Wagon Tipplers

Well it seems that the machine is not really properly aligned somewhere. Maybe you have a bearing that is seizing. Maybe the axis of rotation of the hinges, circular bearings or joints are out of alignment. A wagon tippler is a massive machine with many bearing points. Have you looked for wear marks anywhere else other than just this gearbox?

Sounds like the gearbox is not the problem, but only a symptom of the problem. As stated, look at other aspects of the system. I would wager something else is causing increased stresses inside the gearbox, causing it to be damaged. Don't replace the new gearbox until you verify all other aspects of the system are in order.

Please get checked the following :

- Decouple the motor / GB to ensure that the motors are rotating in the correct direction . ( Presume the tippler has two motors )

- If the motors are slip ring induction motors , get checked that the rotor resistance is has equal steps while the drive is speeding up.

- If the GB failure noticed is only in a particular GB , I suspect that the drive unit is being pulled by the tippler and not rotating of its own . The directional check would reveal this aspect.

- Certainly checking the drive unit alignment is a must.

can you post photos ?

I like Voltamps answer. We are presuming the cars are the same size and height, and they are not full of rain water. Decoupling the drives and comparing rotation and speed is a very good idea. Check amps at the same time.

When you put in the new gear box did the amp draw increase, decrease or remain the same?

After replacement of gear box, on empty running, ampers drawn by motor were less then earlier but on load there was only marginal diffrence and as the wear happened, current draw became same as earlier.