Case excavator CX130D hydraulic pilot lines

[DDL]

I recently had a hydraulic hose changed on a CX130D left leaver , the fitter installed a double braid high pressure hose instead of the correct pilot hose spec. I have noticed a jitter when dropping the boom while also using the left lever. Is there any chance that this could be the cause?

 

[V8Druid]

I recently had a hydraulic hose changed on a CX130D left leaver , the fitter installed a double braid high pressure hose instead of the correct pilot hose spec. I have noticed a jitter when dropping the boom while also using the left lever. Is there any chance that this could be the cause?

feed or return to the stick or a line to a service actuator?

 

[DDL]

feed or return to the stick or a line to a service actuator?

It’s neither , it’s one of the pilot lines from the left hand joystick to the main control valve. From the picture attached it is the line with the green that was replaced.

 

[CPS]

It’s neither , it’s one of the pilot lines from the left hand joystick to the main control valve. From the picture attached it is the line with the green that was replaced.

It's most likely air it the system? Has it been long since it done it?

Also, and ive done it before myself, 1/4 hoses can be crimped to tight, causing a restriction.
It's posable

 

[DDL]

It’s been a few months , would it be possible there is still air after this long? What’s the best way of bleeding it?

 

[V8Druid]

It’s neither , it’s one of the pilot lines from the left hand joystick to the main control valve. From the picture attached it is the line with the green that was replaced.

so " it's a line to a service actuator " on the main block .... can't see as a twin wire'd make much difference ... more likely Aiden's suggestions