3306B GENERATOR SET ENGINE Caterpillar


Switches

Usage:

Temperature Coolant Switches

140-8416 Switch

Terminal A is normally open below actuation temperature.

Terminal B is common.

Terminal C is normally closed below actuation temperature.

With a temperature increase to 111.5 to 113.5°C (233 to 236°F), terminal A closes and terminal C opens.

With a temperature decrease to 105.5°C (222°F), terminal A opens and terminal C closes.

(1) Tighten switch assembly to a torque of ... 52 ± 8 N·m (38 ± 6 lb ft)

5N8857 Switch

Terminal A is normally open below actuation temperature.

Terminal B is common.

Terminal C is normally closed below actuation temperature.

With a temperature increase to 96.5 to 99.5°C (206 to 211°F), terminal A closes and terminal C opens.

With a temperature decrease to 91°C (196°F), terminal A opens and terminal C closes.

(1) Tighten switch assembly to a torque of ... 52 ± 8 N·m (38 ± 6 lb ft)

8N1693 Switch For Ether Starting Aid

Switch must open between ... 35 to 41°C (95 to 106°F)

Switch must close at a minimum of ... 27°C (81°F)

3N7442 Switch

Switch must open between ... 24 to 29°C (75 to 84°F)

Switch must close at a minimum of ... 18 to 24°C (64 to 75°F)

Oil Pressure Switch

3E6455 Switch

Terminal A is normally open below actuation temperature.

Terminal B is common.

Terminal C is normally closed below actuation temperature.

With pressure increase, terminal B closes and terminal C opens at ... 90 ± 21 kPa (13 ± 3 psi)

With pressure decrease, terminal B opens and terminal C closes at ... 70 ± 21 kPa (10 ± 3 psi)

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