Rock-afire Mac Valve Maintenance

An official procedure for cylinder rebuilding is documented in the ShowBiz Pizza Place Operations Manual from 1981.


 * 1) Remove snap ring or spiral ring from top of spool
 * 2) Remove plastic cap and spacer
 * 3) Carefully remove the spring and spool trying not to damage or scratch up the inside metal
 * 4) Inspect the spool to make sure there is no dirt or debris in the mac valve casing or spool
 * 5) Remove and replace the 2 O-Rings on either side
 * 6) Clean the spool and casing of old grease with water and soap
 * 7) Lubricate the spool and casing with white lithium grease
 * 8) put the spool in the casing being sure the hallow end is facing up
 * 9) place spring into the hole at the top making sure it goes in strait and there's no obstructions
 * 10) place small white spacer onto spring making sure it is strait
 * 11) place white cap on top of white spacer being sure the groove lines up with spacer
 * 12) push down on cap and put the snap or spiral ring on making sure it went to the locking groove