Tektronix Type 130, Instruction Manual

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Maintenance — Type 130
AA
4-5
inner surfaces of rotor blades. When wetting the switch
wafer with this contact restorer, spray surfaces until they
appear wet, but not until they drip with excess fluid. Blot
any excess immediately with clean soft cloth.
Detent Ball Replacement
Detent mechanisms of the “non-captive: type have, on
occasion, “dropped the ball”. This usually occurs because
of a dry or poorly lubricated mechanism. The Type F
switch uses a 5/32 inch ball.
Missing detent balls should be replaced by removing the
“C” ring at the front of the bushing. This relieves the
tension on the spring, allowing the ballot be clipped in
place. If you are extremely careful, you can, in many
cases, replace the ball by prying the spring back with a
soldering iron or scriber. Care must be taken or the detent
spring will be bent, lessening the tension required for
normal detent action.
Lubricating Potentiometers
Fig. 4-9. Commercial Potentiometer Lubrication.
Lubricate the pot shaft at the front of the bushing, using
WD-40.