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AC HD4 Hydraulic pump identify
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johnP View Drop Down
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Joined: 17 May 2015
Location: Canada
Points: 29 		Post Options Post Options   Thanks (0) Thanks(0)   Quote johnP Quote  Post ReplyReply Direct Link To This Post Topic: AC HD4 Hydraulic pump identify
    Posted: 22 Jul 2017 at 9:13am
Could anybody please help identify Pump on my HD4 it is leaking a little and causing it to chatter when using the hydraulics. I would like to reseal it if the parts are still available. This is what it looks like. It is leaking between the cast and aluminum sections.
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DMiller View Drop Down
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33756 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2017 at 3:48pm
That is most likely a previous patch repair. Do not usually or casually mix aluminum and steel housings as they expand at different rates. I would look for a whole pump to get rebuilt.
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Josh H View Drop Down
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Joined: 24 Feb 2015
Location: Carnesville, GA
Points: 128 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Josh H Quote  Post ReplyReply Direct Link To This Post Posted: 06 Aug 2017 at 12:04am
You probably already know but thats two separate pumps that go together. If i remember right one towards operator is shuttle and other is hydraulic. If i understand right, you're saying its the gasket between the two. Separate fairly easy, splined shaft
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johnP View Drop Down
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Joined: 17 May 2015
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Points: 29 		Post Options Post Options   Thanks (0) Thanks(0)   Quote johnP Quote  Post ReplyReply Direct Link To This Post Posted: 07 Aug 2017 at 11:39am
Ya I thought the same thing because rear pump flows through the filter up front, I'm just wondering if its a o-ring and still available. I dont use the machine to make money or anything its just for around the yard and I run a splitter for firewood so I really don't want to replace the either pumps.
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johnP View Drop Down
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Joined: 17 May 2015
Location: Canada
Points: 29 		Post Options Post Options   Thanks (0) Thanks(0)   Quote johnP Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2017 at 5:07pm
Thanks for all the replies, I removed both pumps and there is no orings. However the seal for the output shaft of the hydraulic pump was leaking causing the fluid to exit between the two pumps. seal is CR 545294  
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