Centinel System – Repair Manual – 001-080   Gear Cover, Lower

• Twist the oil filler connector
  counterclockwise and remove
• Remove the water pump drive belt. Refer to Procedure 008-003 (Drive Belt, Water Pump) in Section 8
• Remove the alternator drive belt. Refer to Procedure 013-005 (Drive Belt, Alternator) in Section 13
• Remove the crankshaft pulley and vibration damper(s). Refer to Procedure 001-022 (Crankshaft Pulley) in Section 1
• Remove the front crankshaft seal. Refer to Procedure 001-023 (Crankshaft Seal, Front) in Section 1.

NOTE: If the gear cover contains an o-ring seal groove for the crankshaft seal and the seal needs to be replaced, the lower gear cover
must also be replaced. The new crankshaft seal has the o-ring incorporated into the seal.

Remove the 15 capscrews and the lower gear cover. Discard the strip seal.

NOTE: All lower gear covers have either a beveled half groove or a full o-ring groove under the crankshaft seal flange.

Full o-ring groove covers contain an o-ring in the lower gear cover groove and were only used prior to June 5, 1999. The lower gear cover
must be replaced if installing a new seal.

Beveled half groove covers do
not contain an o-ring and
only require replacement if damaged.

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

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

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

Clean the sealing surface on the rear face of the lower gear cover and seal groove on the gear housing.

Use steam or solvent to clean the lower gear cover. Dry with compressed air.

Inspect the lower gear cover for cracks or other damage.

If the cover is cracked, it
must be replaced.

If the gear cover contains an o-ring groove for the crankshaft seal and the cover is to be replaced, the crankshaft seal
must also be replaced.

Inspect the studs for damage. If the studs are damaged, the cover
must be replaced.

Place the lower gear cover on a flat surface and inspect it for flatness.

It is an acceptable practice to use a mallet to straighten a lower gear cover with minor bends.

If necessary, lay the gear cover on a flat surface and hit the cover to remove minor bends.

Install a new strip seal.

Orient the overlap joint to the upper left of the gear housing as shown.

Use a small amount of RTV at the overlap joint of strip seal.

NOTE: Do
not tighten the capscrews until the new crankshaft seal is installed. The crankshaft seal
must be installed first to locate the gear cover properly.

Position the lower gear cover with the 15 capscrews. Hand-tighten the capscrews.

Install a new crankshaft seal. Refer to Procedure
001-023 (Crankshaft Seal, Front) in Section 1.

Tighten the 15 capscrews in the sequence shown.

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 the crankshaft pulley and vibration damper(s). Refer to Procedure 001-022 (Crankshaft Pulley) in Section 1
• Install the fan hub assembly. Refer to Procedure 008-036 (Fan Hub, Belt Driver) in Section 8
• Install the alternator drive belt. Refer to Procedure 013-005 (Drive Belt, Alternator) in Section 13
• Install the water pump drive belt. Refer to Procedure 008-003 (Drive Belt, Water Pump) in Section 8
• Install the oil filler connector
• Operate the engine and check for leaks.