International 685 XL hydraulics - not got any

[X344chap]

Right

This started off as a quick job to bleed the brakes as the pedals were almost at the floor to stop the tractor.
Checked the hydraulic oil level and topped it up
Tried to bleed brakes - but was using the car technique of opening bleed valve, pushing pedal to floor, shutting bleed valve. This was effective before but did nothing this time. Pedal now goes to the floor with no effort at all.

Decided that it could be oil restriction as hydraulic filter hasn't been replaced in a while.

Replaced the hydraulic filter and now i have no hydraulics at all, no lift arms, no steering and still no brakes.

Finally read the manual to find out i was bleeding the brakes wrong - but mystified as to why there is no hydraulics. Some sort of air lock at the pump?

Any thoughts on this please?

Thanks

 

[spark plug]

I have known this in the past, one thing that sometimes works is putting the tractor into gear, sounds stupid but I’ve known it to work. Other than that I keep operating all the controls for the hydraulics, PTO etc and the hydraulics will usually come back.

I’m sure there’s a more technical method but this is what’s worked for me.

 

[Flat 10]

First there is separate reservoir for clutch fluid I think behind the dash and second the hydraulics often don’t work after a filter change and there’s a method in the book of getting them to go (un airlocked if you like) read the manual more closely!!!!!!

 

[SuperTwo]

Crack open a pipe on the steering ram to bleed the hydraulics

 

[X344chap]

First there is separate reservoir for clutch fluid I think behind the dash and second the hydraulics often don’t work after a filter change and there’s a method in the book of getting them to go (un airlocked if you like) read the manual more closely!!!!!!

Thanks - the clutch is the only thing that's working at the moment ! Will re-read the manual - but i cant recall seeing anything about bleeding hydraulics - theres a big section on bleeding the brakes.

 

[X344chap]

Crack open a pipe on the steering ram to bleed the hydraulics

Will give this a shot thanks.

 

[Gapples]

To bleed the hydraulics after filter change ( they normally self bleed ok ) slacken the p/steering feed pipe, this pipe is directly below the hydraulic filter.
IF that doesn't work take out the flow divider, that's under the big bung on the bottom of the MCV, the MCV is the big cast block the filter bolts onto.

 

[X344chap]

To bleed the hydraulics after filter change ( they normally self bleed ok ) slacken the p/steering feed pipe, this pipe is directly below the hydraulic filter.
IF that doesn't work take out the flow divider, that's under the big bung on the bottom of the MCV, the MCV is the big cast block the filter bolts onto.

Will give this a try and report back - once that's sorted then on to the original job which was the brakes !

 

[X344chap]

Just a quick update - moving the tractor back and forward and working the pto selector cured the problem - and going through the proper brake bleed procedure - clamping off the reservoir return - and doing the half pedal down, 5 pumps of the other pedal alternate bleed valve thing sorted out the brakes.

Theres still a long travel on the brake pedals - could that be a sign of wear on the oil immersed brake discs? Do they wear out?