BOLT-SPECIAL 2508738 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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 fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
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Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Remove plug (1) and the O-ring seal from the engine oil filter base.
Remove valve spring (2) and bypass valve (3) from the engine oil filter base. Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Inspect the condition of the O-ring seal. Replace the seal, if necessary.
Install bypass valve (3) and valve spring (2) in the engine oil filter base.
Install plug (1) in the engine oil filter base.