SPACER 1B7904 - Caterpillar

Caterpillar Products:
3500 Family Generator Sets and Power Modules
3500 Family Pumpers
G3500 Family Generator Sets and Power Modules Engine: Commercial
3500 and 3500B Family All
G3500 Family AllReferenceFor more information, refer to Engine News, SEBD9326, 01 October 2003, "The Cylinder Block Has Changed".Description of Change: Anaerobic sealants replace the existing gasket for the flywheel housing to the block joint on 3500 Diesel Engines and 3500 Gas Engines. Hard washers have been added to the bolts.Adaptable To: The sealants are adaptable to the flywheel housing to the block joint on all 3500 Diesel Engines and all 3500 Gas Engines.The following part numbers replace the former gasket:
185-3984 Gasket Sealant
4C-5300 Gasket Sealant Apply the Sealant
Use the applicable Disassembly and Assembly manual for the tools and for the procedure in order to remove the flywheel housing.
After removing the flywheel housing, clean the mating surface of the cylinder block and the mating surface of the flywheel housing. If necessary, use a gasket scraper and a solvent in order to remove any residual gasket material. Both mating surfaces must be clean, dry, and free of any oil before the anaerobic sealant is applied.
Illustration 1 g01256259
Location for the sealant
Apply a 6 mm (0.250 inch) of 4C-5300 Gasket Sealant or 185-3984 Gasket Sealant to the mating surface of the flywheel housing. Refer to Illustration 1.Use the applicable Disassembly and Assembly manual for the tools and for the procedure in order to install the flywheel housing. During assembly, use the hard washers that are listed in Table 1. Refer to the Specifications manual for the torque values.
Table 1
Diameter of the Bolts
inch     Hard Washer    
1/2     5P-8245    
5/8     5P-8247