KIT-SEAL 1989433 - Caterpillar

Installation Procedure
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Install new O-ring seal (3) on the pressure switch.
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Install pressure switch (2) .
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Connect harness assembly (1) to the pressure switch.
Personal injury can result from contact with refrigerant.Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.Personal injury or death can result from inhaling refrigerant through a lit cigarette.Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.
Evacuate the air conditioning system.Reference: Evacuate the system. Refer to Testing and Adjusting, "Refrigerant System - Evacuate" for the correct procedure.
Charge the air conditioning system. The correct charge is 1.1 kg (2.42 lb).Reference: Refer to Testing and Adjusting, "Refrigerant System - Charge" for the correct procedure.
Check the entire air conditioning system for leaks.Note: Use a 4C-2964 Electronic Leak Detector to check for leaks.End By: Install the storage box. Refer to Disassembly and Assembly, "Storage Box and Covers (Cab) - Remove and Install".