878285 Mercury O-RING

Park the machine on a hard, level surface. Lower the scraper bowl to the ground and engage the parking brake. Chock the wheels in order to prevent the machine from moving.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Effective July 1, 1992 regulations prohibit the venting of any refrigerant into the atmosphere. Refer to Caterpillar publications Service Manuals, SENR3334, SENR5664, and NEDG5065 for the proper procedure, the proper equipment, and the proper tools needed in order to reclaim refrigerant from any Caterpillar equipment.
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.
Reclaim the refrigerant from the cooling system.
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Remove eight bolts (1) and the washers that secure grill (2) to radiator guard (3) . Remove grill (2) from radiator guard (3) . The weight of the grill is 14 kg (30 lb) .
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Loosen retaining nut (4) . Disconnect refrigerant hose (5) from condenser (6) . Remove two bolts (7) and the washers that secure bracket (8) to the radiator guard.
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Loosen retaining nut (9) . Disconnect refrigerant hose (10) from condenser (6) . Remove two bolts (11) and the washers that secure bracket (12) to the radiator guard. Use two people to remove condenser (6) from the radiator guard. The weight of the condenser is approximately 13 kg (28 lb) .Note: Be careful not to damage condenser coil assembly.Installation Procedure
Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.
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Use two people to position condenser (6) to the radiator guard. The weight of the condenser is approximately 13 kg (28 lb). Install two bolts (11) and the washers that secure bracket (12) to the radiator guard. Connect refrigerant hose (10) to condenser (6) . Tighten retaining nut (9) .
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Install two bolts (7) and the washers that secure bracket (8) to the radiator guard. Connect refrigerant hose (5) to condenser (6) . Tighten retaining nut (4) .
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Position grill (2) to radiator guard (3) . The weight of the grill is 14 kg (30 lb). Install eight bolts (1) and the washers that secure grill (2) to radiator guard (3) .
Personal injury or death can result when charging an air conditioning system with a liquid.The compressor will pump the refrigerant back into the charging cylinder with the possibility of rupturing (exploding) the cylinder.Do not operate the engine when charging with a liquid. Never charge liquid or gas through the discharge (high side of the system) with the engine running.Keep all other personnel either away from the machine or where they can be seen when working on the air conditioning system.
Evacuate the air conditioning system and charge the air conditioning system. Refer to Operation and Maintenance, SEBU7143. Refer to Service Manual, SENR5