D349 INDUSTRIAL & MARINE ENGINES Caterpillar

1. Drain oil filter housing.

2. Remove the valve cover plate. Remove valve spring (3) and plunger (2).

3. Remove clamp retaining bolt (4). Remove valve body mounting bolts (1), and remove valve body.

Install Oil Cooler Bypass Valve

1. Clean all parts thoroughly before assembling valve.

2. Position the valve body (1) on engine, and install mounting bolts.

3. Install clamp retaining bolt.

4. Lubricate the plunger and bore in valve body with clean SAE 30 oil.

5. Install plunger and spring in valve body.

6. Install cover plate.

7. Check the oil level in crankcase and fill as necessary.