Slow hydraulics - 3415

Posted by Klaus on July 24, 2001 at 12:15:56 from (206.229.91.132):

So I've got my 3415 back together and the forward gears work again. It's actually useful now, but I'm finding the hydraulics very slow.

Loader:
It takes about 10 seconds to raise the front loader all the way. The owner's manual says it should take 5 seconds. Even 5 seconds sounds kind of slow - are these just just slow machines?
As I understand from the parts manual, I've got a 17GPM main pump and a 9GPM steering pump. Does all of the steering pump's flow add to the main flow when not steering? I don't have a service manual.

Power steering:
The power steering works, but not really below 1000 engine RPM. There's a screw with T-handle in the front of the steering flow divider valve - does it force all steering pump flow to the steering system when screwed in? out? Or does it force the flow away from the steering system?

I've changed the hy-tran fluid and suction and return filters. I found the bypass valve had slipped off the old suction filter. The wrong filter (not as tall) was in there, and the valve had been spaced out with a piece of PVC pipe. Also the fluid was milky white from water contamination.

Should I be looking for a stuck relief valve? stuck flow divider? Seems like the front loader has plenty of power (pressure). The backhoe is off currently, and the steering pump diverter valve that sends all steering flow to the backhoe is set to steering mode, I'm pretty sure that's not the problem.

Sorry for the long post,
Klaus

Follow Ups:

• Re: Slow hydraulics - 3415 THatOtherGuy 13:09:34 07/24/01 (0)

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