C6.6 Engines for Caterpillar Built Machines Crankcase Breather - Remove - Filtered Breather Caterpillar

Removal Procedure

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Illustration 1	g01339595
Breather tool

1. To remove the breather body, Tooling (A) must be used. The tool should be fabricated from 3.1 mm (1/8 inch) steel stock. The dimensions for the tool are given in Illustration 1. All dimensions are shown in millimeters.

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Illustration 2	g01339597

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Illustration 3	g03704554

Note: Illustration 3 shows the later type of crankcase breather cover that is installed in the valve mechanism cover. The later type of crankcase breather cover is not serviceable.

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Illustration 4	g01339655

2. Remove canister (20) for the breather. Refer to Operation and Maintenance Manual, "Crankcase Breather (Canister) - Replace".

3. Loosen clamp (19) and remove hose (21) .

4. Release two spring clamps (14) in order to remove hose (15) . Remove the hose.

5. Remove bolts (17) . Remove base (18) from the inlet manifold.

   If a spacer is installed between the base and the inlet manifold, remove spacer (16) .

6. Carefully pry cover (1) from breather body (4) .

   Note: Note the orientation of the outlet.

7. Remove gauze (2) from breather body (4) .

8. Remove O-ring seal (3) from breather body (4) .

9. Use Tooling (A) in order to unscrew breather body (4) from adapter plate (8) .

10. Remove O-ring seal (5) from breather body (4) .

11. Remove bolts (6) and washers (7) from adapter plate (8) .

12. Remove adapter plate (8) from valve mechanism cover (10) .

13. Remove O-ring seal (9) from adapter plate (8) .