D6r transmission sensor

[dimi]

Hi everyone. Three of the four transmission sensors are giving incorrect readings. My question is, is this a big deal? How does it affect transmission operation? Changing the sensors requires removing the transmission, which I'm too lazy to do. Or is there a trick to doing it without removing it?

Its Cat D6R BRJ00121

 

[Nige]

Or is there a trick to doing it without removing it?

Last question first. Unfortunately not.

However removeing the transmission for the purpose of replacing the sensors or repairing damaged wiring (a common issue) is not difficult. You could probably have the transmission slid out, repair the sensors, and have it back in the machine again the same day.

Three of the four transmission sensors are giving incorrect readings.

What Diagnostic Codes do you have exactly.?

Did you succeed in resolving the overheating issue you had before.?

 

[dimi]

Last question first. Unfortunately not.

However removeing the transmission for the purpose of replacing the sensors or repairing damaged wiring (a common issue) is not difficult. You could probably have the transmission slid out, repair the sensors, and have it back in the machine again the same day.

If you say the transmission can be removed and installed in a day, what steps are required? Can it be done in the field? Or do you need any special tools or equipment?

What Diagnostic Codes do you have exactly.?

Code 113: 671.02, 672.02, 673.02 were active.

Did you succeed in resolving the overheating issue you had before.?

Regarding the engine overheating, the problem persists.
I replaced the belts and 2 pulleys, tightened the belts so they wouldn't slip.

and also removed Power Train Pump, Priority Valve, torque converter output Valve to rule out any blockages or malfunctions.
I also checked all the sensors and found them to be faulty.
If all this doesn't work and the system continues to overheat, the only thing left to do is remove the torque converter.
Also, due to the fact that the oil pressure on the transmission main relief valve was 320 psi and did not rise anymore. What could be the cause of this? Is the bearing-sleeves on the pump bleed off oil pressure?

 

[Nige]

Code 113: 671.02, 672.02, 673.02 were active.

Try these diagnostic procedures first and see what the results are.
the fact you have al lthese Codes together suggests the possibility of a wiring fault.
Check your message inbox.

 

[Nige]

Attached is the procedure to remove the transmission & bevel gears as a unit. In your case you would not be removing it completely from the machine, only rolling it back far enough to gain access to the speed sensors & wiring. There are two rails inside the rear case. The transmission has rollers that sit on those rails. The FT-1897 Bracket (which you can fabricate - I have a drawing) is used as a lever to support the weight of the rear end of the component in a similar way to the handles of a wheelbarrow while it is rolled out of the rear of the tractor chassis. If you have some way of supproting a weight of 4-500kg while the transmission is rolled backwards you should be fine.

 

[dimi]

It turns out that the transmission needs to be unbolted, and using this Tooling A, I need to hang the transmission and move the transmission away? it doesn't look very hard.
Will the lower ripper plate get in the way?
Like in the picture. Or will it drop below the gearbox?

 

[Nige]

Will the lower ripper plate get in the way?
Like in the picture. Or will it drop below the gearbox?

With the ripper frame at that angle the answer is - doubtful. What you could do is either: -

1. Find a piece of soft ground and jam the ripper into the ground as far as it will go. You may have to move the tractor slightly foward while you are doing this so that the ripper tooth digs into the ground. That will put the ripper frame around or past the horizontal and allow the transnmission to pass over the top of it as it is pulled backwards out of the rear case.

2. Remove the ripper shank completely by parking the machine over a hole that has sufficient space for the shank to drop down far enough to come completely out of the ripper frame. Once the ripper shank has been removed the ripper frame can be lowered far enough to permit the transmission to pass over the top of it.

 

[Deimos]

Hi everyone. Three of the four transmission sensors are giving incorrect readings. My question is, is this a big deal? How does it affect transmission operation? Changing the sensors requires removing the transmission, which I'm too lazy to do. Or is there a trick to doing it without removing it?

Its Cat D6R BRJ00121

Unfortunately, you'll have to remove the entire transmission. Here's a photo from a similar bulldozer with a different prefix. The number of sensors may differ from yours, but the principle is the same.

 

[tctractors]

A few bits to do getting the transmission out if you go for the complete lump or just the back bit as in Deimos picture, if the speed sensors are damaged on the end you have another problem like a bearing to look at, the big bit comes out on the rail but needs supporting all the way with lifting gear at the outer face, the rollers are on the end of the lump and hold only the inner end, on the transmission getting hot some more detail is handy, is this a Diff Steer unit with the 3306 in?

 

[Nige]

on the transmission getting hot some more detail is handy,

A whole thread on it Tony. See here. Make yourself a cup of tea before you start reading. She's a long 'un.......

https://www.heavyequipmentforums.com/threads/d6r-overheating.120250/

 

[dimi]

With the ripper frame at that angle the answer is - doubtful.

First, I need to find these sensors. I called all the local dealerships, but they don't have them. Delivery is two weeks away.
Once they arrive, I'll try everything I can to replace them.

Unfortunately, you'll have to remove the entire transmission. Here's a photo from a similar bulldozer with a different prefix. The number of sensors may differ from yours, but the principle is the same.

In this case, it will be necessary to carry out a major overhaul of the transmission, including replacing the clutches and discs.

 

[Deimos]

First, I need to find these sensors. I called all the local dealerships, but they don't have them. Delivery is two weeks away.
Once they arrive, I'll try everything I can to replace them.

In this case, it will be necessary to carry out a major overhaul of the transmission, including replacing the clutches and discs.

It's possible the problem isn't with the sensors, but with the sensor wires. That's exactly what happened in the photo above.

 

[Mobiltech]

Also keep in mind the sensors will throw codes if the transmission is slipping. The ecm reads it as a bad sensor rather than a mechanical failure.
If you’ve got it out inspect it for worn out clutch parts.