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D6T Torque Converter Problem

T

tctractors

Senior Member
Joined
Oct 9, 2007
Messages
2,411
Location
Worc U.K.
The Sun Gear drive plate on the earlier D6's had an alignment mark on the flywheel and the index teeth for the correct position, plus the springs behind it to keep it trimmed up to the snap ring, the shaft through the converter runs on 2 bushings that should only be fitted with the oil feed groves angled in a set position, it was very common to find them facing the wrong way, sad to say I would have spotted the missing bit in a second, but I have done heaps of drive dividers and can see how the missing bit was left inside the failed engine, anyhow with the cab off and all the bolts easy to turn it's not long to sort. tctractors
 
John C.

John C.

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Jun 11, 2007
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This unit is a 2017. The shaft is drilled instead of having a groove and needing timing on the hubs. The thing is just different enough to be confusing. There were no springs or index teeth in the drive plate. It looked like a different design from what I worked with years ago. I knew something was missing but couldn't put my finger on it to start with. The kids had no idea when they were swapping things. The parts drawing in SIS is not much help either. It shows the wrong side of the plate. If it showed the sun gear side, it would have been obvious.

At this point it doesn't matter how it happened and the only people who were a bit irked are the owners. They hired the kids so the issue is on them and they know it. At this point they are happy this issue is solved and they can move on. There are plenty of other issues for them to put emotion into.
 
J

Jimbo

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Joined
Mar 22, 2010
Messages
103
Location
S.E. New Mexico
One thing I have learned and taught my 20 year old son, when going into an unfamiliar machine, take a few pictures with the ever handy cell phone, just to serve as a reminder of what it looked like as it came apart. One never knows what interruptions will occur before you go to reassemble things.
 
nicky 68a

nicky 68a

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Joined
Apr 14, 2013
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1,164
Location
england
Jimbo said:
One thing I have learned and taught my 20 year old son, when going into an unfamiliar machine, take a few pictures with the ever handy cell phone, just to serve as a reminder of what it looked like as it came apart. One never knows what interruptions will occur before you go to reassemble things.
Click to expand...
Wise words.Those interruptions can be a disaster.
Whenever I service one of my tractors,I leave the dipstick on the seat until the job is complete to make sure I’ve put oil back in it
 
T

tctractors

Senior Member
Joined
Oct 9, 2007
Messages
2,411
Location
Worc U.K.
John C. said:
This unit is a 2017. The shaft is drilled instead of having a groove and needing timing on the hubs. The thing is just different enough to be confusing. There were no springs or index teeth in the drive plate. It looked like a different design from what I worked with years ago. I knew something was missing but couldn't put my finger on it to start with. The kids had no idea when they were swapping things. The parts drawing in SIS is not much help either. It shows the wrong side of the plate. If it showed the sun gear side, it would have been obvious.

At this point it doesn't matter how it happened and the only people who were a bit irked are the owners. They hired the kids so the issue is on them and they know it. At this point they are happy this issue is solved and they can move on. There are plenty of other issues for them to put emotion into.
Click to expand...
I understand your situation as it's not a good thing having to many people doing a bit, by the way it's not the shaft that has the angled grooves in it's the bushings, if the torque has been worked on it's money on that the bushings have been fitted with the grooves facing the wrong way, anyhow Nige is a sharp chap and Wizard on detail plus just a great chap to boot, as you said the owners are happy to get the matter resolved and put the tractor back to work, all this extra work at least gives a knowledge benefit to yourself and anyone reading this interesting subject, we will be into the Nitrogen cylinders next on the D6T's. tctractors.
 
JD955SC

JD955SC

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Mar 13, 2011
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1,356
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The South
I can easily see it happen.

in my shop it’s not unusual for one person to pull an engine or torque converter or transmission, send the component down to the rebuild shop, and get it back several weeks later and another person put it back in (original mechanic on vacation or quit lol) and stuff could easily get left off
 
John C.

John C.

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The bushings were not changed. Things looked near new when the torque was dismantled. It got new seals and one bearing and went back together.
 
Cmark

Cmark

Senior Member
Joined
Jan 2, 2009
Messages
3,178
Location
Australia
If you ever have dealings with a 24/7 workshop operation, you find nonsense like this happens fairly regularly. Getting quality handovers from one crew to the next is essential.
 
B

Birken Vogt

Charter Member
Joined
Nov 30, 2003
Messages
5,320
Location
Grass Valley, Ca
That is why I always put the bolts and parts back in the holes where they came from even if it takes extra time to screw them in, then out again mid-assembly - it takes less time than figuring out how you messed it up. Especially these days when it takes weeks to get simple parts, you completely forget how it came apart.
 
Acoals

Acoals

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Dec 15, 2019
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Wisconsin
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Jack of all trades/Master of none
nicky 68a said:
Wise words.Those interruptions can be a disaster.
Whenever I service one of my tractors,I leave the dipstick on the seat until the job is complete to make sure I’ve put oil back in it
Click to expand...

I do that also, one other thing I do is take the drain plug out and always put it on my toolbox, not on a frame member or the floor, and never put it back in until I am going to refill. I am either going to spot a puddle of oil or a mystery drain plug .... :eek:
 
Acoals

Acoals

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Wisconsin
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Jack of all trades/Master of none
John C. said:
This unit is a 2017.
Click to expand...

Didn't you mention in an earlier post that the torque converter or it's components was discontinued by Cat? Cat is discontinuing parts on a 2017?
 
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