Just my humble opinion...Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AaronSEIA Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 5:50am
What do you want to do with the pump?  Thats going to determine what size you'd need.  I'd say 10 gpm and 2,000 psi would catch it.
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 6:00am
What diameter of cylinders do you intend to use?? Anything a model B could handle would only need less than a 2 inch diameter cylinder, so 4 to 5 GPM would be plenty.
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oldways View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote oldways Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 8:51am
1.5 -2. Bore. Lift grader blade and belly mower. Currently use stock pump aftermarket cylinder. 3 point conversion. Works ok just not live and when grading driveway it's terribly aggravating and borderline dangerous. Have to stop in highway get blade up , tractor back in gear. Etc. Usual downfalls of not having live hydraulic.
1 Corinthians 1:18 1969-190xt-III. 1966 190xt gas. 1966 190xt Cab. 1948-G. 1937-WC unstyled. 1950-B. 1951-CA. 1966-D17-IV
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 9:00am
Well, an old D-17 is only 4.5 GPM, so a "B" can't hardly be more than 2 GPM's.
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 9:01am
rear pump is measured in QUARTS per minute.. Very small... Think of a 5 gallon bucket. If you pump that much in a minute, that would be PLENTY !.

for SIZE... lets say you want 2 gallons per minute... there are 230 cubic inches in a gallon , so you want about 500 cubic inches pumped per minute....  Your motor is running at 1500 rpm, so you need about .33 cubic inches displacement per revolution of the pump...

Look for pump sizes in the .31 to .36 displacement ( approx).

just make sure you get the right rotation... click on the pump and look at the rotation, speed and pressure rating... most of those pumps can put out 5 gpm at 3600 rpm... your running less than half that speed....... too big of pump and your "raise" speed will be too fast.


Edited by steve(ill) - 18 Jan 2023 at 9:20am
Like them all, but love the "B"s.
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Les Kerf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 12:46pm
An electric /hydraulic snowplow pump would be more than adequate for this task and much easier to hook up.
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 3:20pm
I agree Les. So many of these tractors have been converted to 12 Volts with an alternator anyway.
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oldways View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote oldways Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2023 at 8:04pm
Thanks for the help guys!
1 Corinthians 1:18 1969-190xt-III. 1966 190xt gas. 1966 190xt Cab. 1948-G. 1937-WC unstyled. 1950-B. 1951-CA. 1966-D17-IV
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