PIN 0859023 - Caterpillar

2. Disconnect three hoses (2) from crankcase breather group (1). 3. Remove two bolts (3) that hold breather group (1) to the cylinder head assembly. Remove the crankcase breather group. 4. Loosen clamp (6). Separate breather (4) from bracket assembly (5). 5. Remove O-ring seal (7) from the breather. The following steps are for the installation of the crankcase breather group.6. Check the condition of all parts of the crankcase breather group. If any of the parts are worn or damaged, use new parts for replacement.7. Install the crankcase breather group in the reverse order of removal. For further details regarding servicing of the crankcase breather group, see the topic "Engine Crankcase Breather" in the Operation & Maintenance Manual.