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cat d6c 10k s/n 2041 transmission problems

traderbill

Member
Joined
Sep 3, 2014
Messages
7
Location
arkansas
I have a d6c 10k sn2041 --- old machine but has always been a great working dozer . Recently it stoped pulling and the shifter feels weird like its not shifting into gear . After searching thru my service manual and pulling the top off the transmission (which looks very clean) I had decided it was a faulty trans pump but I took the trans pump off and it looks perfect .. I did however discover that the supply pipe coming from the magnetic screen up to the trans pump was loose and slid off very easily without having to loosen any clamps --- what im wondering is could this loose connection have caused all this by sucking air instead of sucking oil up to the trans pump ?? My trans oil level is within a 1/4 inch of being full -- there is some steel shavings in the magnetic screen but I have no idea how long its been since this screen has been cleaned ... Just looking for ideas from any of you old time cat operaters -- this old dozer has been an excellent machine and I really hate to think we may have a bad trans . Thanks in advance .
 

overworked

Senior Member
Joined
Jan 17, 2011
Messages
762
Location
northeast Pa.
Yes, that is a common issue, I would replace the section of hose and some new clamps, while you have pump off I would put new bearings and seals in it, then use some heavy oil (Lucas oil additve) when you put it together to help it prime.
 

traderbill

Member
Joined
Sep 3, 2014
Messages
7
Location
arkansas
Thanks - I did find it odd that after I unbolted the pipe from the trans pump I could very easily just pull it off the magnetic screen housing with nearly no effort , but I was wondering why I had been seeing no leaking from this area at all --- I will for sure take that advice when putting this thing all back together and got my fingers crossed that is the problem !!!
 

traderbill

Member
Joined
Sep 3, 2014
Messages
7
Location
arkansas
D6c transmission or tourque problrms

Recently my old d6c stopped pulling and wouldn't shift - I posted on here that I pulled off the trans pump , which looks to be in perfect shape but the pipe connecting to trans pump to the magnetic screen seemed to slip off very easily ao I was hoping this was the problem , maybe it was just sucking air at this connection .... Today I pulled the top off the magnic screen canister and found what looks like parts of a Torrington type bearing (small rollers) and half of a Teflon looking washer about the size of a half dollar --- this makes me very uneasy ... Now im wondering of course where that came from and when -- could it be left over from yester yr and never got cleaned out of the screen after someone else repaired something or is this likely why all this happened .. We do have a considerable amount of flakey looking stuff in the magnetic screen ... Also wondering if we do have bad powershift trans what is the cost to rebuild these or if its the tourqe converter what is the cost to rebuild those ... Also if anybody has any good recommdations of a good cat mechanic in central Arkansas looks like I may be needing one soon . thanks
 

Bob/Ont

Senior Member
Joined
Sep 18, 2012
Messages
1,605
Location
Ontario
OH!!!!! that is unfriendly, can you take off the PTO round cover off the back and look in at the bevel pinion? Sounds like you may have a bearing failure. Check the pinion and the bevel gear shaft as well.
Later Bob
 
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