D8 13a

D8 13a

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straycat.inc

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I read a post in another Forum, about a 13A having updated hydraulic steering clutches. I thought that 13A's only had spring boosters. Does anyone know if there are hydraulic boosters available for the 13A D8's Thanks Richard

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Tue, Jun 9, 2015 10:30 AM

Old Magnet

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There at one time was an aftermarket set up to apply hydraulic boosters to the steering clutches......

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Tue, Jun 9, 2015 12:06 PM

straycat.inc

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Reply to Old Magnet:

There at one time was an aftermarket set up to apply hydraulic boosters to the steering clutches......

That was quick, Thanks Old Magnet

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Tue, Jun 9, 2015 1:01 PM

Inter674

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Reply to Old Magnet:

There at one time was an aftermarket set up to apply hydraulic boosters to the steering clutches......

thanks OM

just what i need for the D2 - should be able to be bullt using eg., an automotive power steering pump and reservoir etc.

What a neat idea - and certainly will make the operator's job easier by better defining all those #@%# levers😊

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Tue, Jun 9, 2015 1:04 PM

old-iron-habit

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[quote="Garlic Pete"]Where are those pictures of that 2U which needs to be helicoptered out? That had the same Rivinius adaptation kit.

I still think we need to get a couple of D6Cs and take a run at that one.

Pete.[/quote]

There is a 2U with the Rivinius steering setting in the woods a couple miles from my house. I tried to buy it a while back and found out that a casual friend had bought it about 5 years ago. Now that he is home from the ND oil fields he got busy and got it started a few weeks ago. He discovered the main clutch is stuck. He tried starting it in gear with the steering clutches tied back to no avail. He currently is taking the main clutch out to free it up. This one may be walking out of the woods one day before to long.

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Wed, Jun 10, 2015 3:34 AM

Inter674

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wise words Garlic Pete and I can attest to fear and excitement when clutches stick eg., on a restored Fergy 28 tractor backing towards a house wall😊

My daughter asked me later 'Dad how many F's and B's did you put into that sentence?

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Wed, Jun 10, 2015 7:03 AM

old-iron-habit

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[quote="Garlic Pete"]If that unit works the way I recall others I've seen, it may be a good thing he didn't get it started in gear.

I believe these Rivinius units provide no direct physical connection between the steering clutch levers and the clutch release yokes. This means, if he had gotten it started in gear, expecting to pull the steering clutches back for control, he might have found no way to stop it except shutting it down.

I believe the steering clutch levers are simply connected to hydraulic valves, which then activate small hydraulic cylinders on the clutch release yokes. When you first start it, until the pressure builds up, you have no way to release the clutches. In normal operation, pressure builds almost instantaneously. In something that has been sitting for years, however, the fluid has most likely leaked out of some dry seals over time. This would leave you with a likelihood that you'd get no steering until you added fluid.

Even if it had fluid, there are lots of potential problems, stuck or plugged valving, rusted valve linkages, bad pump or seals, etc.

All in all, if they work the way I think they do, I'd want that master clutch releasing before I got that thing started in gear. If you had plenty of room and knew what to expect, you could always just be ready to kill the engine, either with the throttle or the decompression, of course. Not expecting that, though, and with maybe some trees or rocks in front of you could lead to some excitement!

Pete.[/quote]

That is exactly what he was thinking would happen. He had the fuel off and the compression released to see what would happen. It started to move and the decision was made to fix the clutch in wood tick heaven.

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Wed, Jun 10, 2015 8:33 AM

kracked1

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Reply to old-iron-habit:

[quote="Garlic Pete"]If that unit works the way I recall others I've seen, it may be a good thing he didn't get it started in gear.

I believe these Rivinius units provide no direct physical connection between the steering clutch levers and the clutch release yokes. This means, if he had gotten it started in gear, expecting to pull the steering clutches back for control, he might have found no way to stop it except shutting it down.

I believe the steering clutch levers are simply connected to hydraulic valves, which then activate small hydraulic cylinders on the clutch release yokes. When you first start it, until the pressure builds up, you have no way to release the clutches. In normal operation, pressure builds almost instantaneously. In something that has been sitting for years, however, the fluid has most likely leaked out of some dry seals over time. This would leave you with a likelihood that you'd get no steering until you added fluid.

Even if it had fluid, there are lots of potential problems, stuck or plugged valving, rusted valve linkages, bad pump or seals, etc.

All in all, if they work the way I think they do, I'd want that master clutch releasing before I got that thing started in gear. If you had plenty of room and knew what to expect, you could always just be ready to kill the engine, either with the throttle or the decompression, of course. Not expecting that, though, and with maybe some trees or rocks in front of you could lead to some excitement!

Pete.[/quote]

That is exactly what he was thinking would happen. He had the fuel off and the compression released to see what would happen. It started to move and the decision was made to fix the clutch in wood tick heaven.

I know where there are 2 of those. One is on a machine that walks and talks. The other is on one that may some day....

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Wed, Jun 10, 2015 9:34 AM

cojhl2

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Reply to kracked1:

I know where there are 2 of those. One is on a machine that walks and talks. The other is on one that may some day....

It is absolutely asking for trouble no matter the circumstances to start one of these heavy machines in gear. Maybe if there is someone sitting in the seat it may be excusable, but to be alongside and try to reach a lever across those moving tracks will be a quick way to heaven.

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Wed, Jun 10, 2015 10:18 AM

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