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1. 2. 3. 4. 5. Maintenance Guide rods Safety pins Prop Closing springs Fig. 7. Installation of safety pin 5.2-Arc Quencher Removal and Inspection The arc quenchers should be inspected at the regular inspection period. If item 1 is eroded to .125 of an inch from original conture or item 2 is cracked, Fig. 8, the arc quencher should be replaced. 5.2.1-Removal and Replacement Referring to Fig. 8: a. Be sure breaker is open. b. Loosen nuts (4) and remove the two slotted head jack screws. c. Remove two hex head bolts (5) that mount channelshaped retaining bar to side support (6). d. Remove channel-shaped retaining bar. (Continued next page) 15