69D and 769D Off-Highway Trucks and 771D Quarry Truck Steering System Caterpillar


Worksheets

Usage:

69D 9XS

Table 1
Model of the Machine         Date        
Serial Number         Service Meter Hours        
Technician        

Table 2
Visual Checks    
Oil level         Air or water in the oil        
Oil viscosity         Debris in the suction screen        
Oil leaks         Debris in the filter        
Component damage        

Table 3
Test     Specifications     Actual    
Cutoff Pressure (Pressure Compensator Valve)    
23500 ± 350 kPa (3410 ± 50 psi)    
   
Low Pressure Standby (Pressure Compensator Valve)    
3275 to 4800 kPa (460 to 695 psi)    
   
Primary Steering Backup Relief Valve    
26000 ± 400 kPa (3771 ± 58 psi)    
   
Secondary Steering Backup Relief Valve    
20700 ± 400 kPa (3002 ± 58 psi)    
   
Secondary Steering Main Relief Valve    
17225 ± 350 kPa (2500 ± 50 psi)    
   
Pressure Reducing Valve    
2600 + 500 - 200 kPa (377 + 73 - 30 psi)    
   
Steering Cylinder Relief Valves    
27200 kPa (3945 psi)    
   

Caterpillar Information System:

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120H and 135H Motor Graders Hydraulic System Oil - Change
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