Hitachi fiat FH150LC mark1 or 2 machine. was OK, new oil and return filter 30 hours ago
suddenly now has developed a worrying problem
when digging under load for example or even when arm in air and operate 2 rams to full extension and once at extenion, pump is making a bang noise and hose is shaking each time does this
See video below to show the problem (just copt and paste into your browswer)
https://www.youtube.com/watch?v=S0mekaApSDA&spfreload=10
operator with boom in air, jus moved dipper and bucket ram to full extension and then this happens.
once the problem starts, if we move the tracks, 1 track will not move after this noise.
if we move for example the Power / economy switch (for quick throttle change) then the tracks are then ok again
any advice or where to start
undo bleed screw on pump and oil flowing out so maybe not trapped air
any ideas
suddenly now has developed a worrying problem
when digging under load for example or even when arm in air and operate 2 rams to full extension and once at extenion, pump is making a bang noise and hose is shaking each time does this
See video below to show the problem (just copt and paste into your browswer)
https://www.youtube.com/watch?v=S0mekaApSDA&spfreload=10
operator with boom in air, jus moved dipper and bucket ram to full extension and then this happens.
once the problem starts, if we move the tracks, 1 track will not move after this noise.
if we move for example the Power / economy switch (for quick throttle change) then the tracks are then ok again
any advice or where to start
undo bleed screw on pump and oil flowing out so maybe not trapped air
any ideas