fmatemberere
Well-Known Member
Our D6R is pushing transmission oil through the breather after the oil is warmed up. Please help
There's why the oil is coming out of the breather. It sounds very much like oil is going into the converter housing and not coming back correctly, so the level in the transmission drops. If more oil is filled into the transmission then eventually the whole system is full of oil and that's why it's coming out of the breather.This oil leak is draining the Transmission very quick and needs topping up very often
Did you find the problem ?Thanks Nige,I will have to get the serial number on Monday when I go back to work.
I found out that there is an oil hose from the Torque converter and another one from the Transmission case and both going to a T piece going to the breather. I am thinking the Torque converter is over filling with oil thereby leaking some of the oil into the bell housing and some oil through the breather since the Transmission and the Torque converter share the same breather.
This is just my thinking but cannot figure out the cause for this excess oil in the Torque converter.There was not any work or service done on this machine.This oil leak is draining the Transmission very quick and needs topping up very often to be able to carry the tests.
Thank you all for your help.
Took hose off that has screen in it at torque converter didn’t find any trash. Did find several gallons of oil run out of torq converter. I put the hose back on restarted the machine same problem.Clean the screen at the bottom of torque convert for scavenger pump as nige stated
The replacement pump could still be the source of your problem.Previous owner replaced the scavenge pump assembly 3 months ago with a reman from cat
This will be a 2-person job. Remove the hose again and drain the accumulated oil form the converter housing then leave the hose disconnected. Make sure you have plenty of oil in the transmission case.Did find several gallons of oil run out of torq converter. I put the hose back on restarted the machine same problem.
Pretty much. Stall it in 3rd gear with the TC drain plug out. I would suggest only doing it for 30 seconds and measure the quantity of oil that drains into the bucket, that way it ought not to spill over like his did.At the 26 minute mark of this video he tests filling a 5 gallon bucket; I know it’s a D8; but Nige is this (general) procedure for a D6 too?
I don’t.Do you have 2 pressure gauges.? One capable of measuring up to 250psi and the other up to 100psi.?