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Hydro Gear Pump problems after servicing

17111 Views 17 Replies 6 Participants Last post by  bigstumpyd
I have a Hydro Gear BDP-10L-117P on a Lesco walk behind mower. It was leaking fluid at the trunnion seal so I decided I would replace the seal. I got a seal kit and took it apart and replaced all the seals in the pump. Put it all back together and now the wheel will not turn. I tried to bleed the system many times by opening the release valve and moving the controls back and forth. When I look in the fluid tank the fluid going back in looks foamy and has bubbles. So I assume air is getting into the system somewhere. Where exactly can air get in? There is one suction hose going to the pump in between the two hoses going to the motor. How do I check to find where air is getting in? Any advise would be great cause i dont want to spent $500 on a new pump.
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Yes, a huge difference. The hsg is actually eccentric. Also, did the put the charge pump relief spring and ball in the correct place and in the correct orientation? The ball goes in the pump, and the spring goes in the hsg. The correct gasket or o-ring for the cover is critical also. If you didn't pre-fill the pump, you could have created a dry start situation, possible internal damage and it will take forever to bleed (if at all)
The damage could occur if the pump was empty. Best way to tell is open the filter up. Otherwise ,take a sample of the oil. Your looking for silver or gold color particles. If it drives OK, I would leave it alone.
Yeah, I'm the one who posted that little trick a couple of weeks ago.
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