Cummins N14 STC, Celect, Celect Plus – Service Manual 008-062   Water Pump

WARNING  Coolant is toxic.  Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

• Drain the cooling system. Refer to Procedure 008-018 in Section 8.
• Remove the water pump drive belt. Refer to Procedure 008-003 in Section 8.
• Remove the fan hub. Refer to Procedure 008-036 in Section 8.
• Remove the water pump idler assembly. Refer to Procedure 008-064 in Section 8.

Remove the coolant inlet transfer connection from the water pump.

NOTE: The water pump must be removed carefully to prevent damage to the impeller.

Remove the six mounting capscrews from the water pump.

Remove the water pump from the engine.

Remove the water pump out and in a downward direction to clear the dowel pin, and disconnect the water transfer tube attached to the thermostat housing.

Remove the pulley using a puller, Part Number 3375257.

Remove the impeller using a puller, Part Number 3823040.

Remove the retaining ring that holds the bearing assembly and shaft in the body.

Support the pulley side of the body in an arbor press. Push the shaft from the impeller end to remove the outside oil seal, bearings, and shaft from the body.

Use a punch and hammer to remove the inner oil seal and the slinger from the shaft.

Discard the inner oil seal and slinger.

Support the impeller side of the body.

Use a punch and hammer to remove the water seal and seat assembly from the body.

Discard the seal and seat assembly.

Use a bearing disassembly fixture, Part Number ST-114, to support the outer bearing and bearing spacer.

Push the shaft from the bearing and spacer. Discard the bearing.

Use the disassembly fixture to support the inner bearing. Push the shaft from the bearing and discard the bearing.

Use a gasket scraper to remove the gasket material from the gasket sealing surfaces.

Use Scotch-Brite® 7448, Part Number 3823258, to clean the following components:

• Bearing and oil seal bores of the water pump body
• Inside diameter of the coolant transfer tube bore in the water pump body
• Water pump shaft.

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 water pump components.

Dry with compressed air.

Inspect the water pump body for cracks, porosity, or excessive corrosion.

NOTE: If the component being inspected does not meet the specification given or if it is damaged, the component must be replaced.

Measure the water pump body bearing bore inside diameter.

Water Pump Body Bearing Bore Inside Diameter

Measure the water pump body seal and seat assembly bore inside diameter.

Seal and Seat Assembly Bore Inside Diameter

Inspect the water pump impeller for cracks or other damage.

Measure the water pump impeller bore inside diameter.

Impeller Bore Inside Diameter

Inspect the water pump drive pulley for cracks or other damage.

Inspect the pulley grooves and oil seal wear sleeve for wear or other damage.

Replace the wear sleeve if it is damaged or worn.

Measure the drive pulley bore inside diameter.

Drive Pulley Bore Inside Diameter

Inspect the water pump shaft for grooves, nicks, or other damage.

Shaft Journal Outside Diameter

Inspect the bearing retaining ring for nicks or cracks.

Discard the damaged components.

Use clean 15W-40 oil to lubricate the water pump shaft.

Use a water pump bearing mandrel, Part Number ST-658, to support a new inner bearing. Install the shaft into the bearing.

NOTE: Push the pulley end of the shaft through the bearing until the bearing is against the large diameter (shoulder) of the shaft.

Inspect the bearing spacer for cracks or other damage.

Check the thickness of the bearing spacer.

Bearing Spacer Thickness

Install the bearing spacer on the shaft.

Fill both bearings and the cavity of the spacer between the water pump bearings and Chevron® SRI grease, or equivalent.

Use a water pump bearing mandrel, Part Number ST-658, to support a new outer bearing.

Install the shaft and spacer into the bearing.

NOTE: Push the shaft through the bearing until the bearing is against the spacer. Make sure the inner race of the bearing is not overloaded from contact with the spacer. The bearings must rotate freely.

Install a new inner oil seal and new slinger onto the shaft.

Use a seal expander, Part Number 3823885, to install the seal.

Use water pump slinger, Part Number 3823816, to press the slinger to the proper location.

Prepare the outside diameter surface of the bearing with Loctite™ Primer T, Part Number ST-1272-13.

Apply a thin film of Loctite™ 609, Part Number 3823718, to the outside diameter of the bearings.

Support the impeller side of the water pump body in an arbor press. Use a water pump mandrel, Part Number ST-658, to install the bearing and shaft assembly in the water pump body.

Install the retaining ring into the groove in the water pump body.

NOTE: The flat side of the bearing retaining ring must be installed toward the bearing.

Install a new outside oil seal, using a mandrel to press the seal in flush with the housing.

Apply a thin film of pipe sealant, Part Number 3375066, to the outside diameter of the new water pump seal.

Support the pulley side of the water pump in an arbor press.

Install a new water pump seal over the shaft.

Use water pump seal mandrel, Part Number 3823815, to push the water pump seal into the water pump body.

The use of any tool other than Part Number 3823815 can result in seal damage.

Apply one drop of Loctite™ 290, Part Number 3823682, or equivalent, to the joint between the water pump shaft and the water pump seal.

NOTE: Do not allow any Loctite™ to contact the seal faces.

Prepare the drive pulley bore surface with Loctite™ Primer T, Part Number ST-1272-13.

Apply a light film of Loctite™ 609, Part Number 3823718, to the bore in the drive pulley.

Support the water pump pulley in an arbor press. Push the water pump shaft into the pulley bore until the pulley is against the large diameter (shoulder) of the shaft.

Prepare the impeller bore surface with Loctite™ Primer T, Part Number ST-1272-13.

Apply a light film of Loctite™ 609, Part Number 3823718, to the bore in the impeller.

Support the pulley end of the water pump shaft in an arbor press. Push the impeller onto the shaft until the end of the impeller hub is aligned with the end of the shaft.

Turn the water pump pulley by hand to inspect the bearings for freedom of rotation.

NOTE: If the water pump shaft does not rotate freely in the water pump body, the water pump must be disassembled, inspected, and assembled again.

Install the water transfer tube attached to the thermostat housing into the water pump.

Inspect the transfer tube o-ring. Replace if necessary.

Install the water pump to the block using the six mounting capscrews.

Tighten the capscrews to the following torque values:

Install the coolant inlet transfer connection and a new gasket onto the water pump.

Tighten the capscrews.

WARNING  Coolant is toxic.  Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

• Install the water pump idler assembly. Refer to Procedure 008-064 in Section 8.
• Install the fan hub. Refer to Procedure 008-036 in Section 8.
• Install the water pump drive belt. Refer to Procedure 008-003 in Section 8.
• Fill the cooling system. Refer to Procedure 008-018 in Section 8.
• Operate the engine and check for leaks.