DETROIT DIESEL 53
Fig. 2. - Removing Fan Hub (Pulley)
Bent fan blades reduce the efficiency of the cooling
system, may throw the fan out of balance, and are apt to
damage the radiator core. Before removing the fan
blades, check the blades for alignment. Do not rotate
the fan by pulling on the fan blades.
1. Remove the attaching bolts and lock washers and
remove the fan and spacer (if used).
2. Loosen the fan hub adjusting bracket bolts and
remove the drive belts. Then withdraw the bolts and
washers and remove the hub and bracket assembly
from the engine.
Disassemble Hub and Adjusting Bracket
1. Remove the fan hub cap (if a spacer and cap
assembly were not used).
2. Remove the hub retaining bolt and special washer
1972 General Motors Corp.