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Champion 780A series V vhp questions?

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My buddy just picked a Champion 780A VHP SERIES 5 with 7000 hours and have some questions.
1) If it stalls in gear it won't re-start until you jump it!Is this normal or due to the electronics and it senses it's in gear? I was surprised at the tiny batteries it has ( 31-MHD not 4 or 8 d as I would expect)

2) Slow hydraulics. All of my grader experiances is on Cats (14g,h, and m,160 h and m,and 140 h) and not sure if this is a Champion thing or the hydraulics are not set right? If you hit the float from fully raised they are faster the if you manually lower them and all functions seem sluggish.

3) don't have a manual so what is the set pressure on hydraulics?

4) Every once in a while, it won't go into reverse and you have to cycle back and forth from neutral to reverse. Is this an electrical/ computer problem? Bad joystick/ paddle?

Thanks in advance!

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