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3rd June 2019, 03:00 PM #1Most Valued Member
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Hercus hacksaw hydraulic lifter - oil and other questions
Hey all,
I posted over on the Hercus area a week ago with no luck - so, posting here.
I am getting an old hacksaw back on its feet and am trying to figure the hydraulic lifter. With 140 weight (gear/differential) oil - the lifter manages to move the vertical piston about 1mm or so. I tried ISO 68 - nothing, ISO 90 - nothing. At least with 140 I see something. Though, 1mm is not even enough to cater for the wear to cause an actual lift!
I figure it should be more than 1mm movement?
The pistons seems pretty snug, but I am guessing there will be some wear - the rest of the machine has a fair bit of wear.
And while I am at it, where should the the hydraulic actuating eccentric be positioned relative to the stroke? I am guessing it cuts on the forward stroke, and just near the end of the forward stroke it should starts its lift?
many thanks,
Greg.
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