TUBE AS 3523977 - Caterpillar

6N3161 12V (Motorola Number 8RD2018)
Polarity is negative ground or insulated.Voltage setting range ... 13.2 to 14.4 V(1) Remove cap to adjust voltage. Turn the adjustment screw clockwise to increase voltage. There are five adjustment positions.Position 1 ... 14.2 to 14.7 VPosition 2 ... 14.1 .2 VPosition 3* ... 13.8 .2 VPosition 4 ... 13.5 .2 VPosition 5 ... 13.2 .2 V*New regulators are adjusted at the factory to Position 3.6N3160 24V (Motorola Number 8RD3019)
Polarity is negative ground or insulated.Voltage setting range ... 26.8 to 29.2 V(1) Remove cap to adjust voltage. Turn the adjustment screw clockwise to increase voltage. There are five adjustment positions.Position 1 ... 29.25 .35 VPosition 2 ... 28.6 .3 VPosition 3* ... 28.0 .3 VPosition 4 ... 27.4 .3 VPosition 5 ... 26.8 .3 V*New regulators are adjusted at the factory to Position 3.