I'm needing to be pointed in the right direction on this old girl. I briefly documented my history with her in someone else's thread HERE:
https://www.heavyequipmentforums.co...king-at-a-Case-530-Backhoe-and-need-some-help
Still not getting full pressure in any of the hoe cylinders. 3000 PSI gauge inserted in the loader valve port shows ~ 2000PSI when loader functions are used, anywhere from 900-~1400PSI on hoe functions depending on which one is activated.
Loader runs strong and plenty fast, lifts a full bucket without any problems.
All 7 hoe cylinders have just been rebuilt [ALL were in really bad shape with some packings torn and even missing-amazing that cylinders would move at all], the power beyond O-ring has been replaced, the O-rings and plunger have been replaced on the pressure relief valve on the loader control valve.
Just replaced the 5/8" hoses to the boom cylinder as mechanic friend thought there could be an internal restriction [they were looking really ragged outside]. Made no appreciable difference.
The curl seems to be the strongest cylinder. The boom will not lift a full bucket of dirt. While all cylinders now cycle thru their full ranges of motion, they all are down on power. Book specs say the hoe should have ~ 8900# breakout force and I'm pretty sure a bucket of dirt doesn't weigh even 1000#
Probably spent 10 hours or so reading here and on another forum, replacing the power beyond port O-ring gained about 200 PSI but still not enough. Cleaned the screen in the loader pressure relief valve as some posters mentioned that-didn't find any crud in it.
Hydraulic filter just replaced with WIX 1517, gauge runs in the green now,was red before. Pretty much all the fluid has been replaced in the course of repacking the cylinders. I do plan on replacing it all with Case fluid when it goes on sale in November unless you guys think it would be a waste of more $$$.
Even after rebuilding all cylinders they all leak down somewhat within 1-2 minutes and there are drips from the hoe valve body. Does this mean worn/missing O-rings in all the spools?
Is there such a thing as a complete valve body rebuild kit for these old hoes? Aftermarket would be great as Case seems WAAAY too proud of their parts. They quoted me $22- for an O-ring backup strip in the loader valve that should cost about $0.50 and over $30 for a spring in the same item [the old parts look fine but since I was in there I thought I'd replace them-NOT AT THOSE PRICES]
I'm thinking my next step is to pull each pressure relief valve in the hoe valve body and look for crud/missing O-rings. I gather from other threads that Case OEM O-rings are the way to go-what say you guys?
I hate to mess with detaching the hoe and removing/rebuilding the valve body right now since winter is approaching here in Montana and really would like to defer that until next year if there's another quicker, simpler place to look. It doesn't absolutely have to run at peak power but sure would like to be able to lift a few half-ton rocks before they freeze to the ground for five months.
Anybody got some firsthand knowledge they care to share with an old guy with an old hoe? Thanks in advance-
https://www.heavyequipmentforums.co...king-at-a-Case-530-Backhoe-and-need-some-help
Still not getting full pressure in any of the hoe cylinders. 3000 PSI gauge inserted in the loader valve port shows ~ 2000PSI when loader functions are used, anywhere from 900-~1400PSI on hoe functions depending on which one is activated.
Loader runs strong and plenty fast, lifts a full bucket without any problems.
All 7 hoe cylinders have just been rebuilt [ALL were in really bad shape with some packings torn and even missing-amazing that cylinders would move at all], the power beyond O-ring has been replaced, the O-rings and plunger have been replaced on the pressure relief valve on the loader control valve.
Just replaced the 5/8" hoses to the boom cylinder as mechanic friend thought there could be an internal restriction [they were looking really ragged outside]. Made no appreciable difference.
The curl seems to be the strongest cylinder. The boom will not lift a full bucket of dirt. While all cylinders now cycle thru their full ranges of motion, they all are down on power. Book specs say the hoe should have ~ 8900# breakout force and I'm pretty sure a bucket of dirt doesn't weigh even 1000#
Probably spent 10 hours or so reading here and on another forum, replacing the power beyond port O-ring gained about 200 PSI but still not enough. Cleaned the screen in the loader pressure relief valve as some posters mentioned that-didn't find any crud in it.
Hydraulic filter just replaced with WIX 1517, gauge runs in the green now,was red before. Pretty much all the fluid has been replaced in the course of repacking the cylinders. I do plan on replacing it all with Case fluid when it goes on sale in November unless you guys think it would be a waste of more $$$.
Even after rebuilding all cylinders they all leak down somewhat within 1-2 minutes and there are drips from the hoe valve body. Does this mean worn/missing O-rings in all the spools?
Is there such a thing as a complete valve body rebuild kit for these old hoes? Aftermarket would be great as Case seems WAAAY too proud of their parts. They quoted me $22- for an O-ring backup strip in the loader valve that should cost about $0.50 and over $30 for a spring in the same item [the old parts look fine but since I was in there I thought I'd replace them-NOT AT THOSE PRICES]
I'm thinking my next step is to pull each pressure relief valve in the hoe valve body and look for crud/missing O-rings. I gather from other threads that Case OEM O-rings are the way to go-what say you guys?
I hate to mess with detaching the hoe and removing/rebuilding the valve body right now since winter is approaching here in Montana and really would like to defer that until next year if there's another quicker, simpler place to look. It doesn't absolutely have to run at peak power but sure would like to be able to lift a few half-ton rocks before they freeze to the ground for five months.
Anybody got some firsthand knowledge they care to share with an old guy with an old hoe? Thanks in advance-