HARNESS AS-CHASSIS 2427389 - Caterpillar

Table 1
Method of determining flow loss    
    Pump flow at
690 kPa (100 psi)    
-     Pump flow at
6900 kPa (1000 psi)    
    Flow loss    
Table 2
Example of determining flow loss    
   
217.6 L/min (57.5 US gpm)    
-    
196.8 L/min (52.0 US gpm)    
   
20.8 L/min (5.5 US gpm)    Flow loss that is expressed as a percentage of pump flow is used as a measure of pump performance.
Table 3
Method of determining percent of flow loss    
Flow loss (L/min or US gpm)     X     100     =     % Loss    
Flow at
690 kPa (100 psi)    
Table 4
Method of determining percent of flow loss    
20.8 L/min (5.5 US gpm)     X     100     =     9.5% Loss    
217.6 L/min (57.5 US gpm)    Machine Test
Install a flow meter. Run the engine at high idle. Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi). Use these values in the formula in Table 5.
Table 5
-     Flow at
6900 kPa (1000 psi)     ×     100     =     % Loss    
    Flow at
690 kPa (100 psi)    Bench Test
If the test bench can be run at 6900 kPa (1000 psi) and at full pump rpm, use the formula in Table 5 to determine the percent of flow loss.If the test bench cannot be run at 6900 kPa (1000 psi) or at full pump rpm, run the pump shaft at 1000 rpm. Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi). Use these values in the top portion of the formula in Table 6. For the bottom part of the formula, run the pump shaft at 2000 rpm. Measure the pump flow at 690 kPa (100 psi).
Table 6
-     Flow at
6900 kPa (1000 psi)     ×     100     =     % Loss    
    Flow at
690 kPa (100 psi) and 2000 rpm    Reference: For more information about the implement pump, refer to the Service Manual module Specifications, RENR6036, " 824G Series II Wheel Tractor, 825G Series II Soil Compactor, and 826G Series II Landfill Compactor Electrohydraulic System". The 824G II Wheel Loader and the 826G II Landfill Compactor are equipped with a 184-3123 Vane Pump. The 825G II Soil Compactor is equipped with a 184-3122 Vane Pump .