COUPLING KIT 2947823 - Caterpillar

Table 2
Method of determining flow loss
Pump flow at 690 kPa (100 psi)
− Pump flow at 6900 kPa (1000 psi)
Flow loss
Table 3
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 4
Method of determining percent of flow loss
Flow loss (L/min or US gpm) × 100 = Percent of flow loss
Pump flow at 690 kPa (100 psi)
Table 5
Example of determining percent of flow loss
20.8 L (5.5 US gal) × 100 = 9.5%
217.6 L/min (57.5 US gpm) Test Preparation
Illustration 2 g03025076
Steering frame lock installed
(1) Steering frame lock
Install steering frame lock (1). Refer to Operation and Maintenance Manual, "Steering Frame Lock" for the machine being serviced. Test Procedure
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 6.
Table 6
Pump flow at 690 kPa (100 psi)
− Pump flow at 6900 kPa (1000 psi) × 100 = Percent of flow loss
Pump 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 6 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 7. For the bottom part of the formula, run the pump shaft at 2000 rpm. Measure the pump flow at 690 kPa (100 psi).
Table 7
Pump flow at 690 kPa (100 psi)
− Pump flow at 6900 kPa (1000 psi) × 100 = Percent of flow loss
Pump flow at 690 kPa (100 psi) and at 2000 rpm Test Procedure
Bench Test
If the test bench can be run at 6900 kPa (1000 psi) and at full pump rpm, use the formula in Table 8 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 2. For the bottom part of the formula, run the pump shaft at 2000 rpm. Measure the pump flow at 690 kPa (100 psi).
Table 8
Pump flow at 690 kPa (100 psi)
− Pump flow at 6900 kPa (1000 psi) × 100 = Percent of flow loss
Pump flow at 690 kPa (100 psi) and at 2000 rpm