![]() With the success of the 850K, we only thought it was logical to expand the K-Series’ offerings.”Ī John Deere PowerTech 6.8-L (700K, 750K) or 4.5L (550K, 650K) IT4 (Interim Tier 4) diesel engine provides an increase in horsepower from the previous J-Series, along with increases in overall tractor weight, resulting in more productive machines. “Our customers wanted an IT4 engine, a quieter and more comfortable cab and the unsurpassed operating ease and maneuverability they have come to expect from John Deere. "We’re excited to add four efficient and productive crawler dozer models to the John Deere line-up," says Jon Gilbeck, global product marketing manager for crawler dozers, John Deere Construction & Forestry. The 550K, 650K, 700K and 750K crawler dozers build off the popular and successful 850K that launched in 2011. We will make sure to check the shift linkage.John Deere is adding four models to the K-Series crawler dozer line, providing contractors an emissions-certified machine that affords higher productivity, increased uptime and lower daily operating costs in earth moving and grading applications. I have found that the clutch drums, collectors and a few other parts are very hard to find replacements for. ![]() When and if the clutch back no longer meshes with the drum, will the clutch start to slip? In regards to the clutch backs, do you know why the clutch drum doesn't have full sprogs where the clutch back sits? There looks to be decades of wear on that part of the drum and only minor wear on the clutch backs which make me think they have been replaced. My guess is that the logging company that had the dozer did a minimal repair just to get the machine running and sellable for auction. We found aftermarket sealant on every part that had been taken off and re-installed, marring on many non-sealing surfaces due to poor disassembly and install. for example, the converter looks new, the friction discs in the forward and reverse clutches look new but we found that many of the steel discs were warped(1 in the forward and all in the reverse clutch), the clutch backs look to have been replaced. None of the o-rings on the lube system look to have been replaced.įrom what i can tell the dozer has had some serious repairs done to it in the past. We were pretty sure that the machine was just a 550 but i wrote it as its seen on the machines badge.Īll the rings i have got access to look almost new. Once we have it back together we will be sure to do pressure tests to see where everything stands. We found a few things we could tell needed replacing, most of them we were able to order and will have next week. Since we were that far in we thought it best to inspect the trans. First off because we didn't know that was a helpful piece of info to have and secondly there was such a large oil leak that we felt we needed to address that first. Hoping that all these repairs will stop the oil leak.Īs for the issue with reverse being weak, it worked fine on flat ground but would not bake up a hill and barely backed onto our trailer when we bought it.Īny info or advice yall have would be awesome and greatly appreciated. Kinda wondering if the converter housing(which holds most or all of the engine weight) being unsupported is causing the converter seal to not be centric around the converter. We have repaired the housing the best possible. We also found that the converter housing had broke or worn threads for the 4 large bolts that hold through the frame rails into the sides of the housing. Now that everything is apart it doesn't seem to be damaged but could very likely be worn. ![]() Our initial thought was that the converter oil seal had gone. It looked like all the oil was coming out of the small hole at the bottom the the converter housing, but upon tear down I noticed the fitting on the trans pump was not tight against the pump housing, feel like that might have been some of the leaking we saw. The main reason we torn into the machine was because we had a really bad oil leak from the bottom of the converter housing. ![]() We will have to see if the collectors are still available, we have found some parts that we can't get from john deere.ĭO YOU KNOW OF ANY PLACES TO FIND OBSILITE PARST? If the inside to the collector is supposed to be completely smooth then yes they are slightly grooved. ![]() We haven't seen what a new collector looks like so it's hard to say if they are grooved. The collectors for first/second and third do show signs of where the shaft seals sit. We didn't notice any problems with first, second and third so we left those clutch packs and shafts in place. We have pulled the converter housing out to get access to the front of the powershift housing which allowed us to pull the forward and reverse clutches. ![]()
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