CUMMINS N14 Specifications download pdf (Page 259)

100

101

Remove the injectors from the cylinder head and check

the pattern of the blueing compound in the injector sleeve.

The blueing pattern in the injector seating area (1) must

be visible 360 degrees around the seating area.

The injector bore seating width (2) must be a minimum

of 1.52 mm [0.060-inch].

NOTE: If the injector protrusion is more than the maximum

specified or if the injector sleeve blueing pattern does not

meet the specifications given, the injector sleeve(s) must be

replaced. Refer to Cylinder Head - Replacing the Injector

Sleeves (02-07).

Grinding the Valve Seats

NOTE: If the valve guide inside diameter exceeds the max-

imum worn limit, replace the valve guide before grinding the

valve seat.

Use a valve seat grinding machine, Part No. ST-685, and

valve guide arbor set, Part No. ST-663, when grinding the

valve seat inserts. Install the valve guide arbor (1) in the

valve guide with the arbor puller (2).

NOTE: Rotate the arbor to make sure it is correctly installed.

Install a valve seat grinding stone (3), Part No. ST-685-9,

on the grinder unit.

NOTE: The grinding stone must be the correct size and have

the correct angle (2 1/4-inch diameter X 30-degree grinding

angle).

Install the grinder unit on the arbor.

NOTE: The grinding stone (3) must not touch the valve seat

insert when the drive unit motor is started.

Cylinder Head Cylinder Head - Rebuild (02-02)

N14 Page 2-17

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CUMMINS N14 Specifications Page 259

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