please can somebody help me, i have a jcb 3cx and there is a hydraulic leak on the back hoe where the arm pivots on the main pin, it looks like it is coming from what i think is a release valve which also is a plastic part and im not sure if this is the correct piece, the jcb is F registration

laura owen, May 2011

F regs 3cx Serial number 337000 onwards ?
Do you mean the kingpost breather at the top of the slew box below the boom ram cylinder end pivot pin , if so the slew ram seals are leaking the oil internaly and filling the slew gearbox oil level should be around 100 mm from the top.

fix a jcb, June 2011