ISBe/ISB Series Engines – 008-036   Fan Hub, Belt Driven

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.
• Remove the cooling fan drive belt.
• Remove the fan spacer and pulley.
  Refer to Procedure 008-039 (Fan Spacer and Pulley) in Section 8.

Remove the four fan hub mounting capscrews.

Remove the fan hub.

NOTE: There are many available fan hub configurations. Be sure to note the location, orientation, and mounting pattern of the hub prior to removal from the engine.

WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. 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.

Steam clean the exterior of the fan hub.

Dry with compressed air.

Inspect the fan hub for indications of oil seal leakage.

Inspect the fan hub for cracks or other damage.

Inspect the fan hub chamfer and fan pulley mating surface for damage.

Replace the fan hub if damage is found.

Turn the fan hub by hand to check for freedom of rotation.

The fan hub
must spin freely without any wobble or excessive end clearance.

Inspect the fan hub bearing for wear.

The bearing
must have a minimal amount of side-to-side or end-play movement.

Replace the fan hub if there is more than 0.15 mm [0.006 in] of end play in the fan hub.

NOTE: Some fan hub assemblies can be rebuilt with new bearings and related components. Check for part availability before disassembling the fan hub.

Install the fan hub.

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 the fan spacer and pulley.
  Refer to Procedure 008-039 (Fan Spacer and Pulley) in Section 8.
• Install the cooling fan drive belt.
• Connect the batteries.
• Operate the engine and check for proper operation.