Cover and Gasket Replacement
When installing a new cover, make sure that the cover and gasket are perfectly clean and that the gasket is installed correctly. Tighten the screws after installation. If dirt appears inside the regulator body, clean the contacts and other parts of the regulator.
Soldering breaks in electrical connections
Solder with a small amount of neutral flux to prevent overheating of the insulation. Remove excess flux after soldering, as flux residue evaporating from the heat generated by the regulator during operation can contaminate the contacts.
Cleaning contacts
To clean the contacts, remove the armature spring and loosen the nut 6 (rice. 7-10), raise the column 8 of the fixed contact of the 1st stage.
With a flat velvet file, carefully clean the contacts, while removing burnt materials and oxides over the entire surface. The file must be completely dry, washed in pure alcohol, gasoline or better trichlorethylene. The recesses that have arisen on the contacts due to burning must be cleaned with a clean steel pointed pin. Remove the silver filings from the regulator body by blowing it with dry, clean air. Install the armature spring.
By moving the fixed contact bracket of the 1st stage, adjust the gap between the armature and the core to 1.4±0.07 mm, making sure that the contacts touch correctly. By moving the bracket of the fixed contact of the 2nd stage, adjust the distance between the contacts of the 2nd stage to 0.45±0.1 mm, making sure that the contacts are touching correctly. Tighten nut 6.
Replace the gasket and cover, then test the regulator on the stand and adjust if necessary.
Cleaning the voltage regulator
If foreign matter enters the regulator, after cleaning the contacts, before checking and adjusting, carefully flush the regulator with alcohol or pure gasoline (solvent), then dry it (without cover) in an oven at 120°C for two hours. Then check the regulator on the stand and adjust if necessary.