2 replies to this topic

[alex-95]

My Idler gear has been rattling recently, so I’ve taken the engine out to investigate. I’ve found the gearbox casing and transfer housing has worn on the faces the shims sit against. ( it’s not the first time I’ve had this problem, 1st time the gearbox was like it as I had bought it see this thread. https://www.theminif...ear-and-casing/). It’s a different G/box casing and transfer casing to the previous issue. It’s worn on the bottom of the face on both cases. I set the clearance correctly, it hasn’t done loads of miles maybe 6k. What can cause this problem other than the casings being misaligned? I noticed a bit of ‘slop’ between the mesh of the idler gear and 1st motion gear, but with the idler only in one bearing it’s hard to tell exactly how much. ‘slop/backlash’ there is between them.

I’m going to machine the casings flat again but don’t want it to happen again.

[ACDodd]

You won’t stop it. Reduce the torque going through them.

Secondly grab the input gear on the side of the gearbox rapidly and sharply turn it to and fro. If you hear a clatter it’s because you have too much backlash in the main gearset.

Ac

[Aridgerunner]

With any luck I'll be assembling my engine sometime next week and then attaching the gear box. My question is, would it be a good idea to put some type adhesive on the case side of the thrust washers? That would serve to stop them from spinning in the case faces.