Hello, i am Robby from italy, sorry my english is not good.
I have a D6D SA (165 HP, engine 3306 PC pre-chambers unfortunately!!!!!) 6 gears Fw, 4 Rv, and D5B SA VHP (160 HP,engine 3306 DI) 6 Fw and 5 Rev.
D6 I have to purchase used from 2007 with 11000 hrs today’s 14000 and I have rebuild the motor, gear box, reducer and repainted,
D5 I have purchased new from Brazil and have 13000 hrs I rebuild to much the transmission and bevel (two times), too much power
Both to use to make plowing
The d5 is good (no good the transmission), the d6 I have make too power,3 spacer in the fuel screew, I don’t know how much is the power now,
but the problem is the warm temperature of the water engine when use in 3 th gear under stress in plowing. Have you any suggestion?

Hello Robby,Welcome to ACMOC! do you have the front idler blocks turned up for drawbar work?, it will steer alot better, and save on the back rollers.

Oh, and nice looking tractors!!

cracking pics there Robby, how deep are you ploughing and why?......in our part of the world we can really only manage 6 > 7" (or 15 > 18cms) because of the stoney soils.

Hello and thank you all. Richard, here in my area (Bologna, Emilia Romagna) and the ground isclayey and compact. The depth is 40-45 cm. The ground remains soft and moist.
for Rome / KG: sorry but what do you mean by:
"do you have the front idler blocks drawbars Turned up for work?, it will steer a lot better, and save on the back rollers." Sorry again for my English.

Hi Robby,
welcome to the BB. Nice tractors and plows you have there.
The front track Idler wheels can be mounted in either a high or a low position depending on the type of work the tractor is set up for.
For plowing they would be in the High position.
If you look in the little window on the side of the idler guide plates, where you check the idler oil level by removing the plug.
If the plug is up in the top of the window then the idlers are in the High position. If the plug is down low then the idler is in the Low position.

For your overheating has the tractor pulled that plow in third gear in the same clay soil before without overheating?

If yes, then I would look for the simple things first :-
(1) a blocked air side of the radiator core--grass clippings, leaves and dust can get blown into the fins and stop the air flow to cool the radiator correctly.
If you get a light bulb behind the radiator core and look thru from the other side you should be able to see the light shinning thru the core if it is not blocked.
(2) slipping fan belts.
(3) the rubber sealing strips around the fan cowl may have rotted off, this stops full air flow thru the core as the air leaks out instead of going thru the core.

The core should always be blown out by high flow low pressure air before any water is used as the dust can be turned to mud and when dry it is almost impossible to get out of the fins of the core.

At the Dealer I worked for we had a big pile of clay dirt to test machines on. Most machine owners said that our clay pile was the most power consuming dirt to move they have ever come across. One man said it was because the clay soils get very compacted the more they are worked ? I do not know if this is true but I do know that it did find the weak machines.
Hope these things help as a place to start.
Other people may add more hints soon.
Cheers,
Eddie B.

thanks Eddie, for the informations. I control if the track Idler wheels are mounted in high positions. I hope you understand. The radiator is new, and the engine is rebuild. The overheating of water there's when use in 3 th gear under stress in plowing.
I do not think is normal, the D5 does not behave in this way.
bye and thanks

What are the actual model and serial numbers for those tractors?
Hp ratings seem high, if the fuel rate has been increased you may be near the heat rejection rate capacity for the radiator. Also later D6D's went to folded core radiators....what does your have?

Hello, the arrangement number is 1Y427. The radiator is classic, not folded core.
I in effect saw a dozer D6D with power shift and folded core radiators, direct engine.
Perhaps the D6D SA VHP has folded core radiators. I do not know ........
You can not change my tractor, with a bigger radiator? or adding another front?
or changing the radiator with a folded core radiators? is possible?
thanks

Hi Robby,
forget about folded core unless you want more overheating problems--ALL here in Australia were changed over to modular cores (correct term I think) as the folded units clogged too easliy.
What fuel injection pump do you have--does it look like a normal Cat injection pump or one with a big flat side cover plate.
Did you have the injection pump of during engine repair?
Both these type pumps need to be pin timed to set the correct injection timing.
I always checked the TDC position of the flywheel to be sure it was correct, or else the timing could be retarded and cause overheating.
If I recall correctly these engines run 13.5 Degrees Before Top Dead Center timing advance.
From my Dynomometer test experience these engines are very sensitive to the timing being correct.
From memory ( I may be wrong and stand to be corrected ) these engines were 13.75 Degrees BTDC timing and if they were 0.25 Deg. retarded they were low on power and sluggish.
Also if they were 0.25 Deg. Advanced they were good performers.

Cheers,
Eddie B.