Check Open Crankcase Vent (OCV) (Tier 2/Stage II and Tier 3/Stage III)

  1. T8120002635
    T8120002635-UN-07JAN13

    A - Vent Hose

    Loosen clamp on crankcase vent hose (A).


  2. Remove crankcase vent valve (not shown) from rocker arm cover.

  3. Remove valve from crankcase vent hose and clean hose. Verify that hose is not plugged.

  4. Shake crankcase valve. If free movement of valve is heard while shaking, valve can be reused. Replace valve if rattle is not heard.

  5. Install the valve and vent hose. Attach valve to bracket with two screws provided. Tighten hose clamp securely.

WM05597,0000E99-19-20150206