The Norden Bomb Sight manual

B. Reassembly 1. Replace bearings 2. Place gyro in cardan. 3. Insert gudgeons. CAUTION: When replacing the gudgeon pins, align the bearing with the gud- geon by lifting and holding the gyro in place. The gudgeon should work freely. If one binds, remove and check for dirt and burrs. 4. Replace center gudgeon locking screw on locked bearing side. The locked gudgeon bearing on the stabilizer is next to the isolated sector. Always replace center gudgeon locking screw on locked bearing side first; otherwise the tension of the stabilizer brush on the isolated sector will be incorrect. 5. Insert four (4) gudgeon cap screws and tighten evenly. 6. Replace stabilizer brush, i. e. isolated sec- tor contact brush. 7. Replace bails. 8. Connect flexible leads.

FIG. 20