Draco

Big thanks to all of you. Yesterday the new box arrived. I placed the same (!) batteries from the old one in the new box and - wow - it works fine.

i opened the box. There are the contact plates only and a small board with the green LED, the slide switch and a small SMD component that I can not identify. Thats it. I will order a new box and hope you are right

Unfortunately i have no other battery box at the moment for testing. i think i will try to open the box and look for something wrong before i order a new one. It´s strange that somesthing got broken into the cupboard over the month...

Dear all, after lots of month today i wanted to play with my motorized unimog outdoor. I put 6x freshly charged eneloop batteries into it and wanted to get started. But after 1 meter of driving the engines slow down and stopped. It looked as if the batteries were empty. Okay, may be something was wrong with this set of eneloops. I change them to anoter fresh set... but the result: the same problem! In december of 2014 i bought the unimog together with all the power functions. In february i stored the model (without batteries) in the cubboard. everything worked wonderfully. Now today nothing is working anymore. I have tried three different sets of batteries, all with the same result. I measured a set of battieres, each cell has over 1.4 volts. The voltage breaks down immediately when starting engines. I have different types of motors connected directly to the battery box. Small motors are running a little longer, the large L-motor stops after a few seconds. That's why I do not think that an engine is broken. But can the battery box go broke? Is there any way at all electronics in it other than a switch? I am confused and my daughter is sad that the Unimog could not drive on the lawn today. I hope someone can give me a tip.

a video of my modified to power functions Unimog. After a lot of tests i decided to usw a servo motor into the front axle for steering. The motor is invisible and has enormous power. Furthermore, the steer automatically returns to zero position. In order for the suspension has no limitations, a few modifications to the vehicle frame had to be made. Also, I have improved the coupling of the springs at the top and eliminates the bending. The shocks are no longer bending. I used a xl motor for drive in addition to lot of instructions in this thread. Together with the reduction in all 4 portal axles, the Unimog has much torque. In the front area of the vehicle frame I have installed an M engine for the front PTO. This motor is connected to an IR receiver together with the standard m-motor for pneumatics/rear-pto. If the yellow switch is set up for "pto" i can remote control the rear PTO too. The snow shovel in the video only demonstrates the remote control function of the front PTO (i have not enough parts to build a nice shovel.... will be made in the future may be....) Here is the youtube link: http://youtu.be/i1eAXEolh60

Is there any way to control pneumatic valves with power functions? Has anyone ever made this? I just upgrade to full RC when pneumatic continues to be used. I love pneumatics in techic models. @thenextlegodesigner: any informations regarding your 2 speed gearbox? How does ist switch the gears? My unimog has enough torque at all wheels because of reduced gears in all 4 axles. But he has no speed. P.S.: Happy Christmas

Ready for action XL Motor for drive and servo for steering are included. For perfect fitting the motors I am low on correct parts. But with some remnants from the 90s it workes too. http://www.planetdraco.de/temp/IMG_8623.jpg http://www.planetdraco.de/temp/IMG_8624.jpg

Thanks for the infos regarding the air tank. What type of order-number does it have? aha? after reading this thread i thought that it is the strength of the servo, that he has a lot of power for steering without any reduced gearing?!

Hard to believe, I have read through the ENTIRE thread. Cost "only" 5-6 hours, but it is very interesting. Neverless i have some questions. First of all, what does a air tank exactly do? what kind of improvement? I imagine so far that in every situation are enough air reserves. so large pneumatic cylinders can move quickly and do not have to wait for air pressure? The second one is about rc steering. In this thread are discussed two different ways of building it. The first one is realized with an M-motor into the cabin. The second solution is realized with a servo motor in the front axle. Both results should be great. Which version is it really the best solution in terms of a reliable and stable steering?

Sorry, I have formulated my question wrong. My plan is to remote control the Unimog. I am looking for instructions on how to change the unimog including the special parts which are required cause they are not part of the original set.

Good evening together, my name is Toby (31) from germany, i am a passionate lego fan since the age of 7 years. a very long time i collected lego 9V railroad trains and still have some old classics on my own. In 1992 i got a gift, it was a lego technic truck (set 8868). Roundabout 5-7 years ago i sold that truck on ebay. No idea why, but recently has made me re-addicted for Lego Technic. I have to say that today's models have nothing to do with the "old" models from the 90s. Motors, batteries, air tanks, wow ... It took not long so I decided yesterday to purchase a Unimog. Quickly, I have become aware of this forum and found this thread. With all respect - it is damn long! I'll spend the next few days to learn about possibilities of this model. What I have not found so far: There are already a number of models that can be controlled by remote control (steering and drive) Is there a list of parts to realize this? I have no Lego Technic parts more in my possession, so I have to order precisely items. Thanks for help in advance