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Hitachi Seiki Draw Tube/Actuator problem

randyt88rsb

Plastic
Joined
Jun 26, 2018
I have a hitachi seiki hicell 23, recently discovered it was leaking coolant back into hydraulic tank I rebuilt the unit with new seals but now my chuck/draw tube hardly has any travel...what do I have wrong here? Any ideas? I threaded the draw tube back into the unit like it was before...atleast I thought I did lol.
 
It sounds like the two anti rotate pins on the piston are not in the holes, which is limiting the stroke of the piston. You need to pull it back apart and align the piston.

You probably already did this but change that coolant contaminated hydraulic oil. :)
 








 
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