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MAINTENANCE INFORMATION
Regular maintenance is essential to a game's continuing contribution to the operator's earnings.
LUBRICATION
The two main lubrication points of the Eject Hole mechanism are the pivots for the Eject Arm. Note
that the mechanism of the Cellar Kickbig Arm Assembly is somewhat similar to the Eject Hole Device; it
has the same lubrication requirements as the Eject Hole Device. A medium viscosity oil (20W or 30W)
is very satisfactory for these devices.
Because of the functional design (arm-actuated via solenoid plunger operation), the pivot points of the
Left and Right Kickers ("Slingshots") all require lubrication as a regular servicing procedure.
Mechanical
adjustments are simple and somewhat similar to the Eject Hole mechanism.
These
mechanisms should also be checked for proper fit (snugly tight) where they attach to the playfield.
Lubrication to ensure proper operation also applies to the target blades of the 3-Bank and 1-Bank Drop
Targets. MBI Instrument Grease, also known as Drop Target Switch Lubricant, with a Williams' part
number of 20-8886, is a recommended lubricant.
SWITCH CONTACTS
For proper game operation, switch contacts should be free of dust, dirt, contamination, and corrosion.
Blade switch contacts are plated to resist corrosion. Cleaning blade switch contacts requires gentle
closing of the contacts on a clean business card or piece of paper, and then pulling the paper about 2
inches, which should restore .the clean contact surface. Adjust the switch contacts to a 1116-inch gap.
Flipper button switches and the End of Stroke (EOS) switch on the flipper tend to suffer from pitting
caused by the high current in this circuit. Weak or "slow" flipper action is the result of this pitting.
Carefully restore the surface of the flipper switch contact with a very fine contact file; finish the surface
restoration with a contact burnishing tool. This should bring the flipper action back to its usual 'snappy'
action.
CLEANING
Good game action and extended playfield life are the results of regular playfield cleaning. During each
collection stop, the playfield glass should be removed and thoroughly cleaned and the playfield
should be wiped off with a clean, lint-free cloth. The game balls should be cleaned and inspected for
any chips, nicks, or pits. Replace any damaged balls to prevent playfield damage.
Regular, more extensive, playfield cleaning is recommended.
However, avoid excessive use of water
and caustic or abrasive cleaners because they tend to damage the playfield surface. Playfield wax or •
polish may be used sparingly, to prevent a buildup on the playfield surface.
Do not use cleaners
containing petroleum distillates on any playfield plastics because they may dissolve the plastic material
or damage the artwork