Flipper rebuild steps 14-15: tighten pawl and set the EOS

Steps

• With the bat positioned, tighten the pawl clamp bolt very tight and remove the spacer tool and toothpick.
• Pre-Fliptronics: file the EOS contacts until no pitting remains and set the normally closed switch to open about 1/8 inch at full stroke. A switch that stays closed burns the coil; a dirty one makes the flipper weak.
• Fliptronics: clean the contacts with alcohol on a rag or by drawing a business card through them, and set the normally open switch to close near the end of travel.
• Make sure the EOS blade doesn't hang on the pawl at full stroke.
• Power up in test mode with the coin door closed, work the flippers and recheck the EOS gap.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Flipper rebuild step 2-4: pawl off, check bracket and rubber stop
• Flipper rebuild step 6: pawl, plunger, link and bushing
• Flipper rebuild step 7: renew the pawl's heat shrink
• Flipper rebuild step 1: remove and check the coil stop
• Flipper rebuild step 5: replace the nylon playfield bushings
• Flipper rebuild steps 10-12: end play and alignment
• Flipper rebuild steps 8-9: correct coil, new sleeve, reassemble
• Checking flipper buttons and EOS switches in switch test

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)