CYLINDER HEAD GP 4527394 - Caterpillar

Illustration 1 g01018959
Typical example (1) 215-3198 O-Ring Seal (2) 237-3800 O-Ring Seal Dimensions of the 215-3198 O-Ring Seal provide a more precise fit than the previous 9X-7557 O-Ring Seal. The new dimensions produce the following results:
Improve resistance to damage during seal installation.
Improve resistance to damage during engine operation which can result in fuel dilution of the engine oil.The 215-3198 O-Ring Seal is also made from a carbon black filled fluorocarbon (FKM) material with a purple PTFE coating for easier installation. The improved seal material produces the following results:
Improve resistance to loss of sealing force for longer seal life.
Improve resistance to fuel system pressure and damage from extrusion for longer seal life.The 237-3800 O-Ring Seal retains the same dimensions as the previous 9X-7557 O-Ring Seal. The 237-3800 O-Ring Seal is made from a mineral filled fluorocarbon (FKM) material with a red PTFE coating for easier installation. The 237-3800 O-Ring Seal will migrate at a later date to the carbon black filled fluorocarbon (FKM) material.Note: The 215-3198 O-Ring Seal and the 237-3800 O-Ring Seal are not dimensionally interchangeable. The seals should only be used on the engines that are described above.In addition, new seal kits for the fuel injectors have been redesigned in order to include the new seal part numbers. The new kits will be direct replacements for the previous kits. Refer to your Parts Manual in order to determine the correct seal kit for your application. Table 1 lists the new part numbers for the kits.
Table 1
New Gasket and Seal Kits    
Engine Model     Part Number     Contents     Replaced Kit    
C-10
C-12
3196     224-5797 (1)     215-3198
119-8784
9X-7317 O-Ring Seals     193-3325    
3176B
3176C     223-5850 (1)     215-3198
9X-7722
9X-7317 O-Ring Seals     -    
3126B     242-1539 (1)     237-3800
150-4105
149-5240
148-2903
133-3715
109-3207 O-Ring Seals     196-6934
224-5358    
( 1 ) Check SIS Kits or TMI Kits for the latest application information of the gasket kit.