N14 Base Engine Troubleshooting and Repair Manual – 001-031   Gear Cover, Front

Remove the fan. Refer to Procedure

008-036-002.

Remove the fan drive belts and the water pump belt. Refer to Procedures

008-002-002 and

008-003-002, respectively.

Remove the alternator drive belts. Refer to Procedure

013-001-002.

Remove the accessory drive pulley. Refer to Procedure

009-004-002.

CAUTION  If the accessory drive dowel pin has been installed in the accessory drive shaft, the dowel pin must be removed before attempting to remove the gear cover to prevent damage to the accessory drive bushing.

Remove the camshaft support and the thrust bearing. Do

not
discard the shims. Refer to Procedure

001-009-002.

Remove the vibration damper and the crankshaft pulley. Refer to Procedures

001-052-002 and

001-022-002, respectively.

Remove the four capscrews which hold the oil pan to the gear cover.

Loosen all remaining oil pan mounting capscrews four to five turns.

Use an overhead hoist or a hydraulic arm to support the engine.

Remove the capscrews which hold the front engine support to the crossmember of the equipment.

Remove the eight capscrews and the front engine support.

CAUTION  Use extreme care when releasing the oil pan gasket from the gear cover to prevent damage to the gasket. If the gasket is damaged, the oil pan must be removed and the gasket replaced. Refer to Procedure 007-025-002.

Insert a feeler gauge or a shim stock between the gear cover and the oil pan gasket. Move the feeler gauge or the shim stock back and forth to release the gasket from the gear cover.

Remove one capscrew on each side of the gear cover, and install a 7/16 – 20 x 4-inch guide stud in each location to support the cover during removal.

Remove the remaining gear cover capscrews, and remove the gear cover.

Remove the front crankshaft seal. Refer to Procedure

001-023-002.

Remove the accessory drive seal. Refer to Procedure

001-003-002.

Clean the gasket surface of the cylinder block.

Clean the gear cover.

Inspect the gear cover for cracks or damage.

Measure the accessory drive seal bore.

NOTE: Replace the gear cover if the accessory drive seal bore is

not
within specifications.

Measure the crankshaft seal bore.

NOTE: Replace the gear cover if the crankshaft seal bore is

not
within specifications

Measure the accessory drive bushing inside diameter.

NOTE: Replace the bushing if it is

not
within specifications. Refer to Procedure

001-066.

Install one 7/16 – 20 x 4-inch guide stud into each side of the gear cover mounting flange to align the cover.

Install the gear cover gasket over the guide studs and the dowel pins.

NOTE: Use a film of Lubriplate® 105 or its equivalent or grease to hold the gear cover gasket in place, if necessary.

Install the gear cover and the mounting capscrews. Tighten the capscrews to the following torque sequence as shown:

Cut off the ends of the gasket even with the oil pan mounting flange.

Mount a dial indicator on the front face of the crankshaft. Put the indicator plunger against the oil seal bore, and set the dial indicator at “0” (zero).

Rotate the crankshaft one complete revolution while monitoring the indicator. Use the accessory drive nut to bar the engine over. The total indicator reading

must not
exceed 0.38 mm [0.015-inch].

If the total indicator reading exceeds 0.38 mm [0.015-inch], remove the gear cover. Check the cover and the housing for nicks or burrs.

Clean the gear cover and the housing surfaces thoroughly.

Repeat the gear cover installation procedure, and check the total indicator reading again.

Install the front engine support and the eight mounting capscrews. Tighten the capscrews.

Lower the engine to the crossmember. Install and tighten the capscrews which hold the front engine support to the crossmember. Refer to the manufacturer’s torque specifications.

Install the front crankshaft seal. Refer to Procedure

001-023-026.

Install the crankshaft pulley and the vibration damper. Refer to Procedures

001-022-026 and

001-052-026, respectively.

Install a new accessory drive seal. Refer to Procedure

001-003-026.

Install the dowel pin into the accessory drive shaft (if removed).

Install the accessory drive pulley. Refer to Procedure

009-004-026.

Install the camshaft support and the thrust shims into the gear cover. Refer to Procedure

001-009-026.

Install the water pump belt and the fan drive belts. Refer to Procedures

008-003-026 and

008-002-026, respectively.

Install the fan. Refer to Procedure

008-036-026.

Install and adjust the alternator drive belts. Refer to Procedure

013-005-029.

Install the four capscrews which hold the oil pan to the gear cover.

Tighten one of the 7/16-inch oil pan mounting capscrews on each side of the oil pan, halfway between the front and the rear of the oil pan.

Tighten the four 5/16-inch capscrews in the rear of the oil pan in the sequence shown.

Tighten the thirty-two (32) 7/16-inch capscrews in the sequence shown.

Operate the engine until it reaches a temperature of 82°C [180°F], and check for leaks.