GENERATOR CONTROL UNIT
TYPE 1800-R16 REGULATOR
General Inspection
It is recommended that the generators and regulators be inspected every 30 days or every 500 operating hours, which ever occurs first.
First... Disconnect the parallel connection, by disconnecting the wire that is connected to the P+ terminal on the regulator.
Second... Make certain the opposite unit of a parallel connection is at rest while testing.
Third ...Remove the generator battery fuse.
Fourth... Connect the voltmeter between the regulator side of the fuse clip (B--) and a ground (B+).
Fifth... For a true reading, accelerate and retard the engine several times.
Take a voltage reading each time the engine is running at top speed.
The voltage reading should be from 37.5 to 38.0 volts at full throttle.
Sixth... Check the contacts for burned or pitted spots. If the contacts are spotted, clean with an ALOXITE block 150 or 180 grit. Place the block between the contacts and with a slight thumb pressure on the armature, move the block back and forth slowly until clean.
Seventh . . Blow out all filings.
Eighth... Be sure to reconnect the parallel line after checking.
FOR FURTHER INSTRUCTIONS REFER TO THE
FOLLOWING CHAPTERS:
Characteristics
The Regulator or Control Unit (Figure 3) limits the output of the generator so that the charging rate within the capacity of the generator varies according to the load imposed by the electrical system and the condition of the battery. It consists of the following parts:
1. THE CUTOUT RELAY. This device functions only when the generator voltage is sufficient to charge the battery. Below this predetermined value, the contacts remain open, preventing the battery from discharging into the generator.
2. THE VOLTAGE REGULATOR automatically limits the voltage from rising
. beyond the level for which it is set, thereby keeping the generator from charging at a higher point than is safe for the system.
3. THE LOAD LIMITOR effectively controls the amperage or current output of the generator. As current is consumed, or if the battery is discharged, the load limitor varies the charging rate within the limits of the generator. The armature of the Load Limitor vibrates to introduce a controlling resistance which limits the charging rate of the generator to its designed capacity.
The ampere output of the generator, within the designed limits, is controlled by the load limitor and no attempt should be made to change it by adjusting the cutout or voltage regulator.
4. The resistance Units R6 and R7, Figure 3, are for control in the voltage regulator circuit. The filter unit F-1 prevents arcing between the voltage regulator contacts.