Cummins N14 STC, Celect, Celect Plus – Service Manual 004-001   Cam Follower Assembly

Remove the rocker lever covers. Refer to Procedure 003-011 in Section 3.

Remove the engine brake, if equipped. Refer to Procedure 020-024 in Section 20.

Remove the rocker lever assemblies. Refer to Procedure 003-009 in Section 3.

Remove the push rods. Refer to Procedure 004-014 in Section 4.

Remove the fuel pump. Refer to Procedure 005-016 in Section 5.

Remove the air compressor (if used). Refer to Procedure 012-014 in Section 12.

Remove the accessory drive.

Refer to Procedure 009-001 in Section 9.

NOTE: The fuel pump, air compressor, and accessory drive can be removed as an assembly.

Remove the cam follower housing assemblies as follows:

• Remove the six capscrews and studs from each cam follower housing.

NOTE:  Record the position of the studs prior to removal.

• Remove the cam follower housings and gaskets.

NOTE: To prevent increased wear, mark the cam follower housing assemblies as they are removed so they can be installed into their original location on the block.

Measure and record the thickness of the gaskets used between each cam follower housing and the block.

NOTE: The thickness of the gaskets controls the injection timing.

Discard the gaskets.

Remove the two locking screws.

NOTE: Each cam follower housing assembly consists of two shaft assemblies secured in a common center support with two locking screws.

Remove the two cup plugs from the housing.

CAUTION  Do not push the cup plug through the cam follower lever shaft bores. The bores will be damaged.

Use expansion plug driver, Part Number 3376813, and a mallet to remove the cup plugs.

Push the cup plug and the shafts through one end of the housing until the cup plug on the opposite
end of the housing is pushed from the housing bore.

Push the shafts the

opposite
direction through the housing until the cup plug on the other end of the housing is pushed from the housing bore.

Remove the shafts and the cam follower levers from the housings.

NOTE: To prevent increased wear, mark the cam follower shafts and the levers as they are removed so they can be installed into their original positions in the housing.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Use solvent to clean the cam follower components.

Dry with compressed air.

Use solvent to clean the cam follower shafts.

Dry with compressed air.

Make sure the oil drillings are not restricted or plugged.

Inspect the cam follower housings for cracks or other damage.

Inspect the locking screw holes for damaged or distorted threads.

Inspect the cam follower shafts for scoring or other damage.

Inspect the locking screw holes in each shaft. The grooves must
be clean and

not
damaged.

Inspect the cam followers for cracks or other damage.

Measure the cam follower roller side clearance.

Roller Side Clearance

NOTE: If the roller side clearance is

not
within these specifications, the roller

must be replaced.

Use a dial indicator to measure the cam follower to roller pin clearance.

Roller to Pin Clearance

NOTE: If the roller pin clearance is not within these specifications, the roller and the pin must be replaced.

Inspect the rollers for flat spots, restriction of rotation, or other damage.

Inspect the sockets for excessive wear or other damage.

A good even seating pattern

must
be seen when inspecting the cam follower socket.

When parallel grooves and scratches are observed or the contact area extends into the oil hole chamfer of the socket, the worn socket

must
be replaced.

NOTE: If excessive wear or damage is found in the sockets, inspect the push rods. Do not use push rods with worn balls in cam followers with new sockets. Refer to Procedure 004-014 in Section 4.

NOTE: The N14 cam follower sockets are identified by two grooves 180 degrees apart from one another.

Use clean 15W-40 oil to lubricate the cam follower sockets.

Use clean Lubriplate® 105, or equivalent, to lubricate the bushingless cam followers and cam follower shafts.

Install the levers and the shafts in the housings back into their original locations.

Install the cup plugs in the housings as follows:

• Install two temporary capscrews in the shafts to prevent breaking the locking screws.
• Place sealant in the cup plug holes.
• Use the 7/8-inch cup plug driver (1), Part Number 3376813, to install the cup plugs.
• Remove the temporary screws.
• Install the two locking screws in the shafts.

Install the new cam follower gaskets to the block as follows:

• Obtain gaskets with the same thickness as the gaskets removed.
• Install the gaskets over the dowel pins in the block.

Lubricate the camshaft prior to installing the cam followers.

NOTE: The Print-o-Seal gasket

must
be against the cylinder block with the sealing bead toward the cam follower housing.

Install the cam follower assembly as follows:

• Install the capscrews and the studs in the same position from which they were removed.

• Tighten the capscrews in the alternating sequence, as illustrated, to the following torque values:

NOTE: The fuel pump, air compressor, and accessory drive can be installed as an assembly.

• Check the injection timing. Refer to Procedure 006-025 in Section 6.
• Install the accessory drive. Refer to Procedure 009-001 in Section 9.
• Install the air compressor (if used). Refer to Procedure 012-014 in Section 12.
• Install the fuel pump. Refer to Procedure 005-016 in Section 5.
• Install the push rods. Refer to Procedure 004-014 in Section 4.
• Install the rocker lever assemblies. Refer to Procedure 003-009 in Section 3.
• Adjust the valves and injectors. Refer to Procedure 003-004 in Section 3.
• Install and adjust the engine brake. Refer to Procedure 020-024 in Section 20.
• Install the rocker lever covers. Refer to Procedure 003-011 in Section 3.
• Operate the engine and check for leaks and proper operation.