DETROIT DIESEL 53
ENGINE COOLING FAN
The engine cooling fan is driven by a pair of V-drive
belts from the crankshaft pulley (Fig. 1)
The tapered roller bearings, used in the fan hub on V-
pressure lubricated prior to
assembly. the cavity between the bearings is packed
with Chevron BRB No. 2 grease or an equivalent
performance grease at the time the hub is assembled.
Also the fan hub cap is packed approximately 75% full
The belt-driven fan is bolted to a combination fan hub
of grease. Repack the fan hub assembly as outlined in
and pulley which turns on two tapered roller bearings.
the assembly procedure. The hub cap at the front and a
seal at the rear of the hub prevents leakage of the
Remove Fan, Hub and Adjusting Bracket
The fan blades must rotate in a vertical plane parallel
with and a sufficient distance from the radiator core.
Fig. 1. - Belt-Driven Fan Mounting (V-Type
1972 General Motors Corp.
SEC. 5.4 Page 1