We've found that it helps to not get greedy. Make one pass with the ripper 2 1/2 ' in, then make a second pass in the same slot with the ripper buried. It's overall faster and avoids much of the track spin.
D11T/D11T CD: ЭКСПЛУАТАЦИОННАЯ МАССА 104236 кг, Бульдозер Komatsu D375A-5 Эксплуатационный вес достигает 66 985 кг. KOMATSU D 475, Эксплуатационная масса: 99980 кг. 475 сделал бы 11, как ребенка. Поставили на видео 375, который весом в два раза меньше 11.
your 100 percent correct there stephen . the guy operating this 375 is me & the problem here is in worn & sloppy joy stick linkages. what would happen is iff the tractor leaned to a side the worn linkages would activate the steering clutch to the lower side track & i can assure you it was an r-sol to drive like that the problem has been repaired with new linkages. thanks for the post buddy.
I've run 375A-6 and D10T in the same pit. I think the Komatsu is a better ripper (yes it is about 5 tons heavier) and the CAT a better pusher. The operator station in the CAT is far superior to the Komatsu. Operator skill plays a bigger part in production than any other factor, though.
D11 is cats biggest dozer a D375 looks more like a D9 or D10 Komat has a much bigger dozer in both the D 475 and the D575 which has over 1100 hp. and the D 11 has about 800 hp if I remember.how can these diffrent machines be compared in this lopsided way.Also its not the machine but the operator that makes the diffrence in my opinion.The 475 would be a more equal match for the D11.If both operators were also of equal ability.
Carl Delucia you are very right .its who is sitting in the seat that counts. Most operators on these RU-vid channels don’t know how to use a ripper proper
Y’all can bicker all ya want who’s bigger who’s better but I’ve worked heavy equipment for 36 years both machines are very impressive and are going thru hell.
I'm glad she's fixed, as you know a fellas reputation could be ruined if the final drives, or steering clutches went and the mechanic or boss blames you because if a poor maintence schedule or they are too lazy
geographically this quarry is a long long way from where you are.. what we,re in here is solid sandstone & if tried to rip fast you will actually get nothing done except increase the posibility of ripping the arse end out of the tractor..riding the dethrottle hence sloweing down the tractor helps in the boot getting penetration & also aids in preventing track spin which inturn aids in getting traction & also saves energy being wasted & also saves in wear & tear on the walking gear..
I have read m all comments and find somewhat interesting. I have been running dozers now 12 years on crushed limestone stock piles. 2000 tons per hour off of 7 stacker belts. Dozers D9R , D9 t and now a kamatsu D275. The 9r was 575hp 9t 410 hp D275 449 hp. D9r hands down the winner. All new machines when I got them. We have 1778hrs on kamatsu now and the only problem that I can see so far is the transmission, it won't let you work machine hard enough to load blade fully on the grades I deal with nitely. Will load just to slow. Kamatsu more user freindly than the cats. But I have to run hard and fast. Push in slot in second gear. Kamatsu won't do it. D9t will. For a first gear machine D275 better. I work 12 hrs a nite alot of sat as well. My oppinion. Know one builds the right dozer for our application. Need a 60 ton machine, no ripper, dual tilt and 525 usable hp. . Ps 38000hrs on D9r. 28000 hrs on d9t, its gone . Thanx
@swn02 komatsu has a electronic shoe slip control thats adjustable. wen track spin is dected it cuts engine revs.but myself & other 375 operators i know turn it off & ride v decelerator like in cats.
The komatsu is going to have serious problems if the operator keeps steering under maximum load . I worked with a guy that took out steering clutches on a D9 and then the transmission doing that
Hi 13frontrow, Nice to 'see' you again. Thanks so much for this really great and practical as well very 'watch-able' video, good stuff! Can I just take a few words to wish you a happy Holiday, OK? Take care mrbluenun
Tough Conditions which even with skilled operators will wear out Running Gear, Sandstone has a high silica content which increases wear in a big way, Its just a part of the job, Wear it out , make profit, mend it end of story
I wonder if they were trying to preserve as much of the coal vein as possible by intentionally shorting the blast.. you can clearly see the coal just under the ledge of rock.
