FORD 4000 HYDRAULIC PROBLEM

Allen L · Oct 9, 2015

It is Friday and I just got my Ford 4000 back from having a new clutch installed. It went to the shop with working PTO AND 3 pt lift, but now neither work and of course the shop is closed. I checked the level fluid and it was to the mark. I sure would appreciate any response as to what may happened or something I am missing. I tried all the draft and hydraulic levers but it seems no flow. Thank you in advance for your assist. Allen

Scott PA · Oct 9, 2015

If it is a 1965-1975 4000 with a 3 cylinder engine and 8 speed transmission they may have installed a clutch pressure plate for a tractor without independent pto or the splines went bad in the input shaft of the trans. would be my 1st guess.

Allen L · Oct 10, 2015

Thank you very much for the response! I think my tractor is a 1975. Sounds like the tractor will have to be split again and since the Hydraulics were fine before replacing the clutch your first guess sounds like the issue. My manual shows a Drive line disengagement lever which I cannot locate on my tractor. Could that be a possibility?

Sean in PA · Oct 10, 2015

Drive line disengagement lever is only on the tractors with the Select-O-Speed transmission.

ZANE · Oct 10, 2015

As to the hydraulics, They may have failed to bleed the hydraulic pump

Remove the plug from the head of the pump. Start the tractor and run at idle till air bubbles are not coming out with the oil.

Reinstall the plug and try it now.

Zane

Allen L · Oct 11, 2015

Could you tell me where the plug is or maybe a better question is where is the hydraulic pump? I only have the operators manual and not sure if it has that procedure printed. Thank you Zane and all!

Sean in PA · Oct 11, 2015

Are you sure that it is a 1975 4000? Does it have a 3 cylinder engine or a 4 cylinder engine?

If it a 1975 4000 (3 cylinder engine) and it does not have a Select-O-Speed transmission then the hydraulic pump is the gear type inside the right side of the rear axle center housing and it does not have a priming/bleeding plug.

If it is a 3 cylinder 4000 and it does have the Select-O-Speed transmission then the hydraulic pump is mounted to the left side of the engine by the flywheel, and the plug would be on the body of the pump facing outward from the tractor and down at around a 45 degree angle and it would have a recessed hex had (allen screw type).

If it has a 4 cylinder engine, then it was made before 1965, and the hydraulic pump is mounted to the right side of the engine by the flywheel, and the plug would be on the body of the pump facing outward and upward at about a 45 degree angle and have either a square head or a recessed hex head.

Allen L · Oct 11, 2015

After reading your inputs on the 4000 Ford, I have deducted that it is a 3cyl with 8 speed gearbox. ON my right side drivers seat is the draft
control. auxillary hydraulic valve, and the PTO lever is on the left side. Sounds like this being the case there is no primer/bleeding plug. What
can I do now? All Hydraulics and the PTO was working when it went to the shop for the new clutch. I do appreciate your time. Allen

Allen L · Oct 12, 2015

The repair shop that put the new clutch and pressure plate said they put the right replacement in the tractor. Now are looking at the hydraulic pump. My question now is what would the hydraulic pump have to do with the PTO which does not turn either. I am concerned with Sean PA who first felt it was either the wrong clutch (for a non independent PTO or the spines on the shaft). Would a bad pump stop the PTO shaft from turning also?

Sean in PA · Oct 12, 2015

On a 3 cylinder 4000 with a manual transmission and independent PTO, the the gear type hydraulic pump that runs the 3 point lift actually has a second smaller pump in the rear of the pump body that is used to drive the hydraulically controlled PTO clutch pack. So if there's something wrong such that the main pump drive gear isn't spinning, the gears in the PTO pump won't be spinning either. In the exploded parts diagram below the gears labelled 3 & 4 are the main pump gears that provide the flow for the 3 point lift, and the gears labelled 16 & 17 are the ones that provide the flow for the PTO control circuit.

Allen L · Oct 13, 2015

Sean you are a jewel, that helps me so much and makes sense. I guess since the hydraulics stopped after the clutch was replaced I won't to put
the problem at the clutch. Maybe the wrong clutch. Would a clogged filter on the pump shut it down? I will hear soon I am sure from the repair
shop. I will keep your diagram for the future and I think I may try to get a repair manual. Thanks again, Allen

Sean in PA · Oct 14, 2015

With the independent PTO the transmission input shaft is hollow with an inner and outer shaft, one is for the transmission and should be controlled by the clutch and the other is for the PTO and it should be powered all of the time, and the PTO input shaft also provides power to the hydraulic pump, so if the only thing that was worked on was the clutch then they had to have either used incorrect parts or put things together incorrectly for both stages of the hydraulic pump to not be working afterwards. That's not to say that something else might not have coincidentally gone bad at the same time that the clutch work was done, but my first suspicion would be with the work that was done.

Allen L · Oct 14, 2015

I am no rocket scientist but a former machinist and I agree with you. I think He is pretty honest so we shall see. I paid $986.00 for the work so
human nature will no doubt have him try to say it is not the clutch. He did say the replacement was just like the old clutch but time will tell.
I will post later and let you know what happens. Thanks again.

FORD 4000 HYDRAULIC PROBLEM

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