d. Maintenance of ignition head.
(1) Servicing. The ignition head should be cleaned and lubricated each time it is disassembled. ([Par 49])
(2) Spring-case assembly. If outer case rotates and inner case does not, and no spring action occurs, spring is broken and spring case should be replaced as a unit. Do not disassemble or repair this part.
(3) Trigger rod and lug. When trigger is pulled all the way, end of trigger rod should extend 1/16 inch beyond lug on forward-facing surface of ignition-head body. If end of trigger rod is worn, replace rod. Lug on the ignition-head body should be approximately 7/32 inch high. If lug is worn or broken, replace ignition head body.
Fig 57. Prying snap ring from ignition head to remove spring case.
Fig 58. Loosening set screws with wrench so ignition head may be lifted off barrel.