BRIDGE 2657537 - Caterpillar

Clean the crankcase breather regularly in order to prevent excessive crankcase pressure that will damage the engine's seals.Perform this maintenance when the engine is stopped.
Illustration 1 g00882365
Loosen clamps (1). Slide the clamps off tubes (2). Remove the tubes.
Loosen clamps (3). Remove each breather assembly (4) from the elbow assembly.
Remove O-ring seals from the elbow assembly. Inspect the O-ring seals for good condition. Obtain new O-ring seals, if necessary.
Turn the breathers upside-down in order to inspect the condition of the breather elements. Note: Do not replace the breathers in the upside-down position. If breathers are not replaced properly water could enter the crankcase and damage to the engine could result.Clean the breather elements with clean, nonflammable solvent. If the breather elements remain contaminated after the cleaning, discard the breather assemblies and obtain new breather assemblies. Do not attempt to disassemble the breather assemblies.Allow the breather elements to dry before installation.Note: Lubricate the bore of the elbow assembly with clean engine oil and install the O-ring seals.
Install breather assemblies (4) and tighten clamps (3). Install elbows (2) and clamps (1). Tighten the clamps.