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John Deere Tractors Discussion Forum
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4010 hyd pump removal

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gwece

07-14-2004 20:13:31




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OK guys, someone out there please tell me the trick to getting the main hyd pump out from under a 4010 diesel with a wide front end. I have got the front end removed and everything loose, even removed the coupler. But for the life of me, can't figure out how to get the pump to back up enough to clear the housing to get it out. I have very little play frontwards, about a half inch or so before it starts hitting the steering ines. Am I going to have to remove the fuel tank, radiator, etc and take this thing out from the top?

Thanks!

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Dan

07-15-2004 07:33:20




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 Re: 4010 hyd pump removal in reply to gwece, 07-14-2004 20:13:31  
When I worked in a JD shop some years back when these tractors were much newer, we had a dummy plug like one of the piston plugs I believe with cable on it so you could lower the pump out after getting it loose using an overhead hoist. Just removed one of the plugs and put the dummy one in it.



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CMB

07-14-2004 20:39:48




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 Re: 4010 hyd pump removal in reply to gwece, 07-14-2004 20:13:31  
Thankfully, it's been a long time since I've had to do this, but as I remember it ,you take the pump & mounting bracket out as a unit, after disconnecting everything else. If I remember correctly there are two short dowels between the block & pump bracket to provide alignment between the pump & crankshaft. I think you only have to move the pump & bracket assy about 1/4 inch ahead to clear the dowels.

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gwece

07-15-2004 05:48:44




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 Re: Re: 4010 hyd pump removal in reply to CMB, 07-14-2004 20:39:48  
Thanks CMB, We thought about trying that, but the shop manual didn't say anything about it....but the shop manual has left us hanging before! I just didn't see anyway of getting the pump out by itself. We will try removing the two as a unit this morning. Thanks again for the reply.



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Rodney A. Johnson

07-15-2004 11:19:21




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 Re: Re: Re: 4010 hyd pump removal in reply to gwece, 07-15-2004 05:48:44  
Which "shop manual" are you referring to. I took out and rebuilt a hydraulic pump on the 3010 using the JD service manual (3000 series) and it mentioned that the bracket and pump had to come out as one.



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gwece

07-15-2004 21:36:49




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 Re: Re: Re: Re: 4010 hyd pump removal in reply to Rodney A. Johnson, 07-15-2004 11:19:21  
Shop manual was for a 4010 which made no mention of removing the pump with the bracket attached. It just said move it forward until it cleared the coupler and drop down. We got it out fine by removing it with the bracket...no way it was coming out otherwise. Just hope rebuilding the pump takes care of my slow hydraulics problem (have already replaced the trans pump and the pressure control valve). JD tech put the gauges on and said I had the proper pressure but slow flow from the main pump, which he admitted was unusual.

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Rodney A. Johnson

07-16-2004 06:52:06




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 Re: Re: Re: Re: Re: 4010 hyd pump removal in reply to gwece, 07-15-2004 21:36:49  
Be sure to keep your hands covered in hydraulic oil while working on the pump. This will prevent acid from your hands from getting on the parts.

Also, when setting the end play of the shaft, do not put in all the pistons and what not. My 3000 series service manual reassembly procedure has you do it, while the 4000 series service manual (have a 4020 as well) says to not put in the pistons.

I had the end play checked and set by an JD technician (didn't have a dial indicator at the time) and he mentioned that it would have been better had I not put all the pistons in.

Otherwise, it was a fairly simple rebuild...and a lot less $$$s then buying a rebuild. Good luck.

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