Chapter 8 - Caterpillar Engine and Related Systems
267
12. Remove the exhaust system, complete.
See Figure 8.129.
12a. Unbolt the front muffler bracket from the
frame using a pair of 1/2” wrenches. One
bolt must be removed, the other may be
loosened.
12b. Unbolt the exhaust pipe from the exhaust
manifold using a 13mm wrench.
12c. Pivot the exhaust system forward and up
to remove it.
12d. Discard the manifold gasket: replace it
with a new one on installation.
12e. Tape-off or plug the exhaust manifold port.
13. Match-mark and disconnect the coolant hoses
using a 5/16” driver. See Figure 8.130.
Figure 8.129
Unbolt here
Unbolt here
Figure 8.130
Disconnect and remove
coolant hoses
• Remove the hoses and rigid pipe that connect
the thermostat housing to the to-radiator pipe.
• Remove the hose that connects the return pipe
to the water pump.
• Inspect the hoses and clamps. If the hoses are
cracking, softening, or swelling, replace them
with new ones and thoroughly inspect the hoses
that connect the coolant pipes to the radiator.
• If the engine is to be stored for any length of
time, tape-off or plug the pipes and ports.
14. Clamp and disconnect the fuel return line from
the injector rail. Cap the rail to prevent contami-
nation. See Figure 8.131.
15. Clamp and disconnect the fuel supply line that
feeds the fuel injectors. Cap the rail to prevent
spillage or contamination. See Figure 8.132.
Figure 8.131
Return line
clamped
Figure 8.132
Supply line
clamped
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