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Mine only has 4 as well. I was told this is standard on these units. Apparently the motors are pretty pricey at around $500 / each.

I’ve been running it at less than 1/2 throttle so far. I...

Can’t seem to post a picture from my phone (no surprise there lol)

Thanks for the suggestions guys. It turns out the rad at the back is also the tank. It was 3/4 of a gal low so I topped it up with a Lucas hydraulic additive. The problem seems to be fixed now.
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That’s the problem. There is no sight glass, dipstick or tank anywhere. I’m thinking the only way to check it is via the rad at the back. Maybe the rad doubles as a tank?

As a matter of fact I just picked up a new filter actually.

I was going to completely change the hydraulic oil & filter and flush it but I can’t find any info anywhere on what weight hydraulic...

Howdy!

I recently bought this unit and I’m having a lot of trouble finding any info on it. Does anyone around here have any experience with these? The entire hydraulics system was rebuilt last...

Hey Bscout :)

I realize this thread is 2 years old, do you still have your 635? I just bought exactly the same unit and I can find very little info about it! I’d sure like to chat with someone...