New JD672G Grader

Nige · Nov 20, 2019

Amazing.........
And there was me with the impression that only Cat had customers do product development/snagging/QC work for them in the field..?

DB2 · Nov 20, 2019

We have a new to us 2016 770G (500 hours) and the paint quality is awful. Peeling everywhere. Not too many issues otherwise other than one of the batteries shifting and wearing a hole in the case. Hold down must have never been tightened properly.

ovrszd · Nov 20, 2019

Nige said:
Amazing.........
And there was me with the impression that only Cat had customers do product development/snagging/QC work for them in the field..?

For several years I have bragged that JD doesn't have the R&D issues that Cat does. No longer will I say that. JD pushed this machine out knowing that the JD link did not work because they hadn't written the correct program yet. Unexcusable.

ovrszd · Nov 20, 2019

DB2 said:
We have a new to us 2016 770G (500 hours) and the paint quality is awful. Peeling everywhere. Not too many issues otherwise other than one of the batteries shifting and wearing a hole in the case. Hold down must have never been tightened properly.

Our previous machine was a 2011 770G. It was flawless. I think I mentioned this earlier. Only time JD service saw that machine was when it was 8 years old to do an appraisel for trade-in. Our dealer had it sold the day we traded it.... the paint still looked new.

hvy 1ton · Nov 20, 2019

ovrszd said:
Most disappointing part of this to me is that the dealership didn't protect us from all this. They loaded the machine on the trailer for delivery to us with the Active Code light on. They checked all the blocks on their "Pre Delivery Inspection" checklist saying everything was "Okay" including no leaks, JD working, no Active Codes...…

Case Ag dealer gave me a brand new combine that "passed" PDI. It was hauled all the way to SW OK before I found the computer screaming about no spreader speed 5 seconds after engaging the separator. Took half a day of tracing wires and checking deutsch connectors before I found an incorrectly installed pin in a 4 pin connector. While I was crawling around I found loose intake piping between the air filter and the intake manifold.

ovrszd · Nov 22, 2019

DB2 said:
We have a new to us 2016 770G (500 hours) and the paint quality is awful. Peeling everywhere. Not too many issues otherwise other than one of the batteries shifting and wearing a hole in the case. Hold down must have never been tightened properly.

Is it a DEF machine? If so, how much DEF does it consume?

We started out at 5%. I'm down to a bit less than 3% now.

DB2 · Nov 22, 2019

No. Because ours is sourced in Canada all the smoke goes straight out the stack. That being said it could never be exported to the States. Fuel consumption is comparable to our Volvo’s with DPF and DEF.
I’ll post some pictures of the areas where the paint is sketchy.

ovrszd · Nov 22, 2019

DB2 said:
No. Because ours is sourced in Canada all the smoke goes straight out the stack. That being said it could never be exported to the States. Fuel consumption is comparable to our Volvo’s with DPF and DEF.
I’ll post some pictures of the areas where the paint is sketchy.

Wish we could have avoided DEF.

Yeah, I'd like to see your pics!!! Thanks!!!

ovrszd · Nov 27, 2019

My Son and I were talking about the reverse light situation today. I asked the Tech if he had saw this problem before? He said yeah. I asked if the other problem machine used LED lights? He said yeah.

I'm wondering if the problem is because of the slow "light" time of LEDs plus the low amp draw? Maybe the computer diags as it should and detects an abnormally low draw so throws the code?

He suggested adding a Resistor between the hot side and ground side of one of the lights. This might add draw to the circuit and trick the computer into thinking the lights are working and prevent a code??

This is done commonly with cars/trucks that have had the lights replaced with LEDs. He said the newest vehicles actually have a computer setting that can be changed if LEDs are introduced to eliminate the need for the resistor.

Next week I'll call the Tech and visit with him about this. I'll post my findings.

Fatgraderman · Dec 2, 2019

ovrszd said:
Wish we could have avoided DEF.

Yeah, I'd like to see your pics!!! Thanks!!!

They delayed it in some unique cases in off highway equipment. I’m not sure how they determined which could be delayed and which couldn’t. It was a different piece of equipment excluded with each manufacturer. Last couple years, we’ve had it across the board too.

ovrszd · Dec 2, 2019

In my studies regarding DEF I was initially concerned about a product that freezes. Thru research I learned that the machine will run without access to DEF for a long enough period of time that the tank heater can thaw it out and then pressurize the DEF system.

