Installing it again was ALLOT harder then taking it out. They said they would not warrantee the pump unless they went through the drive motor to make sure it was clean of debris. Cost to rebuild the pump was $2K and the drive motor was another grand. John Deere L-Series dozers have technology options that will increase productivity, allowing you to get to grade faster with fewer passes. I pulled the pump and drive motor out myself and brought them to the shop to have them rebuilt.
I had to back it up from the area I was clearing, to my work shop. That quickly went from very annoying, to totally losing all forward control. 850K CRAWLER DOZER 850K Standard Equipment ENGINE: John Deere PowerTech PSS 6.8L certified to FT4 / Stage IV emissions 187 SAE Net hp (139. I would push forward, then try to go backwards, only to have it sort of turn on my first and do it's own thing. When the pump started to fail, the first thing that I noticed was that it stopped responding to what direction I wanted to go. Hopefully your local Deere dealer will be more helpful then what I experienced.
They have allot of power and I'm pleased with it overall, just not excited about Case and their lack of support for this dozer. I use my dozer on my land, so it's not that big a deal. On my Case, it either does fine, or you have to give it a little more pressure on one side or the other to keep it going straight. Like already mentioned, one of the biggest complaints about the drive of the pumps is keeping them adjusted so they track evenly. They machined those parts themselves after failing to find them for sale anywhere. Same story, Deere no longer carried those parts and you had to buy an upgrade, replacement pump. Later, when I had it in the shop for a rebuild, the guys at the shop called Deere to see if they had a few parts that they couldn't find. I might be that I have a Case dozer, but they would never confirm that it's the same pump, but never got back to me on the price of a replacement pump. I called Deere and they pretty much said the same thing, but were not as helpful about it. When I lost control of one of my pumps, I was told by Case that they no longer support those pumps and that a retrofit, new, replacement pump would cost $25,000. I don't know what model 850 they were used in, but it is hydrostatic drive. I've seen wheel motor seals on sprayers blown out do to cold oil creating too high of charge pressure.I have a Case 1550 dozer and it has the same Sundstrand hydraulic pumps in it as the 850 Deere. Id be careful driving it much or reving the engine up much when the oil is that cold. I let it idle for 45 minutes before moving it though. Hydraulic oil takes longer than transmission. Mine just lights the dash with no beeping. If it is cold out that was probably not long enough to warm up.
#John deere 850 dozer code f640 manual#
Posted 21:11 (#3744293 - in reply to #3744230) Subject: RE: Deere 850C Dozer codes Illustrated Factory Diagnostic, Operation and Test Service Manual for John Deere Crawler Dozer model 850J with Engine 6090HT001 This manual contains high quality images, diagrams, instructions to help you to operate, maintenance, diagnostic, and repair your truck. Ran maybe ten minutes and mostly idle and straight tracking Is that when you start it up cold? If so its just because the cold oil doesn't flow so well, let it warm up. Posted 20:49 (#3744197 - in reply to #3744181) Subject: RE: Deere 850C Dozer codes John Deere L-Series dozers have technology options that will increase productivity, allowing you to get to grade faster with fewer passes. Transmission and Hydraulic filter lights would come on also and warning light would go off. Your display should read sp1.6 by default, before changing speeds with the button. I believe those are just normal speed level indicators. Find your John Deere Fault code here with the most uptodate information and advice. Additional codes are being continuously added. Results are documented with possible symptoms, causes, and solutions. What do sp1.6 and sp2.3 says for the issue? Enter your John Deere Fault Codes in the box below.
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