Massey Ferguson 1100 hydraulic difficulties

[mf690t]

Hi everyone,
After mouths I still have not found solution. Sorry for the vid駮 in french, I bring new info, I did some tests :
With a pressure-gauges and a flowmeter, I Find good flow from charge pumps (from 7 to 22 gal/min following the engine speed), but by putting the flow coming out of the flowmeter directly to the crankcase. The opening pressure of the "pressure regulating valve" (soupape r馮ulatrice de pression de charge) is good, about 87 psi.
However, the outflow from the H.P pump does not exceed 9.5 gal/min...
After the tractor start, I push the manual valve located in front of the seat, and the engine speed decline until the pressure goes up to 87 psi, but it's normal.
After that, I start again the motor but by opening a distributor with a hose to create an open circuit. before the pressure rises to 87 psi, everything works pretty much normally. When the pressure reach to 87 psi, any flow suddenly !
Why when this pressure is reached, I have no more flow despite the need ?
I disassembled the charge pumps and pressure regulating valve, everything is OK.
Don't worry PatrickS2222, is not the real first re-start We run engine many minutes to raise the temp駻ature.
Thanks.

 

[mf690t]

Hi everyone,
I'm sorry for the "rise" of the topic, but I found a solution recently for my 1100, and I think that it can be useful to other people who have the same problem.
reminder : I lost all hydraulic after 10 seconds of run, 2 months ago I've bought a used radial pump and... it works !
It's logic but I was not sure about broken pump.... tests, tests, but It's more simple to change this parts.
Thank you everyone I will give news of the tractor.
A+