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Allis Chalmers 175 hydrolic pump
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elec View Drop Down
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Joined: 23 Nov 2020
Location: mi
Points: 86 		Post Options Post Options   Thanks (0) Thanks(0)   Quote elec Quote  Post ReplyReply Direct Link To This Post Topic: Allis Chalmers 175 hydrolic pump
    Posted: 06 Sep 2021 at 6:42pm
My 175 has a pump on the side, I've seen others that have the pump on the motor instead. Anybody know what year they switched? I'm looking at buying another 175 and it has the pump on the motor.
Thanks
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21399 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2021 at 7:05pm
Front pump began at s/n 175-2035 in late 1973.
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
Points: 3482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 08 Sep 2021 at 8:56pm
Cost reduction.... changed pump eliminated bevel gear hollow shaft, along with power steering change=  $250 per tractor we were told savings plus less assy time.  
When told "it's not the money,it's the principle", remember, it's always the money..
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Joined: 12 Sep 2009
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Points: 8495 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep 2021 at 8:46am
$250 was real money back then
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Joined: 28 Mar 2015
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Points: 1011 		Post Options Post Options   Thanks (0) Thanks(0)   Quote allisbred Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep 2021 at 11:39am
Did the front axle change at the same time as the pump or prior?
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DrAllis View Drop Down
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Points: 21399 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep 2021 at 12:20pm
The change made the front support (under the radiator) a hollow box weldment, instead of a casting with steering gears inside. It then housed the hydraulic pump mounted inside of it. The wide front axle design changed and a narrow front axle/single front wheel were no longer available. The GPM's of the hydraulic pump were reduced about 10% or so because of direct drive/engine speed, where the old system was a speed up drive.
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