Diesel powered Hi-Ranger

[Al Smith]

I did fiddle with Toms IH with a 50 some foot Hi-Ranger today .

It seems because the thing is more modern electric controls with no mechanical linkage to the engine speed that it uses a rather peculiar speed increase on the hydraulics .

Evidently the speed increase uses a flow switch after the proportioning valve which triggers a relay connected to the cruise control .How damned dumb is that .:roll:

Of course there are no two bucket trucks set up exactly the same which makes a puzzle of things .In addition none of the actual Hi-Ranger tech manuals cover everything ,so it's guess work .

From what I've been able to trace out ,the flow valve causes a ground path to the relay which in turn activates the cruise control upon the flow of hydraulics which is activated by the "dead man " switch and thus flow to the boom .Clear as mud .

No 12 volt to the relay,cause unknown .Tommorrow is another day .We'll get it .Always do .

 

[SkwerI]

My old altec throttle was activated by the deadman also. My newer one is designed to run at an idle all the time but there is a manual button next to the pistol grip you can push to bump the speed (for tool use only, it says).

 

[Al Smith]

The older ones had a pressure line coming directly off the pressure side of the pump .The dead man activated an electrical valve in the turret .

Once the electrical block valve was activated by the dead man and thus pressure was felt on the pump discharge ,the throttle booster was activated .

Oh what the 'ell,if it were simple to figure out anyone could do it .

 

[darkstar]

That kind of problem is why god made you Al ,because not many others can snoop that shat out.

 

[Al Smith]

It isn't that big of a deal .It's just that a lot of folks have not been exposed to hydraulic/electrical controls as much as I have .Being in the right place at the right time I guess .

Fact is just got of the phone with Tom .I told him I investigated the relay system and it just turns out that it is part of a patented system designed for wire control diesels for throttle up .Exactly what I thought .

May get a chance to delve into it more today,maybe not .Tom has some errands plus believe it or not they are starting to call for firewood so he has a load of oak to deliver .

 

[stehansen]

So now all you have to do is find out why that wire is dead, correct? Either broken wire, bad connection, or bad switch?

 

[Al Smith]

Yes I suspect that is the case .Old rule of thump ,most electrical problems are mechanical in nature .

It has taken me several years to convince a couple of extraordinary young controls engineers that very fact .

These young gents are the best I've ever seen and I've been at this for a day or two .Never the less sometimes they can't see the forest for the trees but then too that happens to all of us from time to time .No big deal .