Perplexed - Page 3

EricR · #21 06-18-2014, 09:43 PM

Ok Jon, I put a gauge on the hydro tonight and the best I can get pressure wise is 100 psi. We have not dug into the valves but at this point would it make a difference if we did or not? Thanks for the help so far guys.

J-Mech · #22 06-18-2014, 10:49 PM

Yuk. 100 PSI is way off. Hey, do you think the rear has been changed? I only ask because of this thread. Might be worth the time to make sure it has both valves. Otherwise, pull the relief valves. Not the big ones mind you, the little ones. Check that thread out I linked to. I put pics up in it. I'm lazy and don't want to post them again.

EricR · #23 06-18-2014, 11:23 PM

Jon as far as I can tell this rear has not been changed and it has both of the needed valves so if dad doesn't pull them tomorrow I will do it after work, thanks.

J-Mech · #24 06-18-2014, 11:52 PM

Quote:

Originally Posted by EricR

Jon as far as I can tell this rear has not been changed and it has both of the needed valves so if dad doesn't pull them tomorrow I will do it after work, thanks.

Cool. The one on top is the one you need to pull. Since it drives fine, the one on the side shouldn't be bad/issue. I have a feeling that it may be the charge pump. Here's for hoping for you!!

Oak · #25 06-19-2014, 09:11 AM

If it's a splined pump from a super it will (should) have both valves, but who knows what the PO did.

Could your charge pump cover be on 180* wrong? Here is how it should look. I'm not sure it could be put on wrong but maybe.
DSCN0865.jpg

Are you guys 100% sure all the power steering lines are on correct?

PaulS · #26 06-19-2014, 10:20 AM

Ok here goes nothing. Oak our pump is splined and does appear to be mounted the same way as the one in your pic. The stamped name is on top and possibly a part # can be seen on the bottom.

Jonathan I very carefully and with a little trepidation removed the top relief valve. I removed the hex headed top which has an O ring at the top of the threads under the hex head. This part has a hollow core and appears to be good without any scratches or undue worn spots. Next came about an inch long spring also appearing to be in good shape albeit a really stiff puppy. The last piece to come out is the cup which is squared on the top and a tubelike appearance with a cone shape on the bottom. it too seems to be in good shape. I did not see any shims as described in the description though. My thoughts are leaning toward the pump or the unlikely tube attached to the wrong place. I am going to try to get my camera working and take some pics but at the moment the camera had dead batteries.

J-Mech · #27 06-19-2014, 04:00 PM

Quote:

Originally Posted by Oak

If it's a splined pump from a super it will (should) have both valves, but who knows what the PO did.

Could your charge pump cover be on 180* wrong? Here is how it should look. I'm not sure it could be put on wrong but maybe.
Attachment 52967

Are you guys 100% sure all the power steering lines are on correct?

You can rotate the pump 180°. And I too still wonder about the lines being crossed. Todd, maybe you can post a pic of the line routing? I don't have a super to take pics of.

Quote:

Originally Posted by PaulS

Ok here goes nothing. Oak our pump is splined and does appear to be mounted the same way as the one in your pic. The stamped name is on top and possibly a part # can be seen on the bottom.

Jonathan I very carefully and with a little trepidation removed the top relief valve. I removed the hex headed top which has an O ring at the top of the threads under the hex head. This part has a hollow core and appears to be good without any scratches or undue worn spots. Next came about an inch long spring also appearing to be in good shape albeit a really stiff puppy. The last piece to come out is the cup which is squared on the top and a tubelike appearance with a cone shape on the bottom. it too seems to be in good shape. I did not see any shims as described in the description though. My thoughts are leaning toward the pump or the unlikely tube attached to the wrong place. I am going to try to get my camera working and take some pics but at the moment the camera had dead batteries.

Sounds like all is well in the valve. And if there are no shims, then you can't remove any and see if it helps..... so.... I am going to lean toward the charge pump also. Eric says it is only make 100PSI. I only have one question: Is that 100 PSI just idling? WOT? And at any point in the test did you try to "max out" the pump? In other words, hold one of the hydraulic levers (until all movement stopped and it started whining) during the test? Might try that and see what the pressure does. I'm with OAK. Make absolutely sure that there are no crossed lines before proceeding. If you sure they are right, pull the charge pump and lets have a look.

PaulS · #28 06-19-2014, 04:49 PM

We first tested at what I would call a high idle and the guage needle did not move. We were testing using the forward, toward the front, hole that had a plug in it. I saw on another forum that Roland used the rear hole more toward the middle of the top. When we raised the engine speed to at or near full throttle we got the approx 100 psi reading but it seemed to bleed off some. I say approx because our guage reads to 4000 lbs and the diff between the 100 lb marks isn't very much. We did not try a load test but could do that tonight as it is still set up to test but with the top implement relief valve removed. The guy that made up the guage for Eric said he has tested thousands of hydros and always used the plugged hole to do it. I am also thinking it is in the pump but we are going to trace out the lines again tonight. Many thanks for your help. Would the pump from most other hydros fit this hydro. We looked at the hydro in our 149 and it appears to be identical.

Oak · #29 06-19-2014, 05:07 PM

Paul, no, only a super pump will work. The output shaft is different on the SGT's. I don't think this will help but it only takes a minute. When I rebuilt my steering box I had no steering at all. I ran it for 5 minutes and had nothing thinking I put it together wrong. I loosened the hose going to the steering ram and moved the wheel back and forth a few times and it started working. Give that a try maybe you'll get lucky.

J-Mech · #30 06-19-2014, 05:38 PM

Todd, I think Paul was referring to the charge pump.

If so, yes. All charge pumps are the same.