MOTOR GP- 6V0516 - Caterpillar

Table 1
Required Tools    
Part Number    Description    Required Amount    
4C-9437     Hydraulic Flow Tester     1    This test is designed to determine if a pump is operating within the designed parameters.For any pump test at a given rpm, the pump flow at 690 kPa (100 psi) will be larger than the pump flow at 6900 kPa (1000 psi).The difference between the pump flow of the two operating pressures is the flow loss.Flow loss is used as a measure of pump performance when the flow loss is expressed as a percent of pump flow.
Table 2
Percent flow loss    
[(A - B) ÷ C] × 100 = D    
A     Pump flow at
690 kPa (100 psi)    
B     Pump flow at
6900 kPa (1000 psi)    
C     Pump flow at
690 kPa (100 psi)    
D     Percent flow loss    
Table 3
Example    
[(A - B) ÷ C] × 100 = D    
A    
217.6 L/min (57.5 US gpm)    
B    
196.8 L/min (52.0 US gpm)    
C    
217.6 L/min (57.5 US gpm)    
D     Percent of flow loss    
[(217.6 L/min (57.5 US gpm) - 196.8 L/min (52.0 US gpm)) ÷ 217.6 L/min (57.5 US gpm)] × 100 = D    
D = 9.6 percent    If the percent of loss is more than 10 percent for the machine test or 15 percent for the bench test, the pump performance is not good enough.Note: The numbers in the formula are only examples. These numbers are not values for any specific pump nor for any particular pump condition. See the Specifications for the pump flow of a new pump at 690 kPa (100 psi) and at 6900 kPa (1000 psi).Machine Test
Install a 4C-9437 Hydraulic Flow Tester .
Start the engine.
Run the engine at high idle.
Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi).
Use the values that were measured in Step 4 in Table 2.Bench Test
If the bench test can be run at 6900 kPa (1000 psi) and at full rpm, determine the percent flow loss.If the bench test cannot be run at 6900 kPa (1000 psi) and at full rpm, use the following procedure:
Run the pump shaft at 1000 rpm.
Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi).
Use the measurements from Step 2 for the values of A and B in Table 2.
To determine the value of C, use Steps 4.a through 4.b.
Run the pump shaft at 2000 rpm.
Measure the pump flow at 690 kPa (100 psi).
Use the measurement from Step 4.b for the value of C in Table 2.