Hello,
I have a hyd. dozer attachment on my D4. The point where it hooks onto the mounting pin has 1.5" - 2" of travel forwards and backwards as you apply and relax the blade. This seems to cause the blade to be uneven. Is there a range of movement that is supposed to be here, or is it worn from round. Only had the cat 1 week and still waiting for the manuals I've ordered. Any info would be more than I have.
Thanks

Is that a Cat Angle Blade?
Sounds like you are referring to the center pin where it attaches to the "C" frame. When it was new it had very little play and an eccentric vertical pin with a two hole bolt flange adjustment to take the slack out. A poor design to begin with.
The horizontal swivel, "C" frame bushing and retainer are still available after market (or were). The eccentric vertical pin has been obsolete forever. Best fix is to set up for bushings and straight pin.

Thanks for the reply
Sorry but not sure what a Cat angle blade is.
The rear of the arm coming back from the blade looks like a reverse C. This slides on to a large fixed pin on the machine. Once you have it on the large pin, there is a smaller diameter headed pin that goes down through the top of the C in the arm to retain it. I know i'm not explaining this well, the small pin basically closes the end of the reverse C so that it can't come off the large pin. Is there supposed to be a bushing in the arm? Should the end result be close to a round hole? The small pin is pretty much a 5/8" round stock (or bolt)with a washer welded on the top.
Thanks again

That does sound like the Cat setup......there are early and late versions....this is the late version. Little hard to make out the parts diagram.
The original vertical pin had an eccentric to it. Not much point in going there as it never did work very well and sounds like you have a make shift pin in yours. The holes should be round and the pin a reasonably tight fit. Bushings would help recover the fit and improve wear life.

If this is the type of blade I think you're describing, here's a relatively quick procedure to cure the wear for a while. Some of those blades didn't have the bolts and caps that held the blade side arms in place, they used pins that just dropped in vertically and locked the side arms in place. Not one of the brighter ideas. . (Picture a cent symbol, that's what it looks like)

The slop (wear) is where the side arms of the blade fit the pins on the track frames, the best bet is to find a short chunk of something that has the same inside diameter as the pins, split it and weld it into the blade side arms. Block up the side arms, pull the lock pins and back the tractor up a couple of inches. Fit the split pieces against the pins on the front of the track frames and tape 'em in place, then run the tractor ahead back into the blade and see if everything fits. Drop the lock pins back in (if they won't go, the chunks taped in place are too thick and need to be ground) and when everything is the way you want it, weld those chunks in place in the ends of the blade side frames, NOT on the pins.

I would suggest that you work out the issues of loose center pins before modifying the side pin sockets or you may find that you are unable to pin both sides if you reverse the sequence.

Thanks for the info. Spent a couple of hours trying to send pics. My twevle year old resized and attached for me, although too fast for me to see what he was doing. Guess I'll stick to trans repair and leave the rest to him.
Maybe these will help indentify.
Old Magnet, Thanks for the pic, mine does not have the caps on the ends that this appears to.
Like to say I cant wait for my manuals, but I didnt order one for attachments. I figured this came off something else and was added later. May have to get one coming.
As always, any light you may shed is a huge help.

Well, one pic wont load. Guess junior isnt as smart as he thinks he is

It doesn,t look like Cat Blades that I ever seen.

SJ,
Guess you already know, but thats not what I was Hoping for!
More like " Very common, Dime a dozen" type things would pick my day up
Thanks for the reply, every bit helps

hello Atlaspp ,your blade looks to welded on with on pin holding it at all ,look at the pic ,the movement maybe coming from there or you have broking weld some were ,bruce oz