CB7 and CB8 Vibratory Asphalt Compactor Machine Systems Caterpillar


Vibratory Frequency - Test and Adjust - Speed

Usage:

CB7 AT5

------ WARNING! ------

Diesel engine exhaust contains products of combustion which may cause personal injury.

Always start and operate the engine in a well ventilated area, and, if in an enclosed area, vent the exhaust to the outside.


------ WARNING! ------

Personal injury can result from rotating and moving parts. Stay clear of all rotating and moving parts.

Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified.

The machine must be parked on a level surface and the engine stopped.

Attach a "Do Not Operate" or similar warning tag to the start switch and controls before servicing, repairing, or making adjustments to the machine.


------ WARNING! ------

Personal injury or death can result from sudden machine movement.

Sudden movement of the machine can cause injury 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 obstructions before operating the machine.


------ WARNING! ------

Injury to personnel can result if they are not in the operator's view. Allow only essential personnel near the machine, and make sure the personnel are in the operator's view when testing, to prevent injury. Make sure checks are done in an open area.


------ WARNING! ------

To prevent injury or death, never work under a machine while a test is being performed.


Note: The vibratory motor for each drum is equipped with a speed sensor. The following procedure can be used to test any of the sensors.

Note: Park the machine on soft dirt or place tires under the drums. Alternately, the machine can be lifted onto jacks, or the machine drums may be supported by air bags. The weight of the machine is approximately 8720 kg (19224 lb).

Table 1
Required Tools 
Tool  Part Number  Description  Qty 
146-4080  Digital Multimeter Gp 
7X-1710  Multimeter Probe 
N/A  Stopwatch 
N/A  Laptop Computer with PLus1+TM Software 
E(1)  317-7485  Communication Adapter 
F(1)  370-4617  Cable As 
G(1)  457-6114  Cable As 
(1) Tool (E), Tool (F), and Tool (G) are part of the 466-6258 Communication Adapter Gp.

  1. Drive the machine to a smooth, horizontal surface.


    Illustration 1g06160408

  2. Move propel lever (1) to the NEUTRAL position.

  3. Move parking brake switch (2) to the ON position.

  4. Place the engine in ECO mode or low idle.


      Illustration 2g06148038

    1. Select "Main Menu" (3) on the machine display.

    2. Select "Machine Setup" (4).


      Illustration 3g06148261

    3. Select "Engine Spd Sw" (5).


      Illustration 4g06148286

    4. Select "ECO" (6) or "Low" (7).


    Illustration 5g06160422

  5. Move engine start switch (8) to the OFF position.


    Illustration 6g06163006

  6. Connect Tool (F) and Tool (G) to Tool (E). Connect Tool (G) to diagnostic connector (9). Connect Tool (F) to USB port on Tool (D).


    Illustration 7g06163699


    Illustration 8g06163701

    Note: Both drums have vibratory speed sensors on each vibratory motor.

  7. Locate vibratory speed sensor connector (10) for the drum being tested. Do not disconnect the connector.

  8. Insert black spoon from Tool (B) into pin "2" of the connector. Insert red spoon from Tool (B) into pin "3" of the connector.

  9. Connect Tool (B) to Tool (A). Set Tool (A) to measure frequency.

  10. Move engine start switch (8) to the START position. Release the switch when the engine starts.

  11. Place the engine in ECO mode.

  12. Move parking brake switch (2) to the OFF position.

  13. Set the vibratory system in the manual mode.


      Illustration 9g06151040

    1. Select "Main Menu" (11) on the machine display.

    2. Select "Machine Setup" (12).


      Illustration 10g06151041

    3. Select "Vibe Turn On Speed" (13).


      Illustration 11g06151042

    4. Select "Manual" mode (14).


    Illustration 12g06160871

  14. Use drum select switch (15) to select both drums.

    Note: Two things indicate when the machine is in both drums mode. First, "Vibe Drum Select Dual" will appear on the display. Second, both LEDs next to drum select switch (15) will be illuminated.

  15. Launch the Plus+1TM program on the computer to enable the vibe test mode.

    Note: First-time users need to perform the tasks in the Communication and Connections Wizard. This wizard allows the Windows® operating system to recognize the USB device. Follow the on-screen instructions.



    Illustration 13g06152006

  16. Click "Status" icon (16).

  17. Check for "Active Codes". Clear any open "Active Codes".

  18. Click "Machine Control" (17).


    Illustration 14g06152012

  19. Click "Hydraulics" (18).

  20. Click "Vibe Test Mode" (19).


    Illustration 15g06152015

  21. Click "Enable" icon (20) to enable the "Normal Vibe Test Mode".

  22. When "Normal Vibe Test Mode" is in "Enabled" mode, the Plus+1TM program is launched.


    Illustration 16g06152019
    Standard propel control lever


    Illustration 17g06163733
    Optional propel control lever

  23. Press vibratory control switch (21) on the propel control lever. Hold the vibratory control switch down for 2 seconds to activate the vibratory system.

  24. Read frequency shown on Tool (A).

  25. Press vibratory control switch (21) to shut off the vibratory system.

  26. Move parking brake switch (2) to the ON position.

  27. Move engine start switch (8) to the OFF position.

  28. Multiply frequency measured in Step 24 by 1.25. Refer to Table 2 for the correct VPM for your machine. Compare this value to frequency measured by Tool (A). The values should match within ± 50 vpm.

    Table 2
    Drum Style  Low Frequency/High Amplitude  High Frequency/Low Amplitude  High Frequency/High Amplitude  Single Frequency 
    Split With Two Amplitudes, Two Frequencies  2520 vpm  3200 vpm  N/A  N/A 
    Solid With Two Amplitudes, Three Frequencies  2700 vpm  3420 vpm  3200 VPM  N/A 
    Solid With Two Amplitudes, Two Frequencies  3200 vpm  3800 vpm  N/A  N/A 
    Solid With One Frequency  N/A  N/A  N/A  3200 vpm 

  29. If the vibratory speed sensor is not functioning properly or shows no signal, clean, repair, or replace the vibratory speed sensor and retest. Go to Step 8. If the vibratory speed sensor is functioning properly, remove the tooling and lower the machine to the ground.

    Note: The speed sensors can alternately be tested with the service tool software.

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