After many requests for instructions for the PF Backhoe loader I built 1,5 year ago, I decided to rebuild the model, improve it and make building instructions. It has been my most complex Lego-project so far.

Technically, it’s very similar to the first version. That means there are 8 motors for 9 functions:

• Driving & steering
• Outriggers
• Frontloader & bucket
• Backhoe, dipper & bucket
• Backhoe rotation
  

Technical differences with the first version are:

• Front bucket now has the big LA’s instead of the mini LA’s
• Dipper is 1 stud shorter
• More compact design
• Speed controll for driving
  

Other improvents are esthetical:

• It now has a seat and steering wheel inside
• Panels in the front section
• Fenders for the front wheels
• Rear-fenders with round curve
• Roof with curved sides
  

I’m very happy with the end-result. The new version looks nicer and all the functions work properly.

Instructions

The main goal of this model was to make building instructions. It took a long time to make them, but they’re finally ready. They come as 254-page PDF-file, including parts list. You can buy them for € 10. The instructions are available at www.jurgenstechniccorner.com
You can see the online parts-list at rebrickable.com and as image. Or you can send me an email.

All I can say is Wow thanks!

Thanks for making your Building Instructions available! Blakbird posted several nice renderings, and the animations below, on his Brickshelf gallery. Jurgen posted these Tutorials on how to operate it on this Brickshelf gallery:

Edited June 17, 201212 yr by DLuders

Great backhoe loader.A backhoe is something i would love to try to build myself.

Edited June 17, 201212 yr by Alasdair Ryan

Wholly crap jurgen! Excellent job! The arms are robust, and somehow, you managed to make it all motorized! Insane!

Excellent work with the instructions and build design. Outstanding build as usual .

tim

This backhoe is amazing! So much complex systems.

Wholly crap jurgen! Excellent job!

I concur! Another build project added to the high priority list; can't wait!

Normally not a fan of LAs over Pneumatics but this looks really nice and the idea of complete remote control is very appealing. very nice model

Excellent work jurgen!

Congratulation. Great job.

Beautiful MOC with everything it needs. The only thing I do not understand is that you wrote the backhoe can turn 360 degrees. Shouldn't it be 180?

Yes it can turn 180°, he simply made an error writting his review. Only hydrema backhoe have an arm able to rotate roughly 270° (from backhoe loader I know )!

Btw, great MOC ! It looks beautiful and there is a real improvment from first version. Keep the great work ;-).

Edited June 25, 201212 yr by GuiliuG

Beautiful MOC with everything it needs. The only thing I do not understand is that you wrote the backhoe can turn 360 degrees. Shouldn't it be 180?

Yes, that's an error in the video Of course it has toe be 180 instead of 360.

Nice looking model!

Can you post some video/images that show range of motion for the backhoe arm and the loader? How low can the backhoe arm go? Is it a struggle to lift the backhoe arm with the M motor and a single LA at the lowest position?

Also, are you relying on the internal clutch of the LA at end points?

Real machines can push itself very high in the air with loading and backhoe arms at the downward extreme position. I suspect you won't be able to do it here due to the weight of the model.

With LA's it's usually a compromise between break out force and range of motion. I like your orange excavator because it's one of the few that has good range of motion.

The motion range of the backhoe isn't as great as with the real machine, due to a single LA with only an M-motor. I'd love to test the new L-motors in this one.

It's not possible to lift the model with the backhoe, the model is way too heavy (way over 2 kg). But because it has enough gear reduction, the M-motor can completely lift the backhoe, even when it's fully stretched.

The performance of the Zorex-boom is quite a bit better, but this is the best I could do in this design, which is much more complex than the excavator.

still a very impressive model with 9 functions from 8 channels.

Another thing I am wondering is if the drive train can handle the model going over a small obstacle. The gears will grind if not well braced.

It would be nice if you can post pictures showing range of motion. I am sort of sitting on the fence about getting the insructions. That will really give me an idea what the model is capable of doing.

Over the holidays I finally finished building this masterpiece.

It is huge! Especially compared to 8069 and the new 42004:

The build was really fun and everything works as designed (I assume...).

The only difficult part was tide up all the wires in which I definitely did not succeed...

Small - Medium - Extra Large

For everybody that owns 8043/8069/8265 and loves big yellow machinery I strongly suggest building this beauty!

Edited January 2, 201312 yr by Theo van Vroenhoven

That thing is Huge and brilliantly well designed

Wow...I don't know how I missed this! Fantastic backhoe! I amazed at how many functions you were able to fit in the chassis. Really great creation!

I love all the renderings as well. I wish I had those skills.

I seen your real backhoe a the Lowlug meeting in Rotterdam and whas and still is amazing how complex this backhoe is and works, also many thanks that you take the time to make instrucions for it

8043/8069/8265 can it be built from these 3 sets alone?

It's very nice, is it hard to build? Any videos of it working?

Edited January 2, 201312 yr by davidmull

8043/8069/8265 can it be built from these 3 sets alone?

It's very nice, is it hard to build? Any videos of it working?

Those sets cover about 75%

See http://rebrickable.com/mocs/jurgen/fully-pf-backhoe-loader to see what else you need

Instructions are very clear so the build it not very difficult.

See http://www.jurgenstechniccorner.com/backhoev2.html for more info and a video.

Mmm only 75% so that leaves a lot of parts to get :(