Hello,
This is my first post so I hope it makes sense !!
I have a 2003 4CX that I bought new & has 7300 hours.
I have had an on-going & worstening brake problem with it over the last 200 hours or so.
It started with, one day having no brakes- i.e. the pedals went straight to the floor- the reservoir was empty.
I have owned this machine from new & we have maintained it ourselves so there has not been a problem with incorrected fluid being used in the braking system- always JCB light 15 oil.
We bled the two sides (although I didn't know about holding one pedal halfway done whist bleeding the other side) & all seemed fine- the brakes worked again.
However, this problem re-occured with increaseing frequency- to start with I had to fill the reservoir every day & after a couple of weeks the contents of the reservoir dissapeared in 3/4 minutes!
There is no external leak so the only thing for me was the internal brake piston seals.
We replaced these & bled the two sides (without the opposite pedal half way down method) & the brakes seemed fine.
but, after road testing it the same problem occoured- on the right side.
When I pressed hard on the R/H pedal I felt the fluid escape & the pedal go all the way to the floor.
When removing the reservoir cap the R/H side was completely empty & gurguling as if sucking the fluid down.
We re-bled the system twice but now the fluid dissapears in a few short minutes.
mht1 156 seems to have had a similar problem although provoked by adding brake fluid.
jcb jeff gave a very comprehensive reply- maybe you aor anyone else has an answer?
Thanks
This is my first post so I hope it makes sense !!
I have a 2003 4CX that I bought new & has 7300 hours.
I have had an on-going & worstening brake problem with it over the last 200 hours or so.
It started with, one day having no brakes- i.e. the pedals went straight to the floor- the reservoir was empty.
I have owned this machine from new & we have maintained it ourselves so there has not been a problem with incorrected fluid being used in the braking system- always JCB light 15 oil.
We bled the two sides (although I didn't know about holding one pedal halfway done whist bleeding the other side) & all seemed fine- the brakes worked again.
However, this problem re-occured with increaseing frequency- to start with I had to fill the reservoir every day & after a couple of weeks the contents of the reservoir dissapeared in 3/4 minutes!
There is no external leak so the only thing for me was the internal brake piston seals.
We replaced these & bled the two sides (without the opposite pedal half way down method) & the brakes seemed fine.
but, after road testing it the same problem occoured- on the right side.
When I pressed hard on the R/H pedal I felt the fluid escape & the pedal go all the way to the floor.
When removing the reservoir cap the R/H side was completely empty & gurguling as if sucking the fluid down.
We re-bled the system twice but now the fluid dissapears in a few short minutes.
mht1 156 seems to have had a similar problem although provoked by adding brake fluid.
jcb jeff gave a very comprehensive reply- maybe you aor anyone else has an answer?
Thanks
