Negative Diodes
NOTE:
The new diode must be of the type especially designed for replacements. Besides identification marks, spare diodes bear the letter "R" stamped on container shell. Also shell diameter in knurled area is oversize. The seat hole of the damaged diode that was removed must be rebored to a larger diameter to ensure efficient operation of the replacement diode.
- Removal should be performed using a suitable hand arbor press (see illustration).
- A drill press should be used to ream diode seats. Support end frame with suitable fixture (A. 76035). Center seat to be reamed to fixture bushing by inserting guide pin and then locking end frame to fixture.
- Re-bore diode seat using reamer (A. 90340) chucked in drill at about 1000 RPM. Reamer must be oiled continuously with kerosene during operation.
- Install negative diodes using hand arbor press. Diode axis must always coincide with hole axis. Drift (A. 76028) used for installation of diode must apply its pressure exclusively on the container areas marked in illustration. Before pressing, be sure to prevent arbor rotation by securing lead screw in its vertical groove.