HOSE 5A5260 - Caterpillar

Note: Specifications for output flow rates are based on an engine speed of 1800 rpm. To attain more accurate test results, measured flow should be corrected with the following calculation.
Table 4
Corrected flow = Measured flow x 1800 rpm
measured rpm Note: Specifications for output flow rates are based on a power shift pressure at the pump of 2300 50 kPa (335 7.5 psi). The output flow rate changes approximately 1.8 L/min (0.5 US gpm) for each 100 kPa (14 psi) of power shift pressure in the lower range of the constant horsepower control. The output flow rate changes approximately 0.8 L/min (0.2 US gpm) for each 100 kPa (14 psi) of power shift pressure in the higher range of the constant horsepower control.
Illustration 12 g03251696
P-Q characteristic curve
Table 5
312D2 GC
Pump Flow Test
Engine Speed 1654 RPM
Power shift Pressure 2200 kpa Measuring Points
9800 kPa (1421 psi) 15700 kPa (2277 psi) 19600 kPa (2857 psi) 25500 kPa (3698 psi) 29400 kPa (4264 psi)
Flow measured liter/min (US gpm) Drive Pump
Idler Pump
Oil temperature °C (°F)
Engine speed (rpm)
Flow corrected liter/min (US gpm) Drive Pump
Idler Pump
Specification for flow rate liter/min (US gpm) New 110 12 (29 3.2) 93 14 (24 3.7) 77 17 (20 4.5) 60 13 (15 3.4) 54 12 (14 3.2) Note: Specifications for output flow rates are based on an engine speed of 1654 rpm. To attain more accurate test results, measured flow should be corrected with the following calculation.
Table 6
Corrected flow = Measured flow x 1800 rpm
measured rpm Note: Specifications for output flow rates are based on a power shift pressure at the pump of 2200 50 kPa (319 7.5 psi). The output flow rate changes approximately 1.8 L/min (0.5 US gpm) for each 100 kPa (14 psi) of power shift pressure in the lower range of the constant horsepower control. The output flow rate changes approximately 0.8 L/min (0.2 US gpm) for each 100 kPa (14 psi) of power shift pressure in the higher range of the constant horsepower control.Note: If the output flow rate of the pump is not within the specification, disconnect the negative flow control line from the pump that is being tested and perform the test again.Note: Flow measurements must be done only during pressure rise.