1010 air leak

[Bret4207]

My 1010 crawler/loader/backhoe is sucking air. I found the o ring in the tank that goes on the standpipe by the filter was hard and leaking. I made a new one out 1/8" material and it seemed to solve the issue, until I got on a slight slope and then I get the air leak again. I can't tell if it's coming from the tank or elsewhere. I've tightened all the lines I can and the clamps on the suction lines. I'm concerned at this point that I either have a collapsed hose that joins some of the steel lines or I'm missing something obvious, like the o-ring I made out of 1/8" material is wrong.

Any ideas gratefully appreciated.

[Lavoy]

I might be misunderstanding, but I assume you are meaning on a fuel line? If there is fuel above the line, it can't be an air leak.
Lavoy

[Bret4207]

Sorry, I have a suction leak on my hydraulics. Bad enough that the pump is chattering whenever the loader or hoe is in operation.

[Lavoy]

That can be a tough one to find.
Lavoy

[gus]

If it only happens on a slope, I would check the tank suction line. Over fill the tank to see if it changes anything.

[Bret4207]

Thanks Gus. I'm in the process of changing out the suction pipe hose unions now. The tank should be dry judging by the amount of oil I got all over me, so I'll pull the filter and check the standpipe. Already found a loose suction fitting but tightening made no difference. My fear is it's a crack in weld somewhere, that would be a needle in a haystack thing to find.

[gus]

Might try pressure in the suction line. It would force oil out of the leaky spot if it is in the line. Eliminate one thing at a time.

[Bret4207]

I'm pretty sure the leak is at the pump. Anyone ever tear into one of these?

[gus]

Have you replaced the filter? Not quite the same but a plugged filter caused my vacuum pump to cavitate when transferring wine and caused it to pull in air.

[Bret4207]

Filter has maybe 2 hours run time on it. It's worth a shot though. Thanks!

[Bret4207]

Is there an aftermarket filter for this or am I stuck going back to mother Deere? I found a reference here to a Fram CH6484 filter being a cross referenced option but no one seems to have followed up and verified that. ???

[Bret4207]

Gus, changed the filter. The old one only had a few hours run time on it, but so far it looks like you were right! No air leak so far. Haven't had a chance to work it, but it's better than it was for sure. Thanks!