Taylor,I saw a dragline go into the brook once,actually a holding pond for a crusher and I think the operator was reeling in the bucket when it happened,I am not sure of that though.
He did not have much experience and that was all the experience he ever got because he refused to run it ever again.LOL
I have pics of a big rubber tired crane in the meine river in Germany...I was part of the 58th engineers when I was there and we used to put a pontoon bridge across the river every year for training and the dozer used to be the deadman for the cables that held everything in place.When we were all finished the crane guys cranked up their crane and with no air for the brakes and it rolled right back into the river.I have pics of the top of the cab and the boom sticking out as I remember.
) Spring brakes? What spring brakes.?I think of that often when I have to wait for air pressure to move whatever I am driving today.It really takes very little air pressure to stop an unloaded truck on level ground and I have worked for people who want you rolling as soon as the oil pressure is up.Us old guys remember those things.
That Northwest sounds like a pretty big one with a 5 yard bucket.
I tell other dozer guys looking for tips(dozer guys don't ask for tips 'cause we are all the best there is)that you have to have the ability to see in front of the blade,when you can do that you will have a pretty good handle on it.
Truth is as you have already observed that it is a combination of seat of the pants,the sound of the engine and travel speed is an indication of how much you are pushing.Being used to your steed is a big help too.
Boy,I get longwinded don't I? Ron