Ford 4500 backhoe

jeff ellermeyer · Sep 13, 2008

I am looking for someone that I can ask a few questions about my (new) 1972 4500 backhoe. Also looking for a service manual for same tractor. I am experiencing hydraulic problems. Aluminum output tube leaks at flange on pump. Will try to remove tomorrow to see why. Can this aluminum tube be replaced with flex or hose? Other problems as well. Looking for a resource to bounce some questions off.
REgards Jeff

Anonymous-0 · Sep 14, 2008

I have a '69 4500. Probably most of the stuff is the same.

Jim

jeff ellermeyer · Sep 15, 2008

Thanks Jim.. I noticed that the leak was around the O ring where the flange connects to the pump. I will replace it today and hopefully fix the leak. What may I ask is the function of the push pull valve up at the loader controls? Is there a filter inside the hydraulic pump itself that must be cleaned. Or the steering pump? Just a couple of questions that come to mind so far.
Regards Jeff

Anonymous-0 · Sep 15, 2008

The push-pull valve is for "float" of the bucket or so I'm told. I don't have that option. The hydraulic filter is under that big disc and nut on top of the tank next to the filler hole. There is also a screen that should be cleaned under the tank when you remove the hose neck. On the underside of the tank (if you have the PS pump built "into" the engine) where it feeds the PS pump is a screen in the tank fitting which needs occasional cleaning. The long bolt that holds on the hydraulic filter cover has a pressure relief valve for the filter. Check that it has no debris in it like mine did or you'll be cleaning those screens every 50 hours.

Jim

steve n carol · Sep 16, 2008

jeff, you asked about the, " [color=green:e4dcca6a00]push pull valve up at the loader controls[/color:e4dcca6a00]".
this is suppose to cause the bucket to stay (somewhat) level when you raise or lower the loader. This may be what JF in CT was referring to.
On my 4500, float is acheived by pushing the loader (not the bucket) lever forward until it seats in the 'detent'
Some of these controls only have one lever that controls both loader and bucket, (like my CASE).

JT in CT... When you say, "[color=green:e4dcca6a00]The long bolt that holds on the hydraulic filter cover has a pressure relief valve for the filter[/color:e4dcca6a00]". are you saying that there is a valve in the bolt?

...sl

Anonymous-0 · Sep 17, 2008

Right near the top of the long bolt is a pin that holds a spring that holds a "disc" valve closed. When the filter gets restricted the suction overides the spring pressure and the fluid bypasses the filter. Mine got some debris in the valve when it was open so it never closed and most of the fluid continued to always bypass the new filter and clog the lower screen. Should be inspected on every filter change.

Jim

steve n carol · Sep 17, 2008

Thanks Jim, When I got mine, the filter, bolt, bolt, screen. and washer was gone. I think it's together correctly now...sl

Anonymous-0 · Sep 19, 2008

I bought a 1970 4500 a few years ago- got the op manual from Jensales. Info is ok, but the pix are mostly black, poor images. Would look somewhere else for original quality.

Ford 4500 backhoe

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