PIN 7P9242 - Caterpillar

Engine: C15 (S/N: SDP1-UP)Introduction
This Special Instruction details the procedure to fabricate new CGI lines on certain C15 Truck Engines. These engines are experiencing condensation in the lines freezing when the truck is shut down in severe temperatures. The Engine Control Module (ECM) will log a "3487-7 Air Pressure Control Not Responding" fault code and will not allow a manual regeneration. Refer to the procedure below in order to correct this issue.Required Parts
Table 1
New Part Number     Description     Quantity    
1P-4278     Hose Clamp     6    
238-5079     O-Ring Seal     2    
337-4178     Hose     Bulk hose cut to size    
341-0098     Elbow     2    
368-6475     Bracket     1    
9W-4216     Spacer     2    Installation Procedure
Remove all necessary engine and chassis components needed in order to be able to access the CGI lines and sensor assembly.
Illustration 1 g02470377
(1) Sensor block assembly (2) Clamp assembly (3) CGI lines (4) Fittings
Disconnect lines (3) from fittings (4) .
Remove the sensor block assembly.
Remove the sensor block from the mounting bracket.
Remove fittings (4) from the sensor block.
Illustration 2 g02474476
(2) Clamp assembly (5) Location to cut the CGI lines
Remove clamp (2) in order to cut both CGI lines at location (5). A tubing cutter must be used to cut the CGI lines in order to prevent debris from entering the sensor lines.Note: Do not use