G342 ENGINE Caterpillar


Alternators

Usage:

4N3986 24V (Delco-Remy Number 1117734)

Rotation can be either direction.

Polarity: negative, positive or insulated.

Circuit ... B

Output at 26V and 2600 rpm (cold) ... 46 A

Output at 26V and 6500 rpm (cold) ... 60 A

Rated output, hot ... 60 A

Field current at 24V and 80°F (27°C) ... 2.2 to 2.7 A

Voltage regulator:

Voltage setting range ... 26 to 30 V

Adjust voltage setting to ... 28 V

then increase speed to get maximum output ... 60 A

(1) Torque for nut holding pulley ... 75 ± 5 lb. ft.(100 ± 7 N·m)

(2) Torque for output terminal ... 55 to 75 lb. in.(6.3 to 8.5 N·m)

NOTE: Adjust voltage with 4-position cap (3): high; med. high-3; med. low-2; and low.

2N6398 24V (Motorola Number 8MH3005F)

Rotation can be either direction.

Polarity is negative ground.

Output at 28V and 1800 rpm ... 21.5A

Output at 28V and 2500 rpm ... 31A

Rated output, hot ... 31.2A

Field current at 24V and 80°F (27°C) ... MAX. 3.0A

(1) Torque for nut that holds the pulley ... 40 to 50 lb. ft.(53 to 67 N·m)

(2) Tension for brush spring ... 6 to 8 oz.(1.7 to 2.2 N)

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