3RRL
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Huge Kama
Posts: 2,027 
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Post by 3RRL on Sept 11, 2008 12:24:02 GMT -5
I wanted to revive this thread to report that the first 50 to 75 hours I had perfect performance after the repair.
But I have had on and off, good and bad performance out of mine since then. Exactly like the old symptoms, not like the power steering failure from the leak. I have 560 hours on the Kama now. Every morning the steering works like a charm ... smooth and free and light to turn the wheel. Goes lock to lock forcefully (positively) and holds, even under a heavy bucketful.
As it gets hotter, it gets harder and harder to turn like you've lost the power steering altogether. Then at some point it's like it "gives way" and starts steering light again, like the power steering kicks back on. So I don't think it's the cylinder bypassing or it would be bad all the time. And it wouldn't feel like a clog passed through, know what I mean? I run AW68 fluid in mine too. Fluid level is good and suction strainer is clean. I think it's debris that gets caught in the steering valve or somewhere.
After the repair, it must have left some remaining debris like part of that grommet in there that the strainer is not catching. So now it is back to the same old thing. Works good when first started and then when it heats up it stops working good. Then on occasion, it feels like a clog passes and starts to work good again, and then not... Larry told me he put a 10 micron filter on his steering system return in addition to the suction strainer, and I may do that too. Might help with this recurring problem I seem to be having.
Any thoughts?
Rob-
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GuglioLS
Administrator
Jinma354 LE
Posts: 1,276
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Post by GuglioLS on Sept 11, 2008 14:41:44 GMT -5
Hi Rob,
Steering problems seem to be popular these days. Yea my power steering was behaving badly, as if I had zero power steering, you know, power steering by Armstrong? It started several months ago. Turning to the left was not too bad, but to the right, forget it. Mine was not intermittent. I replaced the steering valve (Steering machine as Jinma likes to call it) that made no difference. So I finally replaced the steering pump altogether and that fixed it right up.
My Jinma has about a 2 quart fluid reservoir and no suction strainer. In order to get the darn pump off I had to drain the radiator because the petcock was in the way of removing the pump. After draining the coolant and removing the petcock I was able to get the steering pump off. It was a real PITA. As you mentioned I did install a 10 Micron return filter, all I did was cut the rubber hose between the hard line and the tank and insert the filter between the two. Works like a charm now.
My gut feeling on yours is the "W" o-rings on the ends of the inside of your pump are flat, so your pump is not building up enough pressure. OR like you said there is crap circulating around in there.
Does your steering get real stiff when it does not work? or does the wheel spin freely but the wheels do not turn? Another thing to consider is the pressure relief valve built inside the pump may be bypassing due to a week or miss adjusted bypass spring or debris like you described.
I could take some pictures of my filter mod if you like.
Larry
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3RRL
Administrator
Huge Kama
Posts: 2,027
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Post by 3RRL on Sept 11, 2008 21:21:26 GMT -5
Hi Rob, Steering problems seem to be popular these days. Yea my power steering was behaving badly, as if I had zero power steering, you know, power steering by Armstrong? It started several months ago. Turning to the left was not too bad, but to the right, forget it. Mine was not intermittent. I replaced the steering valve (Steering machine as Jinma likes to call it) that made no difference. So I finally replaced the steering pump altogether and that fixed it right up. My Jinma has about a 2 quart fluid reservoir and no suction strainer. In order to get the darn pump off I had to drain the radiator because the petcock was in the way of removing the pump. After draining the coolant and removing the petcock I was able to get the steering pump off. It was a real PITA. As you mentioned I did install a 10 Micron return filter, all I did was cut the rubber hose between the hard line and the tank and insert the filter between the two. Works like a charm now. My gut feeling on yours is the "W" o-rings on the ends of the inside of your pump are flat, so your pump is not building up enough pressure. OR like you said there is crap circulating around in there. Does your steering get real stiff when it does not work? or does the wheel spin freely but the wheels do not turn? Another thing to consider is the pressure relief valve built inside the pump may be bypassing due to a week or miss adjusted bypass spring or debris like you described. I could take some pictures of my filter mod if you like. Larry Larry, thanks I would love to see some pictures. Also a link to where I can buy that kind of filter. Is it like the suction strainer mod, that kind with it's own spin on base? Sounds not if you just stuck it between 2 lines. My steering gets harder than hell when it malfunctions. It does not just let the steering wheel spin around like when the reservoir is empty or when I had that leak. There is definitely pressure, I presume. Plus, it's intermittent leading me to believe the pump works but there is more crap floating around in there. Another thing mentioned by another poster was perhaps that little restrictor inside the pump got loose again? I did not use any locktite on it. I want to try your filter mod first to see if it catches the piece of debris floating around in there. I'm hoping that will fix it. As you know, it is not an easy task to dis-assemble all that crap again. I mean I could do it, but man, I got other stuff to do, know what I mean? Rob- |
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GuglioLS
Administrator
Jinma354 LE
Posts: 1,276
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Post by GuglioLS on Sept 11, 2008 23:56:55 GMT -5
Rob, I'll have to get the pictures tomorrow as it's dark and cold out there right now. Here is the filter from surplus center----> 10 micron FILTERDoes your pump have an adjustable internal pressure relief bypass valve like mine does? If so have you tried to adjust it? When your steering works and you turn the wheel all the way to the stops and beyond, can you keep turning the wheel? How much resistance is there if you can keep turning the wheel? The reason I ask is if there is little resistance when turning the wheel past the stops, the bypass in the pump is set to low. That's how mine works anyway. Larry |
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Post by bradblazer on Sept 12, 2008 9:52:57 GMT -5
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3RRL
Administrator
Huge Kama
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Post by 3RRL on Sept 12, 2008 10:47:16 GMT -5
Thanks for those links guys.
I will order one today. Looks like they are the same and I have that Northern kind on the Kama right now, except it's the suction strainer. Does Northern sell 3/4NPT to barb fittings?
As to the bypass setting, mine must be set pretty good. When it's working correctly and turned all the way to the stops, I can barely turn the wheel anymore. So it is very positive. But I will check that too when I do this mod.
When you get a chance Larry, do post those photos.
They are always handy to see what you've done there.
Thanks guys,
Rob-
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3RRL
Administrator
Huge Kama
Posts: 2,027
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Post by 3RRL on Sept 12, 2008 10:50:39 GMT -5
I just checked and they do sell barb fittings. I'll see what size hose I have and get an adapter from 3/4NPT to what ever the barb I need.
Thanks again...
Rob-
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GuglioLS
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Jinma354 LE
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Post by GuglioLS on Sept 12, 2008 11:37:37 GMT -5
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3RRL
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Huge Kama
Posts: 2,027
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Post by 3RRL on Sept 12, 2008 14:01:53 GMT -5
Excellent Larry, thank you.
To gain more pressure from that internal bypass relief valve, do you screw it down (clockwise) like most?
Rob-
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GuglioLS
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Jinma354 LE
Posts: 1,276
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Post by GuglioLS on Sept 12, 2008 20:59:27 GMT -5
Excellent Larry, thank you. To gain more pressure from that internal bypass relief valve, do you screw it down (clockwise) like most? Rob- My pleasure Rob, I assume you would get more pressure if that screw was turned in. Since my pump is mounted in such as fashion I have access to that screw when the pump is installed, did you want me to try messing with it to see what happens? After looking at your pump pictures again, I see access to that port on yours is underneath the pump. Impossible to get to when installed? Our pumps look just about exactly the same. Did you remove the other SHCS to see what was behind it? In other words, does your pump have that adjustable screw for the internal bypass like mine does? Larry |
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