Note: Before you perform this test, the condition of fuse (5), which is located on the variable frequency controller (1) should be verified.
Illustration 60 Control Console
(1) Variable frequency controller. (5) Fuse.
WARNING
Personal injury or death can result from sudden machine movement.
Sudden movement of the machine can cause in
jury to persons on or near the machine.
To prevent injury or death, make sure that the area around the machine is clear of personnel and ob
structions before operating the machine.
NOTICE
To avoid damage to the vibratory system during test
ing, always perform the testing with the vibratory drum on top of tires or on loose dirt. Tires will simulate a non-compacted soil condi tion.
Never operate the vibratory system when the machine is on concrete.
Required Tools 6V-7070 Digital Multimeter (or equivalent) Fabricated Wiring Harness
1 1
Testing and Adjusting Section
Illustration 61
Variable Frequency Controller
(2) Wire terminal 1. (3) Wire terminal 7. (4) Wire terminal 8. (6) Frame ground wire terminal 2.
1. Apply the parking brake. Place the propel control lever in the STOP position. Put the vibratory control switch on the propel control lever in the OFF position.
2. Remove the cover from the operator console in order to access variable frequency controller (1).
3. Turn the key start switch to the ON position. Do not start the engine.
4. Use 6V-7070 Digital Multimeter in order to check the input voltage between wire terminal 1 (2) and frame ground wire terminal 2 (6). The input voltage should be a minimum of 24 DCV.
5. Use the multimeter to check the reference voltage between wire terminal 7 (3) and frame ground wire terminal 2 (6) on the variable frequency controller. The voltage should be 5.1 DCV.
6. Use the multimeter to check the reference voltage between wire terminal 8 (4) and frame ground wire terminal 2 (6) on the variable frequency controller. The voltage should be 2.55 DCV.
7. If the reference voltage that is measured at wire terminal 7 (3) and 8 (4) is not correct, and there is a minimum of 24 DCV at wire terminal 1 (2), then a problem exists with the voltage regulator for the variable frequency controller.
If the reference voltages that are measured at wire terminals 7 (3) and 8 (4) are correct, and there is a minimum of 24 DCV at wire terminal 1 (2), then perform Testing and Adjusting Controller in the section that follows.
Controller
Testing and Adjusting Section operational test of the variable frequency controller.
1. Apply the parking brake and place the propel control lever in the STOP position. Stop the engine. Turn the key start switch to the ON position. Put the throttle switch in the HIGH position. Put the propel range switch in the LOW position.
(1) Vibratory control dial. (2) Vibratory on/off control switch. (3) Vibratory amplitude control.
6. Place the vibratory amplitude control (3) in the HIGH AMPLITUDE position.
7. Turn vibratory control dial (1) to the full
counterclockwise position (minimum frequency).
8. Depress vibratory on/off control switch (2) in order to supply current to the vibratory system.
9. The nominal amperage that is measured for high amplitude-minimum frequency is 450 mA.
3. Disconnect the main wiring harness from the electrical connectors for the vibratory pump.
. Assemble the fabricated wiring harness. Refer to the illustration and the charts that are provided for specific details. Install the fabricated wiring harness in the main harness.
Note: The amperage reading which is given during the procedure may be used to predetermine the vibration frequency values for the Variable Frequency - Test.
Note: In order to obtain the correct readings, the nominal amperage values for the minimum frequency settings should be checked and adjusted before doing the maximum frequency settings.
Illustration 64
Variable Frequency Controller (4) Variable frequency controller.
4. Connect the 6V-7070 Digital Multimeter to item 2 on the fabricated wiring harness so that the amperage reading and the high amplitude solenoid may be measured.
5. Select the correct amperage range on the multimeter. The range of milliamperes which may be measured is 400 to 1200 mA.
Illustration 65 g00474697 Variable Frequency Controller
(4) Variable frequency controller. (5) "P5" Low amplitude-minimum frequency potentiometer. (6) "P6" High amplitude-minimum frequency potentiometer. (7) "P3" Low amplitude-maximum frequency potentiometer. (8) "P4" High amplitude-maximum frequency potentiometer.
10. If the nominal amperage that is measured for high amplitude-minimum frequency is not 450 mA, potentiometer (6) must be adjusted. Depress the vibratory on/off control switch (2) in order to stop current flow to the vibratory system.
11. Keep vibratory amplitude control (3) in the HIGH AMPLITUDE position.
12. Turn vibratory control dial (1) to the full clockwise position (maximum frequency).
13. Depress vibratory on/off control switch (2) in order to supply current to the vibratory system.
14. The nominal amperage that is measured for high amplitude-maximum frequency is 520 mA.
15. If the nominal amperage that is measured for high amplitude-maximum frequency is not 520 mA, adjust potentiometer (8). Depress the vibratory on/off control switch (2) in order to stop current flow to the vibratory system.
Note: After the nominal amperage for the high amplitude-maximum frequency has been adjusted, repeat Steps 6 through 10 in order to verify that the nominal amperage for the high amplitude-minimum frequency has not changed.
17. Connect the 6V-7070 Digital Multimeter to item 1 on the fabricated wiring harness so that the amplitude-minimum frequency is 450 mA.
21. If the nominal amperage that is measured for low amplitude-minimum frequency is not 450 mA, adjust potentiometer (5). Depress the vibratory on/off control switch (2) in order to stop current flow to the vibratory system.
22. Keep the vibratory amplitude control (3) in the LOW AMPLITUDE position.
23. Turn vibratory control dial (1) to the full clockwise position (maximum frequency). for low amplitude-maximum frequency is not 520 mA, adjust potentiometer (7). Depress the vibratory ON/OFF control switch (2) in order to stop current flow to the vibratory system.
Note: After the nominal amperage for the low amplitude-maximum frequency has been adjusted, repeat Steps 16 through 21 in order to verify that the nominal amperage for the low amplitude-minimum frequency has not changed.
Note: After the nominal amperages for the low amplitude maximum frequency and low amplitude minimum frequency have been adjusted, repeat Steps 6 through 15 in order to verify that the nominal amperages for the high amplitude-maximum
frequency and high amplitude-minimum frequency have not changed.
Note: After you perform this procedure, perform the Variable Frequency - Test procedure in order to make sure that the vibratory frequencies are correct.
16. Place vibratory amplitude control (3) in the LOW AMPLITUDE position.
Testing and Adjusting Section
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