I own a 7 year old East Coast 6-ton mini-splitter. (http://
http://www.eastcoastminisplitter.com.../online-store/
scstore/p-001.html?L+scstore+mrrw8658ffa8aca8+1273412911)

The unit worked as advertised, be that slow but effective. Today I
managed to break the return spring for the pump handle. Can these be
replaced? Without that foot lever returning to the up position pumping
becomes a matter of frustration

Also curious if anyone has modified one of these to be electro-hydraulic
or pneumatic-hydraulic?

A final alternative might be to replace the existing bottle jack with a
faster action and higher ton capacity unit. Might anyone here have tried
that already?

Jim wrote:
I own a 7 year old East Coast 6-ton mini-splitter. (http://
http://www.eastcoastminisplitter.com.../online-store/
scstore/p-001.html?L+scstore+mrrw8658ffa8aca8+1273412911)

The unit worked as advertised, be that slow but effective. Today I
managed to break the return spring for the pump handle. Can these be
replaced? Without that foot lever returning to the up position pumping
becomes a matter of frustration

Also curious if anyone has modified one of these to be electro-hydraulic
or pneumatic-hydraulic?

A final alternative might be to replace the existing bottle jack with a
faster action and higher ton capacity unit. Might anyone here have tried
that already?

Faster action and higher ton capacity are sort of opposites. When one
goes up, the other goes down. Unless you get a two stage hydraulic
jack, like on the car jack I recently bought. With no load the jack
goes up fast. With no load it takes two strokes to go all the way up.
In normal use it takes less than one stroke until it hits the frame,
then it changes to the slower but stronger stage. If it were one stage
going up fast, when it hits the log you would need to gain a couple
hundred pounds to push the lever for it to split.