John Deere 2030 Hydraulic pressure loss

eldo may

New User
My 1971 2030 John Deere, suddenly lost all hydraulic pressure. No PTO, No lift, No Steering. Has HI-LO shift not working. Changed transmission filter an that did not alter anything. What is most likely the problem, the Hyd Pump? How should I check this out?
 

Check clean trans hyd sump screen(parts key 30) It's possible trans pump gear broke.
mvphoto11259.gif
 
Yes I cleaned the screen when I changed the
filter. Only a little bit of fibrous material in it.

I noticed a line running along the right side of
the tractor, the lower of three lines. Not the
large line, seemed to have some fresh oil on it,
and the bracket that holds them together had
gotten a little loose and had rubbed quite a bit
and it feels like the line may be cracked where I
cannot get to it yet. Not much fluid there, but
just a little. Not sure what line this is yet. Is
there a suction line from the lower reservoir?
Just wondering if it sucks or is pumped to the
main pump.
 
(quoted from post at 21:19:48 09/21/14) Check out our hydraulic pump coupler... the spline could have stripped. Been there.

Good luck.

I agree on frt coupling except eldo may stated "no pto or hyd hi-lo" which would indicate lose of trans pump flow. It's highly possible one of the the previously mentioned hyd components supply lines or seals has failed.
mvphoto11266.gif
 
(quoted from post at 18:25:46 09/21/14) My 1971 2030 John Deere, suddenly lost all hydraulic pressure. No PTO, No lift, No Steering. Has HI-LO shift not working. Changed transmission filter an that did not alter anything. What is most likely the problem, the Hyd Pump? How should I check this out?

Front pump won't move high pressure oil unless the transmission oil system can supply 2-4gpm to the front pump, cooler and reservoir tank.
Stuck valves, broken transmission pipe work, failed pump, failed clutch or pto brake seals.
TimS has a fix to prevent the Dubuqes from diverting too much oil to lubrication functions.
 
Not sure what you mean by "TimS has a fix to
prevent the Dubuqes from diverting too much oil
to lubrication functions.".
 

TimS is the resident guru that repairs equipment that was beyond the understanding and ability of all bit a very select few engineers and mechanics.
 
The problem now is why did it just quit working...as said clutch...trans pump,tube broke, hilo seal rings or pto seal rings...the trans pump pumps thru pto and hilo before it goes to front pump...
 
The problem now is why did it just quit working...as said clutch...trans pump,tube broke, hilo seal rings or pto seal rings...the trans pump pumps thru pto and hilo before it goes to front pump...
 
(quoted from post at 16:26:47 09/22/14) The problem now is why did it just quit working...as said clutch...trans pump,tube broke, hilo seal rings or pto seal rings...the trans pump pumps thru pto and hilo before it goes to front pump...

It's possible if eldo may tractor is dual stage clutch type and pto isn't operating then neither will the trans pump be pumping oil.
 

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