I struggled with this because I originally thought the DEF tank had to be heated non-stop to prevent freeze up. Would deplete batteries very quickly when parked for days at a time in freezing conditions.

Fatgraderman · Dec 2, 2019

ovrszd said:
In my studies regarding DEF I was initially concerned about a product that freezes. Thru research I learned that the machine will run without access to DEF for a long enough period of time that the tank heater can thaw it out and then pressurize the DEF system.

I struggled with this because I originally thought the DEF tank had to be heated non-stop to prevent freeze up. Would deplete batteries very quickly when parked for days at a time in freezing conditions.

Might be why those things have 2 alternators. I knew the pickups worked something like that. People complained that they weren’t charging but the alternators were hot. They were putting out all they could to thaw the tank out. I’d like to know what they are doing in Germany. I’ve been told they did away with DEF/ UREA on vehicles years ago? What are they doing to meet emissions?

ovrszd · Dec 3, 2019

Good question.

My gravest concern is owning a DEF machine when the "next greatest thing" is added eliminating DEF on new machines. Price of a used DEF machine will nose dive......

ovrszd · Dec 3, 2019

I tried the resistor on the reverse lights today. I only wired a resistor on one reverse light. The machine runs separate circuits for the two lights. When they don't work the fault code is different for each side.

The side with the resistor wouldn't light up the LED light. Not even a little bit. As if the resistor "swallowed" all the power leaving nothing for the light.

I messed with the shifter for a few minutes in this condition until it coded. It only coded on the side with the resistor. Neither reverse light worked once it set off the code...…

Tomorrow I'm going to wire up a couple incandescent lights and splice them into the circuit on each side. Theory being add load. Then mess with it and see if I can make it code.

ovrszd · Dec 18, 2019

I tried adding load to the backup light circuit. Caused the lights to not work at all. Didn't "code", they just wouldn't light.

JD Tech came Monday and replaced the backup lights per John Deere's guidance. Today I went to the Grader shed to check out the results.

Powered up the machine without starting the engine. Shifter was in "F" neutral. Toggle to "R". No code. Toggled back to "F". Selected 3rd gear. Toggled to "R". Code light came on, no backup lights.

Called the Tech and let him a phone message with the results of my test.

So now I'm amused to think what John Deere will throw at the machine now.

Stupid uneducated operator me thinks it's a simple Algorithm in the Computer. The LED lights hesitate a micro second before coming on. I think the computer runs a check test looking for load to the backup light circuit when the shifter is toggled to "R". It runs this diag before the lights come on. Trips code and shuts off the backup light circuits......

mg2361 · Dec 19, 2019

I'm curious (unless I missed it in the text) what specific code are you getting for the reverse lights?

ovrszd · Dec 19, 2019

mg2361 said:
I'm curious (unless I missed it in the text) what specific code are you getting for the reverse lights?

TCU 516773.06 TRANSMISSION RIGHT REV LAMP CIRCUIT FAULT

TCU 516770.06 TRANSMISSION LEFT REV LAMP CIRCUIT FAULT

Always get both codes. After coding neither rev light comes on. Won't reset and turn off code until the machine is shut down and restarted.

Thanks for any input you might have.

mg2361 · Dec 20, 2019

ovrszd said:
TCU 516773.06 TRANSMISSION RIGHT REV LAMP CIRCUIT FAULT

TCU 516770.06 TRANSMISSION LEFT REV LAMP CIRCUIT FAULT

.06 identifiers are for over-current conditions (short to ground). It would be quite rare to have that on both lights at the same time. The backup lights do not share a common power wire.

Cat 140M AWD · Dec 20, 2019

In my opinion why doesn’t Deere just put them on a switch like they used to really hated when they did away with that switch and made them only come on in reverse they must not think anyone works after dark.

ovrszd · Dec 20, 2019

Yeah, I remember when they changed. I was a bit disappointed as well. I usually switched mine on and left them on. Later Deere improved their light packages a LOT. Now the backup lights aren't as necessary. This machine, as well as the previous two, have four lights on the cab pointing rearward. They do a very good job of lighting the area behind the machine. Backup lights are only effective if the work lights are not turned on.

If you look closely at the cab roof you can see one on the left side, three on the right side.

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