POWER TAKE-OFF GROUP-REAR 3S1660 - Caterpillar

TYPE="LEVEL" DEPTH="1" @@@-->Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: The engines are equipped with either an aluminum valve cover or with a composite valve cover. The aluminum valve cover has a seal that fits between the valve cover and the inlet manifold. The composite valve cover has a seal that is permanently fixed to the side of the valve cover.
Illustration 1 g00547002
3054 Engine
Illustration 2 g00572213
3056 Engine
Illustration 3 g00547003
Aluminum valve cover
Illustration 4 g00547004
Composite valve cover
Loosen hose clamp (1) from breather hose (2) .
Disconnect breather hose (2) from valve cover (4) .
Remove three nuts (3), steel washers (6), and sealing washers (8) .Note: When you remove nuts (3), ensure that the nuts on the rocker arm bracket are not loosened.Note: Current production engines have an additional shim washer (7) .
Remove valve cover (4), gasket (10), and seal (5) from the cylinder head.
Remove seal (9) for the oil filler cap.Installation Procedure
Note: The engines are equipped with either an aluminum valve cover or with a composite valve cover. The aluminum valve cover has a seal that fits between the valve cover and the inlet manifold. The composite valve cover has a seal that is permanently fixed to the side of the valve cover.
Illustration 5 g00547002
3054 Engine
Illustration 6 g00572213
3056 Engine
Illustration 7 g00547003
Aluminum valve cover
Illustration 8 g00547004
Composite valve cover
Inspect the condition of the gaskets and the seals. Replace the gaskets and the seals, if necessary.
Install seal (9) for the oil filler cap, if necessary.
Apply 8T-9022 Silicone Gasket to gasket (10) .Note: Ensure that the flat face of the gasket is toward the valve cover.
Install gasket (10), seal (5), and valve cover (4) on the cylinder head.
Lubricate three nuts (3) with clean engine oil.
Install three nuts (3), steel washers (6), and sealing washers (8) .Note: When you install three composite nuts (3) without shim washers (7), tighten the nuts to a torque of 20 N m (15 lb ft). Do not overtighten the nuts.Note: When you install three aluminum nuts (3) with shim washers (7), tighten the nuts to a torque of 30 N m (22 lb ft). Do not overtighten the nuts.
Connect breather hose (2) to valve cover (4) .
Tighten hose clamp (1) on breather hose (2) .