Cummins N14 STC, Celect, Celect Plus – Service Manual 016-005   Flywheel

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Disconnect the batteries. Refer to the OEM service manual.
• Make sure vehicle is immobilized and safe to work on.
• Remove the vehicle driveline and the transmission. Refer to the OEM service manual.

Install two 1/2 – 13 x 1 1/2 puller capscrews which have a minimum of 1 1/4-inch threaded area at points (1) and (2).

Remove capscrews (3) and (4), and install two 5/8 – 18 x 6-inch guide studs, Part Number 3824462.

Determine the capscrew thread size, and install two “T-handles”, Part Number 3824463, into the flywheel at points (4) and (5).

Remove the remaining four flywheel mounting capscrews.

NOTE: For Rail Applications the flywheel mounting capscrews must be discarded and replaced.

WARNING  This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

Tighten capscrews (1) and (2) in alternating sequence to loosen the flywheel.

WARNING  When using a steam cleaner, wear protective clothing, as well as safety glasses or a face shield. Hot steam can cause serious personal injury.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles, as well as 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 a wire brush and solvent or steam to clean the crankshaft pilot bore.

Dry with compressed air.

Inspect for nicks or burrs.

Use a fine crocus cloth to remove small nicks and burrs.

Use a crack detection kit, Part Number 3375432, to check for cracks in the flywheel.

WARNING  Do not use a cracked flywheel. A cracked flywheel can break and cause personal injury or property damage.

Inspect the flywheel ring gear teeth for cracks and chips.

NOTE: If the ring gear teeth are cracked or broken, the ring gear must be replaced.

NOTE: If an “old” style flywheel is fitted, it must be replaced with a “new” style flywheel. The “new” style flywheel provides for greater integrity of the crankshaft/flywheel bolted joint.

CAUTION  “Old” style flywheels must be scrapped and not reused. “Old” style flywheels are not compatible for use with the spacer/clamping ring.

Check the flywheel mating face of the crankshaft for signs of pitting, fretting or corrosion. Refer to Procedure 001-016 in Section 1.

Use the dial indicator gauge (1), Part Number 3376050, or equivalent, and dial gauge attachment (2), Part Number ST-1325, to inspect the flywheel bore (3) and the surface (4) runout.

Install the attachment to the flywheel housing.

Install the gauge on the attachment.

Install the contact tip of the indicator against the inside diameter of the flywheel bore, and set the dial indicator at “0” (zero).

Use the accessory drive shaft to rotate the crankshaft one complete revolution.

NOTE: The total indicator reading (TIR) must not exceed 0.127 mm [0.0050 in].

NOTE: If the TIR is greater than the specification, complete the following:

• Remove the flywheel.

• Inspect the flywheel mounting surface for dirt, paint, or damage.

• Inspect the crankshaft for dirt or damage.

NOTE: If the crankshaft is found to be damaged, replace the crankshaft.

• Install the flywheel, and inspect the bore runout.

• Replace the flywheel if the runout does not meet specifications.

Install the contact tip of the indicator against the flywheel face, as close to the outside diameter as possible, to inspect the face (4) runout.

Push the flywheel forward to remove the crankshaft end clearance. Adjust the dial on the indicator until the needle points to “0” (zero).

Use the accessory drive shaft to rotate the crankshaft one complete revolution. Measure the flywheel runout at four equal points on the flywheel.

NOTE: The flywheel must be pushed toward the front of the engine to remove the crankshaft end clearance each time a point is measured.

The TIR must not exceed the following specifications:

If the flywheel face runout is not within specifications, remove the flywheel.

Check for nicks, burrs, or foreign material between the flywheel mounting surface and the crankshaft flange.

Inspect the flywheel for any deformation, bending, or cracking that can contribute to excessive face run-out. Replace if necessary.

NOTE: Use a new pilot bearing when installing a new or rebuilt clutch.

Use a mandrel and a hammer to remove the pilot bearing.

Use a 240 grit emery cloth to clean the pilot bore.

Use a mandrel and a hammer to install the pilot bearing.

NOTE: The pilot bearing must be installed flush with the pilot bore surface.

WARNING  This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

Install two 5/8 – 18 x 6-inch guide studs, Part Number 3824462, into the crankshaft flange.

Install the flywheel onto the guide stud.

Lubricate the threads of the capscrews and the surface of the washers with 15W-40 lubricating oil.

Install the four capscrews.

Remove the “T-handles”, Part Number 3824463, and the guide studs, Part Number 3824462.

Install the remaining two capscrews into the holes from which the guide studs were removed.

Tighten the capscrews in a star pattern.

Install the spacer/clamping ring, Part Number 3287628.

WARNING  Do not reuse the existing capscrews. Replace all used flywheel capscrews with new capscrews. Do not replace or reuse the existing washers.

Lubricate the threads of the capscrews and the underhead area of the capscrews with clean 15W-40 lubricating oil.

Install the four new capscrews, Part Number 3287753.

Remove the “T-handles”, Part Number 3824463, and the guide studs, Part Number 3824462.

Install the remaining two capscrews into the holes from which the guide studs were removed.

Tighten the capscrews in the sequence shown.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Install vehicle driveline and transmission. Refer to the OEM service manual.
• Connect the batteries and mobilize the vehicle. Refer to the OEM service manual
• Operate the engine and check for proper operation.