6.3 - Cannon Maintenance

On the cannons there is only one item that typically wears out and that is the ball valve spring.  If your ball valve begins sticking open it is most likely time for a spring. 

1. Go to an ACE hardware store and find their Century spring display.  What you are looking for is a 7/32 diameter spring with a .022 wire that is 1" long.
   
2. Next empty the cannon and ensure there is no ammo left in the gun.
   
3. Remove the MPA-7 actuator and pressurize the accumulator.  Pull the ball valve shut if you necessary to fill the cannon.  This will lock the ball valve in place for the next step.
   
4. Remove the screw and washer from the end of the ball valve rod and replace the old spring with your new spring.
   
5. Replace the MPA-7 and test fire the cannon.  Be careful where you aim just in case you missed step 2.
   

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