The dipper arm on any excavator takes a lot of punishment,
Even with good lubrication an regular servicing something has to wear-out.
on this Kobelco SR35 the time has come to have the bosses machined out and replaced with new ones.
After removing the dipper arm from the excavator, the arm was secured to the mill bed.
Some rough cuts to make way for the new bosses.
Final machine cut to size.
Machining the opposite end.
Turning the new boss that will be pressed into the dipper arm.
This approach was adopted because the boss and bushes were so badly worn that simply replacing the bushes would have made no improvement.
Boss turned and ready to be pressed into the dipper arm.
New bush that runs inside the boss.
All pressed together and in the bottom you can see the new bush.
Dipper arm like new.
Only one way - the right way.
