7745 NO HYDRAULICS PROBLEM

J

juney68

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juney68

• Mar 7, 2014

• #1

I have a 7745 that the hydraulics stopped working on. I have always used the 80/90wt oil in it and had no problems even in cold weather. Nite before last I checked it and was a little low so I added a gallon. Next morning(20 deg F) and now no hydraulics at all. This is very thick oil for this temp but like I said before, it has never been a problem. It almost seems as if the pump is not running. Any chance the heavy oil broke something? Any other advice greatly appreciated. Thanks

 

Renze

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1978 5718 35kmh: Work in progress
1967 3011

• Mar 7, 2014

• #2

did your oil look milky ? then its frozen. had that once.

 

J

juney68

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juney68

• Mar 8, 2014

• #3

No, its not milky.

 

D

dave_peters

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Dave P

• Mar 8, 2014

• #4

First things first, Have you checked that you haven't put the pump out of gear ? There are 2 controls, the left lever on the floor which should be forward and the rotating lever in the centre floor under the seat which should be pointing to the left parallel to the bulkhead.Hand clutch must be down.

 

J

juney68

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juney68

• Mar 8, 2014

• #5

Yes, I did check those. Even tried putting it in 1000rpm side, but still nothing. Normally, you can hear it whining(probably the relief valve, but not sure) but now I can only hear it a little bit when I raise the lever for the 3pt arms.

 

J

juney68

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juney68

• Feb 26, 2015

• #6

Sorry for the late update but this was the screen in the sump was plugged with gunk. Thanks for the help.

 

S

scratchthebear

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ScratchTheBear

• Feb 28, 2015

• #7

We have got a similiar problem with a 7245 which has been sat for a few years.

The hydraulic output to implements is not working at all although the arms will lift.

We have removed the paper filter at the front of the cab and cleaned the small mesh filter under the pump accessible from the outside.

Is this likely to be the filter on the pump plate as well?

 

S

scratchthebear

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ScratchTheBear

• Feb 28, 2015

• #8

Didnt realise that these dont have the small internal filter like the 3511/3545...

However we discovered part of the control linkage disconnected and sitting on the top of the pump when we removed the pump plate...

Oh dear means the top has got to come off which I am not looking forward to given the weather at the moment