ANGLE 1G6017 - Caterpillar

Start the engine.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Illustration 9 g03678048
Monitor
(A) Keypad guidance area
(B) Cancel key
(C) OK key
(D) Home key
(E) Left key
(F) Up key
(G) Down key
(H) Right key
(J) Enter key Note: Perform each test for both of the fixed power shift pressures one pump at a time.
Enter the service mode on the monitor and input a fixed power shift pressure. Refer to Table 1 and Table 2 for the fixed power shift pressures.
Input the password "9992".
Select "Override Parameters".
Override "Power Shift Pressure" to the fixed setting. For the first specification refer to Table 1, and for the second specification refer to Table 2.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
When "Power Shift Pressure" is highlighted, press OK key (C).
Illustration 10 g03678184
Once "Power Shift Pressure" is selected, press up key (F) or down key (G) in order to increase or decrease the numeric value that is displayed on the monitor display. Pressing down key (G) decreases the power shift pressure. Pressing up key (F) increases the power shift pressure. Refer to Illustration 9 for monitor controls.
Set "Power Shift Pressure" to fixed setting, then press OK key (C). Refer to Illustration 10. Note: The value for power shift pressure on the monitor may not always match the pressure reading on the pressure gauge. Adjust the value on the monitor until the desired power shift pressure is attained on the pressure gauge that is connected to the pressure tap for power shift pressure. For the first specification refer to Table 1, the actual power shift pressure must be 3200 kPa (464 psi) on the pressure gauge. For the second specification refer to Table 2, the actual power shift pressure must be 3920 kPa (568 psi) on the pressure gauge.Note: To prevent a change in power shift pressure during the negative flow control pressure testing, do not exit the "Override Parameters" screen and do not turn the engine start switch to the OFF position.Note: Refer to System Operation, "Monitoring System" for additional information on Service Mode.
Illustration 11 g00670500
Portable hydraulic tester (flow meter)
(10) Portable hydraulic tester (flow meter)
(22) Multitach
(26) Valve
Turn valve (26) on portable hydraulic tester (10) clockwise until the pump delivery pressure is 7000 kPa (1015 psi).
Record the negative flow rate in Tables. 1,2
Illustration 12 g03292776
Pressure/Flow characteristic curve
Table 1
Negative Flow Control
Power Shift Pressure 3200 kPa (464 psi)
Oil Temperature °C (°F) Drive pump
Idler pump
Engine speed (rpm) Drive pump
Idler pump
Flow measured liter/min (US gpm) Drive pump
Idler pump
Flow corrected liter/min (US gpm) Drive pump
Idler pump
Specification for negative flow rate liter/min (US gpm) New 50 10 (13 2.6)
Table 2
Negative Flow Control
Power Shift Pressure 3920 kPa (568 psi)
Oil Temperature °C (°F) Drive pump
Idler pump
Engine speed (rpm) Drive pump
Idler pump
Flow measured liter/min (US gpm) Drive pump
Idler pump
Flow corrected liter/min (US gpm) Drive pump
Idler pump
Specification for negative flow rate liter/min (US gpm) New 28 5 (7 1.3) Note: Specifications for