793C XQ Off-Highway Truck Fan Drive Hydraulic System Caterpillar


Suction Fan

Usage:

793C CBR



Illustration 1g00916055

Typical rear view of the radiator fans

(1) Torque for the 16 bolts that are used to fasten the two support assemblies ... 105 ± 20 N·m (77 ± 15 lb ft)




Illustration 2g00944642

Typical detail of the motor mounting

(2) Torque for the eight bolts that are used on the fan drive motors ... 530 ± 70 N·m (391 ± 52 lb ft)




Illustration 3g00944645

Typical front view of the radiator fans




Illustration 4g00944649

Typical view of the mounting for the spider

(3) Torque for the two bolts that hold the spiders and adapters onto the fan drive motors ... 240 ± 40 N·m (177 ± 30 lb ft)

(4) Torque for the 16 bolts on the adapter on the front of the spiders ... 105 ± 20 N·m (77 ± 15 lb ft)

(5) Torque for the 16 bolts on the adapter on the back of the spiders ... 60 ± 12 N·m (44 ± 9 lb ft)

Note: The left fan rotates counterclockwise and the right fan rotates clockwise. The fans rotate in opposite direction in order to obtain the best airflow.

Table 1
Maximum Fan Speeds    
Engine Speed     Idle     Fan Speed    
1960 rpm     High     625 rpm    
1750 rpm     Rated     560 rpm    
1600 rpm     Low Rated     555 rpm    

The minimum fan speed is close to zero.

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