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end of the blade). Otherwise the switch blades tend to fan
out.
SWITCHBLADE
GAPS. Generally switchblades are ad-
justed for a 1/16-inch gap between contacts in the open
position. In the closed position, switchblades are adjusted
for O.010-inch over-travel or wipe .
SWITCH ASSEMBLY MAINTENANCE
After successful completion of Test Mode diagnostics, set
the game for play. Exercise each rollover, thumper-bumper,
Slingshot, target and rebound switch with a game ball.
Check each switch on the playfield for proper operation.
When operation of any switch results in intermittent or no
response, clean the switch contacts.
DON'T FILE THOSE CONTACTSI
Switch contacts should be free of dust, dirt and corrosion.
Plating helps switch contacts, (except flipper button switch
assemblies) resist corrosion. Filing or burnishing contacts
breaks the finish and encourages corrosion. Effective con-
tact cleaning requires gentler treatmentl
Gently close the
contacts on a clean business card or piece of paper. Wipe
the contacts until they're clean. If necessary, regap the con-
tacts to 1/16 inch.
CLEANING FLIPPER BUTTON SWITCH
CONTACTS
Remove the tarnish from the switch contacts with a contact
file. Then smooth your work with a burnishing tool. Severe-
ly pitted contacts may cause game malfunctions. Of course
then you should replace them. Otherwise you can clean
them up and use them until they fail.
DROP TARGET LUBRICATION
Lubricating drop target components is part of routine main-
tenance. Lubrication reduces friction and wear. Bally recom-
mends the following lubricants ...
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