This function allows the current to the proportional reducing valve to change at a specific rate. This function is used to confirm the activation of the proportional reducing valve.
| Required Tools |
| 146-4080 Digital Multimeter |
| 6V-2100 Multitach Group |
| 188-8588 Test Harness |
|
|
|
|
|
|
| Illustration 1 | g00778727 |
|
Illustration for 312C |
|
|
|
|
|
|
|
| Illustration 2 | g00778728 |
|
Illustration for 315C |
|
|
|
|
|
|
|
| Illustration 3 | g00986691 |
|
Illustration for 321C |
|
|
|
|
|
|
|
| Illustration 4 | g00690109 |
|
Illustration for 319C, 320C series, 322C, 325C, and 330C (1) Power shift pressure solenoid (2) Tap for the power shift pressure |
|
- Stop the engine. Disconnect connector “39” of the proportional reducing valve and connect the test harness to connector “39”.
- Install the test leads of the multimeter.
- Install a 4900 kPa (710 psi) pressure gauge to the tap (2) .
- Place the backup switch to the “AUT” position.
- Set the engine speed dial to the position of 10.
- Allow the hydraulic oil to warm to a temperature of 50 °C (122 °F).
- Ensure that all control levers are in the neutral position.
- Enter the service mode. Select the sweep test for the power shift pressure. Perform the device test for “PS PRV-SWEEP”.
- The display on the multimeter should show a wave from 0.2 amperes to 0.75 amperes within a period of 20 seconds. The pressure gauge should show a cycle of pressure from 482 kPa (70 psi) to 3447 kPa (500 psi) during the identical time of the wave of the ampere.
- Verify that the current and the pressure are showing the correct parameters.