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
Refer to Special Publication, NENG2500, "Caterpillar Tools
and Shop Products Guide" for tools and supplies suitable
to collect and contain fluids on Caterpillar products.
Dispose of all fluids according to local regulations and
Drain the coolant from the cooling system into a suitable
container for storage or disposal.
Remove upper radiator hose.
Typical example of Type and 9RM engines
For a complete description of Type 1 and Type 2
engines, refer to the Disassembly and Assembly,
"Engine Design" topic.
Remove six bolts (1) that hold cover (2) and bracket (3)
Type 2 engines and 7BJ engines have four
mounting bolts (1) that hold cover (2) in position.
Remove bracket (3) and cover (2) from the water
temperature regulator housing.
Typical example of Type 1 and 9RM engines
Remove water temperature regulator (4) and the gasket
from water temperature regulator housing (5).
Type 1 and 9RM engines may have two water
temperature regulators for some engine ratings.
Type 2 and 7BJ engines will have one water
temperature regulator for all engine ratings.
Refer to the Testing and Adjusting Module for the
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
Inspect the condition of the gasket. Replace the gasket,
Typical example of Type 1 and 9RM engine