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Old 04-10-2015 | 03:14 PM
  #9  
Ex_Pat_Tanker
 
Joined: Mar 2008
Posts: 2,147
Received 39 Likes on 31 Posts
From: Peterborough, UNITED KINGDOM
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Originally Posted by Tanker 10
Thank you guys for all of the help. I'm happy to report all is well and working. Here is what I found. On the large black gear for the recoil there is a large brass nut right in the center. When I activated the cannon, the carriage that the barrel attaches to starts to go backwards right, as the carriage moved backwards, it was getting hung up on that large nut. I tried to raise the gear so it was level with the top of the nut but couldn't. So I ground down the top of the nut so if was flat/even with the top of the gear. Prior to this I removed the recoil motor and found it was working when I hooked a battery and alligator clips to it. Also, having the motor out allowed me to manually slide the carriage and barrel reward. Thats how I saw it was getting hung up on the nut.
That does concern me a little with Tamiya's quality control - that brass 'nut' (I think it's actually a shoulder bolt?) is supposed to clear the recoil slide Sounds like my recent problem with the slide slot not being formed properly? (bad stamping?)

Just for science (and great justice!) is the slide peice bent and hanging down, or is the brass head sticking up too far? Might help Tamiya determine which part is actually at fault...
(I suspect the arm to be honest?)