SHIM 3026335 - Caterpillar

Coolant Temperature Switch/Sender
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Coolant Temperature Switch/SenderThe Coolant Temperature Switch/Sender is the combination of a switch and a sender in a single device. The switch in the device is used as an input to the machine monitor.During normal operation, the coolant temperature switch is open. The switch closes to ground when the engine coolant temperature exceeds the trip point. The closed switch provides a path to ground through the machine monitor for only the action alarm. Also at this time, the sender should cause the engine coolant temperature gauge to be in the red zone. The action alarm and the engine coolant temperature gauge notifies the operator that the engine coolant temperature is high.When the switch is off the machine and on the bench, the switch is in the "normally open" position.The specifications that follow are for the Switch:
Actuation temperature for the switch is 108.0° 3.0°C (226.0° 5.4°F).
Deactuation temperature for the switch is a minimum of 100.0° C (212.0° F).The specifications that follow are for the Sender:
Resistance of the sender at 50° C (122° F) is 755 to 943 Ohms.
Resistance of the sender at 82.2° C (180° F) is 124 to 154 Ohms.Engine Oil Pressure Switch
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Engine Oil Pressure SwitchDuring normal operation, the engine oil pressure switch is open. The switch closes to ground when the engine oil pressure is less than the trip point. The closed switch provides a path to ground through the machine monitor only for the action alarm. Also at this time, the sender should cause the engine oil pressure gauge to be in the red zone.The action alarm and the engine oil pressure gauge notifies the operator that the hydraulic oil temperature is high.When the switch is off the machine and on the bench, the switch is in the "normally closed" position.Actuation pressure is a maximum of 80.0 kPa (12.0 psi).Deactuation pressure is 38.0 10.0 kPa (6.0 1.5 psi).Steering Filter Bypass Flow Switch
During normal operation, the steering filter bypass flow switch is open. The switch closes to ground when the system oil flow goes around the combined steering/hydraulic filter (bypasses). The closed switch provides a path to ground for the steering filter bypass flow indicator and the action alarm.The illumination of the steering filter bypass flow indicator and the sounding of the action alarm notifies the operator that the oil is bypassing the combined steering/hydraulic filter. When the switch is off the machine and on the bench, the switch is in the "normally open" position.Parking Brake Switch For "C" and "D" Series
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Parking brake switch for the Challenger Agricultural Tractors ("C" and "D" Series)During normal operation, when the parking brake is not applied the parking brake switch is open. The switch closes to ground when the parking