How to Inspect and Clean Cylinder Block for John Deere PowerTech 9.0 OEM Engine

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This instruction show you guide on how to inspect and clean cylinder block for John DEERE PowerTech 9.0 OEM engine.

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NOTE:

All components (including piston cooling orifices),coolant gallery plugs and oil gallery plugs must be removed from the cylinder block for inspection and cleaning. Refer to the proper group for removal of all external and internal mounted components.

1.Use D17015BR O-ring Bore Cleaning Brush or anequivalent brush to thoroughly clean all debris fromcylinder liner O-ring bores.

2 Remove cylinder head locating dowels, if not previously removed. Clean out all threaded holes for cylinder head mounting cap screws in top deck of cylinder block. Use JDG681 Tap or an equivalent 9/16-12 UNC-2A tap approximately 88.9 mm (3.5 in.) long. Use compressed air to remove any debris or fluid which may be present in the cap screw hole.

IMPORTANT: If cylinder block is cleaned in a hot tank, be sure to remove any aluminum parts. Aluminum parts can be damaged or destroyed by hot tank solutions.

Removeall serial number plates.

3 Clean block thoroughly using cleaning solvent,pressure steam, or a hot tank.

4 Inspect liner support flange (C) for burrs. If burrs are present, use a small half-moon file and LIGHTLY file (in a circular motion) burr off at approximately a 60° angle. DO NOT let file hit top deck of cylinder block (B) while filing.

NOTE: DO NOT file liner support flange excessively.

Excess filing can damage liner support flange and allow an improper liner fit. Thoroughly clean all filings from cylinder block.

5 Measure liner flange counterbore depth (A) in block and compare with specification given below.

Specification

Cylinder Block Flange

Counterbore—Depth……………… 11.913—11.963 mm (0.469—0.471 in.)

Carefully inspect block for cracks or any other physical damage. If a cracked block is suspected, pressure-test the block. A procedure for pressure testing is outlined in FOS (Fundamentals of Service)

Manual-ENGINES. Replace block if there is evidence of a crack or physical damage.

More repair case for John Deere,please refer to:John Deere Trouble Repair

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