The Derv Doctor

10/10/2025

Something a little different this week, John Deere and Komatsu forestry equipment.
Software fully recalibrated to give a good specific fuel consumption saving.

31/03/2025

Our MAN TGE 4x4 will be looking for a new home shortly:-

www.autotrader.co.uk/van-details/202503300758528

31/12/2024

The end of another busy year is here again! We wish all our customers a happy new year 🎉

11/12/2024

Different colour green for a change, Deutz 6160 tuned from 128 hp PTO to 165 hp PTO.

21/10/2024

D M mechanical also offer our tuning and turbo kits in Aberdeenshire
https://www.facebook.com/share/p/zoRVRkyqLvaENaxY/

🚜 **Big Nick's Tractor Tour of the UK: Aberdeenshire** 🚜

You thought we were done with Nick Young's wild ride, didn't you? Well, think again, folks! This tractor-loving lunatic is back at it, and he's leaving chaos in his wake.

Good luck keeping track of Nick Young. One minute he’s in Scotland, then he’s in the south of England, now he’s back up in Scotland again! Is there a method in the madness of his route? Maybe, only he knows…

This time, Nick's making a pit stop in Banchory, Aberdeenshire to visit our good friend Darren Morrison of DM Mechanical Services. Darren's the kind of guy who can fix up any tractor, no matter how stubborn. He's practically a magician with an engine!

We're proud to support Darren and other hardworking trade businesses like his. So if you're in the Banchory area and need some tractor TLC, you know where to go.

Stay tuned, because who knows where this tractor tornado will blow through next! 🌪️🚜

29/08/2024

Collection our new Simga 50 PTO dyno this morning

05/08/2024

I'm on holiday until the 12th of August, Frazer is working but there is nobody in the office this week, so please don't post anything to the farm this week. Phone calls and email will be answered but please bare with us, if no answer please send a message or email.

18/04/2024

John Deere 6155R with EGR position errors, EGR codes sorted out. Tuned to 195 hp off boost and 225 hp on boost at the pto. When the EGR is closed this increases the amount of gas that has to travel through the turbine housing, which if the turbo control is not recalibrated correctly it will over speed the turbocharger and lead to failure. This week alone we have seen two turbocharger failures directly connected to franchise tuning companies not recalibrating the VGT control after closing the EGR valve on John Deere engines! The amount of sub standard software that's on the market is unbelievable, don't believe the advertising and marketing nonsense the big franchising companies only want to take people's money they are not interested in the actual job.

29/03/2024

Another day and yet more vehicles with all the error code tables deleted. The market is flooded by franchising clowns. We had two more tractors last week here showing no codes for anything you unplugged

22/03/2024

Yet another example of poor engine software, our friends in Ireland have had this JCB 4220 in today that's been previously tuned. It was extremely poor on fuel. The current software has all the error code table deleted, as you can see in the video you can unplug engine sensors and it doesn't show any faults. This is extremely dangerous as the engine doesn't have any of the inbuilt protection now plus it's pretty much impossible to carry out any diagnostic work! Sadly we see this more and more!

21/03/2024

We have these units back in stock again

We now have genuine Borg Warner turbochargers in stock for:- OE Number DZ103843, RE548370, RE548371, RE543743, SE502446 suitable for John Deere 6105M, 6105R, 6115M, 6115R, 6125M, 6125M, 6125R, 6130D, 6130M, 6140D, 6140M
These are over £2500 plus vat retail from John Deere currently we are doing them for £1600 plus vat.

18/03/2024

A nice feature about our services in farmers weekly