mitch504
Senior Member
Not my field, but don't most mining dozers run narrow tracks....?
Dry is no seals as far as I'm concerned, or I guess it could be sealed but no lubrication. You'd have to ask.Are what you call greased chains the same as "dry chains"? The track shop has a set of dry ones (no lube) that they recommended if I were going to sell the machine.
if you would call widths in the range 24-28" narrow I suppose the answer is yes.Not my field, but don't most mining dozers run narrow tracks....?
if you would call widths in the range 24-28" narrow I suppose the answer is yes.
Big thing with smaller machines is that invariably you see machines in LGP configuration (or non-LGP with wide shoes) working on hard ground. Nothing is going to take track pin joints out fast than that.
Agreed. That's why Positive Pin Retention (PPR) track links on the bigger dozers have been such a success - the links don't spread. What's amazing to me is that PPR is now available as far down the range as D5 tractors.The primary failure is the spreading of the big ends of the links on the track pins and exposing the seals along with lessoning the tension holding them in place.
18" is standard shoe. If you don't have sinking problems the narrower you can go on shoes the better it is on the chains.My D6C has 20" pads so not too wide.
Almost always run in soft ground.
About 25 years ago I was working with a communication company installing optic Fibre cable. They D10n, D9ns and 2 375 Komatsus doing the prerip About every 2 weeks a Cat fitter was out fixing leaking or dried out pins. The Komatsus were never touched. I understand that improvements could have made in 25 odd years.Based on his commentsabout twisting, etc, I'd be interested to know how that works in mining. The dozers almost never run on level ground yet SALT joints losing lube are almost unheard of these days.
Where to start.? PPR, deeper hardened links, improved pin/bush joints, improved seals, different lubricant all within the last 20 years that I can remember. Probably other improvements also. This afternoon I asked around the shop when was the last time a D10 lost a pin joint here due to a seal failure and nobody could remember without digging into machine history files..... which I guess shows how infrequent it is.About 25 years ago I was working with a communication company installing optic Fibre cable. They D10n, D9ns and 2 375 Komatsus doing the prerip About every 2 weeks a Cat fitter was out fixing leaking or dried out pins. The Komatsus were never touched. I understand that improvements could have made in 25 odd years.
Indeed. A 150,000lb D10 can run on 24" wide shoes..........Well thats interesting.... my D6C 10K has 24 inch tracks and I was thinking that was the narrow. Silly me.