Quote:
Originally Posted by pestobanana
1. The occasional noise from running your gearbox with just your motor and gears is normal. It is due to gear slop, it is normal. You get a bit less of it once you apply thick grease, and it is not a problem once you actually have a load to pull.
2. Confirm that the tappet is actually pressing on sector gear. Assemble the gearbox with the gear set, tappet plate, cylinder head, and nozzle. If the nozzle moves back and forth relatively freely, the tappet is not getting caught on the sector gear.
3. If it actually is getting caught on the sector gear, you can either file the side of the tappet that goes into the channel, or your shimming is incorrect. I'd lean toward the latter.
|
Thanks for the reply!
So I think I've shimmed it properly... but there's always noise when the tappet plate is installed regardless of if there is a load.
The sector gear is still free spinning when the tappet plate is installed, so I'm going to rule out tappet plate pressing down on it being the cause.
The only other thing is that the tappet plate is rubbing up against the gearbox. I tried filing it down by maybe a millimeter but it doesn't seem to alleviate anything. Is friction between the tappet plate and the gearbox normal? It is still free-moving.
I think it's note worthy that there's a chunk of the tappet plate that's missing. There's a 1 mm semicircle on the side that is on the left side, that is, the side that does not engage the sector gear (the side opposite to the flag looking thingy). I think it got cut up from something but I have no idea when/where...
There's just that high pitch whine whenever everything is installed and sounds awful :/