19801 2 Mariner COVER, Thermostat

Note: Cleanliness is an important factor. Before the disassembly procedure, clean the exterior of the component thoroughly to help to prevent dirt from entering the internal mechanism.Note: Put identification marks on all lines, on all hoses, on all harness assemblies, and on all tubes for installation purposes. Plug all lines, hoses, and tubes to help prevent fluid loss and to help keep contaminants from entering the system.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand.Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Drain the coolant into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
Drain the hydraulic system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change".
Lower the rear power train guard. Refer to Disassembly and Assembly, "Power Train Guard - Remove and Install".
Illustration 1 g03893691
Disconnect hoses (1), (2), (3) and (4).
Illustration 2 g03893731
Disconnect hose assembly (6) and hoses (5) and (7).
Illustration 3 g03893743
Disconnect harness assembly (8) and hose assemblies (9) and (10).
Illustration 4 g03893761
Remove bolt (11) and place hose and clamp assembly out of the way.
Illustration 5 g03893882
Remove bolts (12) and bolts (13).
Attach a suitable lifting device to radiator guard and support, the aftercooler, the hydraulic oil cooler, and radiator . The weight of radiator guard and support, aftercooler, hydraulic oil cooler, and radiator is approximately 454 kg (1000 lb)
Illustration 6 g03893962
Remove bolt (14) and similar bolt (14) on opposite side of radiator guard and support housing (15). Remove radiator guard and support, the aftercooler, the hydraulic oil cooler, and radiator (15).Installation Procedure
Install radiator guard and support, the aftercooler, the hydraulic oil cooler, and radiator (15) in the reverse order of removal.