One flipper is slow and weak although the sleeve is new, nothing binds and the wiring is intact.

Sluggish flipper with nothing binding: EOS switch not closed at rest

Cause: The end-of-stroke switch was not making contact at rest, so only the weak hold winding was powering the flipper.

Checks

• With power off, check the EOS contacts are firmly closed at rest.
• Briefly jumper across the EOS: if the flipper becomes strong, the switch is the problem.
• If not, check the coil's power winding for a break at the lug.

Fix

• Clean and file the EOS contacts (they are tungsten) and adjust the gap, or replace the switch.

Systems

• Williams System 11B

Games

• Police Force

Related tips

• Weak flippers from pitted EOS switches
• Every System 11 flipper has an EOS switch and coil diodes
• Weak flipper: rectifier or worn parts
• Weak flipper: dirty end-of-stroke switch
• Contact files only on flipper switches
• One flipper does not work at all
• Weak flipper: dirty cabinet button
• Flipper dead on a System 11 game

Source: Pinball Repair help group!! (Facebook group)