Rod Rankin I think cat fan post this video. Tries to show that cat is stronger than Komatsu but that lied high track it's not good at ripping. It's good at grading and keep motor a way from dirt.
there ripping solid sandstone..sandstone is not a volcanic rock & is placed in layers by water millions of yrs ago..this material here is being crushed for use as road base & with proper compaction methods is extremely sucessful..thanks for asking ..
That 375 is on par with a D9 I’ll tell you it’s giving that D11 a run though there great machines those Komatsu dozers it’s all in the weight of the dozer and the experience in operator
It was a surprise to me that the Kamatsu did so well, and as you say showed it has balls. But I would imagine it has to use more fuel (perhaps) and or higher revs to achieve this? Just a thought in a general kind of way as I do not have the spec' of either in front of me and have never touched either! Take care mrbluenun
Donald Ulrich I was thinking the same thing, but really there is no need to have a low gear lower than needed to spin the tracks on a very grippy surface. If dozer was 100 tonnes heavier then a lower gear would be of considerable use.... I think :-)
Rolling the ripper ahead slightly more after penetration will give the point a better angle to help "lift" the Rock. I run both of these at a coal mine. That is hard rock.
On ne peut pas comparer, un des bulls peut buter contre un énorme rocher enfoui alors que l'autre n'aura que de la terre à fendre. De plus le soc peut descendre plu ou moins profond. Seule une traction au dynamomètre peut indiquer qui tire le plus fort.
Un bull de 100 tonnes pour 10 000 ch ne tire ou pousse pas plus fort qu'un de 1000 ch, car c'est le poids qui compte et si avec le 1000 ch la chenillle commence à patiner, elle patinera tout autant avec le 10 000 ch. Et pour arrêter le patinage il faudra alourdir le bull, de dizaines ou centaines de tonnes. Compris ?
oh & by the way the look & sounds of this machinery is quiet normal for machinery of this age that has worked in this environment all their lives..this D11 has well over 30,000hrs & is still going strong & making the boss money..buddy i realise from ur remarks that uv not had much experience in hard rock mining & its a completely different job then operating in dirt .. im not taking ur comments down i,ll leave them there for the viewers to see & let them comment on what we,ve both said. thanks.
put theD 575 in there with the kitty and then see how that goes the 11 is alot heavier than theD 375 any way big dozer men know this is an un fair comparison so wait till the D11 and a D575 rip together in the same seam of rock in a quarry
@LWH088 actually this 375 isnt to reliable either but iv also seen some CATS that are lemons.actually we,ve got an old dash 2 375 [seen elsewhere on my channel] with 24000 original hrs on the engine & still going strong that sort of hrs is unheard of with cats. also i was on that old 375 in sydney digging a hole for a underground car park along side 2 D10N,S % 1 last of the series D10R [whitch is virtually a D10T]. & blew the arse off them ripping & pushing. true story i was the last dozer on si
surprised they dont have draught control on dozers like a tractor, so you can just drop it in and let the tractor control ripper lift when track spin is detected
I'm not trying to be a smart ass - just delete my comments I would like to know where the operation is, and who runs it. Guaranteed you can do much more with a lot less effort as well as get that machinery back into shape. You obviously take pride in your work and you should. I w
i can give a pretty good estimation of what i can do per hour or per day without having to walk around measuring crap..you just keep driving [not operating] ur big ol 657 lil boy & dont worry bout what dozer drivers are doing keep ur mind on ur own job cause i can tell you dunno what ur doin & you got a lot to learn..oh & another thing since you dont have any videos of ur own to show the world how good you are well really ur words are pointless..you are a first prize DUMB FUCK..
ouch that hurt.. ur welcome to criticise but can you explain how its meant to be done with out killing the tractors..the thing is you cant thats why ur a dumb fuck..
well dumb fuck!!! you been telling us we should be going faster which is going to make more track spin..you really have an educational problem where dozers are concerned.. & of course grousers wear out you dumb fuck moran..
experience is the reason you can't tell how your machine is running. for example - you don't know how much rock you ripped, pushed for the day. you couldn't tell us how long it takes that 375 to push 200m3 of loose rock 30m or even how many passes are required. Arrogant Aussi -you don't have the experience to carry an operators lunch box to work. just watching you rip was painful
