Arrow Enfield Airfield? Gearbox problem

[alanbrown]

Finally stripped the gearbox down today to try and find out where 4th gear had gone. Seems to be a selector problem, see photo. The engaging surface of the fork has about 0.010” wear

This didn’t seem enough to prevent 4th engaging, so I looked further. The selector cam spindle was loose in the cover, because it had not been tightened fully. Although the lock washer had been pushed over, the slack but was allowing the whole selector drum to move another 0.075. This is the cause of poor selection. I will renew the selector fork( can you buy the fork, looks like I can only buy the assembled shaft. I will also tighten the nut!
Hope this helps anyone with similar problems

[AndyEames]

Hi Alan. If you don't get any joy, I'm sure we will have a spare one somewhere. Check the pins that run in the cam groove also. They tend to wear flats on the sides.We make ours out of silver steel.
Andy