reworked spacer should be mated with the fan hub assembly. If a former thin spacer (0.500-inch thick) is used
in conjunction with the reworked thick spacer, it should be positioned against the fan.
The 0.500-inch thick spacer cannot be reworked into the new O.560-inch thick
A grease fitting may be added to former fan hub assemblies used on vehicle engines to permit periodic
Rework the fan hub as follows:
Refer to Engine Cooling Fan and disassemble the fan hub assembly, and clean the parts
Drill and tap the fan hub, at the location shown in Fig. 1, to accept a 1/8 PTF x 11/16 inch threaded
lubricator fitting. Clean the hub to remove any metal chips.
Refer to Engine Cooling Fan and reassemble the fan hub. Discard the
Install a new fan hubcap which is threaded for a relief valve (Fig. 1).
Install a grease fitting in the fan hub and a relief valve in the fan hubcap. Refer to Preventive
Maintenance for the maintenance schedule.
Figure 2 . Location of Fan Hub Grease Fitting and Relief Valve