797 Off-Highway Truck Fan Drive Hydraulic System Caterpillar


Worksheets

Usage:

797 5YW

Table 1
Hydraulic Fan Drive Test    
Machine Model         Today's Date        
Machine Serial Number         Machine Hours        
ECM Flash File         Flash File
Date    
   

Table 2
Hydraulic Fan Control Temperatures    
Temperatures During The Test    
Aftercooler     Jacket Water     Transmission Lube     Torque Converter     Brake     Steering Oil    
                       

Table 3
Hydraulic Fan Speed Override Test    
Fan Override Speed     Actual Fan Speed
At
Low Idle    
Pump Pressure
At
Low Idle    
Actual Fan Speed
At
High Idle    
Pump Pressure
At
High Idle    
None                    
100 rpm                    
200 rpm                    
300 rpm                    
400 rpm                    
500 rpm                    
Disconnect The Solenoid.                    

Table 4
Hydraulic Fan
High Pressure Cut Off    
Engine Speed at Low Idle     Pump Pressure    
       

Table 5
Hydraulic Fan Control
Hot Temperature    
Engine Speed     Coolant Temp
>
88 °C (191 °F)    
TC Temp
>
88 °C (191 °F)    
Desired Fan Speed     Actual Fan Speed     Actual Pump Pressure    
High Idle
Neutral
No Service Brakes    
Actual Temp     Actual Temp                
High Idle
Neutral
Retarder
Engaged    
                   
TC Stall                        

Table 6
Hydraulic Fan Control
Hoist Lever Operation    
Engine Speed     Coolant Temp
>
88 °C (190 °F)    
TC Temp
>
88 °C (190 °F)    
Hoist Lever Position     Desired Fan Speed     Actual Fan Speed    
High Idle
Neutral
No Service Brakes    
Actual Temp     Actual Temp     Raise
or
Lower    
200 rpm        

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