EM rotating contacts and score motor lubrication

On stepper units, clean the rivet-head contacts with alcohol, polish lightly with crocus cloth, then wipe on a very thin film of pinball lubricant with a fingertip. Oil the score motor only where it has an oil hole (sometimes with a felt pad visible); if there is none, check the manual or the card in the cabinet before lubricating.

Systems

• Electro-mechanical

Related tips

• Oiling a Gottlieb score motor (one point only)
• Replacement switch contacts for EM games
• Never spray contact cleaner or WD-40 in an EM
• Why contact cleaner ruins silver contacts

Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)