NUT 8B7207 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty.
A 369–9451 Grease - Start By:
Remove expansion tank. Refer to Disassembly and Assembly, "Expansion Tank - Remove and Install".
Drain the coolant from the cooling system into a suitable container for storage or disposal. Coolant should be drained until the coolant is below the level of the water temperature regulator housing. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".
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.
Note: Inspect all O-rings, seals, and gaskets for wear and damage. Replace if necessary.
Illustration 1 g06237623
Remove two bolts (1).
Illustration 2 g06237624
Remove four bolts (2) and housing (3).
Illustration 3 g06237629
Remove two regulators (4).Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Install water temperature regulators (6) in the reverse order of removal.
Apply Tooling (A) to O-rings to secure during assembly.
Fill the cooling system. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".