ELBOW 1550545 - Caterpillar

Removal Procedure
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.
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 product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, PERJ1017, "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.
Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
Illustration 1 g01151335
Remove bolts (1) from water temperature regulator housing (2).
Illustration 2 g01151337
Remove water temperature regulator housing (2). Remove gasket (3). Remove water temperature regulators (4).
Illustration 3 g01151685
Remove seal (5) from water temperature regulator housing (2). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 221-8647 Seal Installer 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Clean the mating surfaces of the water temperature regulator housings.
Illustration 4 g01151691
Use Tooling (A) and install seal (5) into water temperature regulator housing (2).
Illustration 5 g01151337
Install water temperature regulators (4). Install a new gasket (3).
Illustration 6 g01151335
Position water temperature regulator housing (2). Install bolts (1).
Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" and Operation and Maintenance Manual, "Capacities (Refill)".