I have a cat D7F 22” pads with the leading inside edge of several pads broken?? Any suggestion on what would cause this?
They are worn thin and your were working in some kind of hard rock.
Post some photos of pads with broken edges for confirmation.
Turning into rocks and worn?
I do apologize for the delay. Attached are some pics of the broken track pads.
I think the last photo may be the key, although it will need some more photos to confirm. Unless it is a trick of the photo the two lines along the trailing edge of one shoe and the grouser bar of the adjacent shoe appear to show misalignment with respect to one another. The most likely cause is excessive pin/bush wear in the track chain. How about some more photos of that particular pin joint taken from the side and from underneath.?
The trailing edge of the leading pad is broken off from being thin and a very tough rock or piece of steel being caught between the two pads as they run around the idler or the sprocket. It is pretty normal condition as the pads get older. It isn't something to be concerned about.
Your chains are causing the issue due to be worn. Just keep running it as it is until further notice.
More pic’s View attachment IMG_6254.jpeg
Your tracks are pretty well worn out.
Looks like someone tried to hammer that pin out, got pissed it wouldn’t move, then used something to “push” it out, but in the end only tweaked the links/bushing, so now it’ll never track/wear correctly. If your leaving the tracks as-is in the short-term, I’d cut more off the pads to let them clear each other, atleast you’ll have one less metal-to-metal situation…
Thanks Gentlemen for the information. 1. What are some good sources for Track assembly’s? 2. Would you recommend used track? 3. What type of hydrauic fluid is reccomendated for machine. (D7F 94N6279). Engine 3306
Answering your last question first - the recommended hydraulic oil for your Serial Number is an SAE10W viscosity hydraulic oil with a zinc-based additive package. Pretty well every lubricant company on earth will produce one. If you don't have one already then you should get hold of an Lubrication & Maintenance Manual. The Cat Publication reference is GEG00535. You can get a copy in CD format from the Cat publications web site for $30. Now to your first two questions, which is a much more complex subject that needs a lot more information in order to answer. First up, approximately how many hours per month/year are you looking at operating the tractor.? Next is that the undercarriage is a system consists of far more than just the tracks. The condition of the following influences the system operation. Drive sprocket Track frames, track guiding guards/hardware (if fitted), and pivots Equalizer bar and suspension Track rollers Carrier Rollers Track tensioner & Recoil mechanism Front idler and mounting. So I guess your first task is take a shed-load more photos illustrating the condition of all the above.
I'd take bets that wear was caused by the pin bosses on the links rubbing up against well-worn track rollers. Photos of said rollers would confirm that.