In older generators, the "positive" valves were pressed into a separate aluminum plate (radiator) and the "negative" ones were pressed into cover 1 (see Fig. Generator G-221). For such generators, if one or more "positive" valves are damaged, it is necessary to replace the radiator together with the valves.
1. Damaged "negative" valves pressed into generator cover 1 can be replaced with serviceable ones of the same polarity. To do this, carefully press out the faulty valve on a press (1 - punch A.76027, 2 - support A.76029, 3 - support plate A.76032). Do not knock it out with a hammer, so as not to spoil the hole for the valve and not to damage other serviceable valves pressed into the cover.
2. Press the new valve carefully, without skewing, into the cover using a press (1 – punch A.76027, 2 – "negative" valve, 3 – support A.76013, 4 – generator cover). It is strictly forbidden to press the valve in using hammer blows.
3. The pressing force should act on the valve body as shown in the figure (the arrows indicate the places where the A.76028 punch should act during pressing).
4. The valves are pressed until the flange stops against the generator cover. For valves that have a non-rolled belt near the flange, a gap of 0.1–1 mm is allowed between the valve flange and the cover surface.