Still R70-16T Forklift: Diesel Engine, Generator, DC Motor - Understanding Computer Connection

Question

Hello
Features a diesel engine, generator and DC motor. I connected without the computer and the forklift is running. It doesn't even twitch with the computer. Therefore, I would like you to tell me what the working principle of this stroller is. What for and what for.

I put pictures of the computer as if someone knew what tiles are from what.

Anonymous · Accepted Answer

R70 from the 90s with a U-200 disc (the one in the second picture). Inducing this alive is not commendable. For diagnostics, an analog tester with a card plugged into the slot from this board is useful, although it can also be diagnosed without it. Diesel, as I see VW. The principle of operation is quite simple, since you have already roused and rides, you have already learned something. Currently, you do not control the current in the rotor circuit, for this I also do not recommend such a solution, it is dangerous. What do you want to know? Description of the operation of all components is already a big compendium.

Anonymous · Accepted Answer

Batteries in series (I have never seen one in parallel), 24V alternator, 12V starter. An equalizer system was used, visible on the last photograph, compensating for voltage differences on batteries resulting from asymmetrical load. Excitation system for both the generator and the motor independent of the weight of the trolley. It would be useful for you to have a workshop book, detailed diagnostic procedures, a repairable but fairly specific system.

Anonymous · Accepted Answer

Starter and lighting from the first side of the ground. 24V necessary to operate the rest. Alternator fit?

elektronikq · Answer

I wanted to rule out the corruption of the generator or DC motor. What is going on. There is no excitation on the generator. There is only + 12V on the excitation motor. And it does not go. I would like to know what it depends on.
The best thing is that the trolley will sometimes catch it and then it will stop and it will stay until the next time. I exclude more electronics here because it probably can not be that once it is good once bad. Some tips, cold February, some wires? Where can the fault lie?

I would like to add that the gas has a 3.8k? regulated resistor, but it is only 2.5 to 3.8k? on the regulation

elektronikq · Answer

Is there an alternator on 24V or not? Batteries connected in series or parallel? Where does 24V come from?

elektronikq · Answer

Well, that's where 24V ... 24V comes from, maybe that's why the problems started. The starter was connected to one battery? Lighting, lamps are on 12V.

elektronikq · Answer

The alternator was just sucking. So the starter and other things we take from 12V. Because there I saw a wire to mass from one mass of the battery.

elektronikq · Answer

We've made a simple relay system and the trolley drives. I have a question. Why when I turn off the engine excitation and the generator's excitation will be turned on, the diesel engine goes out right away. The same as how we will replace + and - on the generator, the diesel engine will not even start.
We gave 12V to the generator's excitation and the nominal one is 24V, but the generator works.
Alternator at 12V.

elektronikq · Answer

I measured the current ... peak function, 160A, 180A once indicated 190A when moving off. Normally when driving about 40A. Rated current of the trolley 150A.
What does the starter relay do? The book talks about delay, but it's just a relay.

Magicontrol · Answer

Hello, I have the opportunity to buy a forklift STILL R70 / 16G and probably has a similar travel problem as you solved. The ride was said to yank first and then stop working completely. How did you solve this problem? Do you have any technical documentation for this? Does it make sense to buy this forklift (the price is very low) or not to go about it at all? Thank you very much in advance for the information.

arci36 · Answer

Is the measuring generator on the road wheel OK?

API___WSG · Answer

Check if burned resistors are visible on the plate to which the motor is connected. If so, then the motor transistors went down. Transistors are difficult to get, currently the only replacement available is BUX20. Burned resistors also need to be replaced (22 Ohm). Unfortunately, burned transistors testify that the motor is already out of order (damaged winding insulation or burnt commutator), if you replace only the transistors without repairing the motor, the problem will recur after a while.

zwinka25 · Answer

Hello,I got a power board for repair and I need to find out what the resistor marked in the picture below is and if there are any replacements for the transistors (BUV18A) or if those from Aliexpress will be good.

faza1111 · Answer

I have a similar one on the table 100 ohm 2%, and I'm interested in what the original transistors in these black heat sinks are. One is 2N6111 and the other?