The maximum speed of the oil flow to the feed roller arm cylinders is controlled by a stroke limiter screw. The amount of oil flow to the cylinders is controlled by limiting the movement of the valve spool with the stroke limiter screw.
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Personal injury or death can result from escaping fluid under pressure. Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Prepare the machine for testing and adjusting.
Reference: Testing and Adjusting, "Preparation for Troubleshooting"
- Start the engine. Press operating mode switch (2) in order to activate the working mode. Turn engine speed dial (1) until the engine is operating at 1300 rpm. Make sure that the switch for the computer aided bucking system (CABS) is in the ON position.
Note: The cab door must be closed in order to activate the computer aided bucking system (CABS).
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| Illustration 1 | g00777607 |
- Ensure that the hydraulic oil in the system is at normal operating temperature. To warm the hydraulic oil, operate the feed rollers for several minutes.
- Raise the harvester head Approximately 0.3 m (1 ft).
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| Illustration 2 | g00751604 |
Harvester Head in the HORIZONTAL Position | |
- Press toggle switch (4). The feed roller arms will open. Measure the time that is required for the feed roller arms to open.
The speed must meet the following criteria. If the speed does not meet the criteria, perform Step 6 through Step 9 in order to adjust the speed. If the speed meets the criteria proceed to Step 11.
- The measured speed should be between 1.0 second and 1.5 seconds.
- The feed roller arms should not slam the stop at the end of travel. This could cause damage to the frame of the harvester head.
- The measured speed should be between 1.0 second and 1.5 seconds.
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| Illustration 3 | g00801743 |
Locations of Toggle Switches (3) Toggle switch (Grapple CLOSE). (4) Toggle switch (Grapple OPEN). | |
- Lower the harvester head to the ground. Turn the switch for the computer aided bucking system (CABS) to the OFF position. Press the operating mode switch in order to activate the Neutral mode. Stop the engine.
- To change the speed of opening, loosen the locknut on adjustment screw (6). Turn adjustment screw (6) in the counterclockwise direction in order to increase the speed of opening. Turn adjustment screw (6) in the clockwise direction in order to decrease the speed of opening. Tighten the locknut to a torque of 7.9 N·m (70 lb in).
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| Illustration 4 | g00802288 |
Main Control Valve (5) Valve section (Feed roller arm cylinders). (6) Stroke limiter screw (Feed roller arms OPEN). | |
- Start the engine. Press the operator mode switch in order to activate the work mode. Turn the engine speed dial until the engine is operating at 1300 rpm. Turn the switch for the computer aided bucking system (CABS) to the ON position. Raise the harvester head approximately 0.3 m (1 ft).
- Press toggle switch (4). The feed roller arms will open. Measure the time that is required for the feed roller arms to open. The feed roller arms should not slam the stop at the end of travel.
- Repeat Step 6 through Step 9 if the speed is not correct. Proceed to Step 11 if the speed is correct.
- Lower the harvester head to the ground. Turn the switch for the computer aided bucking system (CABS) to the OFF position. Press the operating mode switch in order to activate the Neutral mode. Stop the engine.
Fine Tune the Opening Speed of the Feed Roller Arms with CABSWin
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| Illustration 5 | g00777607 |
- Start the engine. Press operating mode switch (2) in order to activate the working mode. Turn engine speed dial (1) until the engine is operating at 1300 rpm. Make sure that the switch for the computer aided bucking system (CABS) is in the ON position.
- Press toggle switch (3). The feed roller arms will close.
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| Illustration 6 | g00801743 |
Locations of Toggle Switches (3) Toggle switch (Grapple CLOSE). (4) Toggle switch (Grapple OPEN). | |
- Select "Show" (8) and "Settings" (7). The following window will appear.
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| Illustration 7 | g00867939 |
- Select "Machine" (10) and then select "Machine variables" (9). The following window will appear.
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| Illustration 8 | g00867943 |
- Select "Feed Roller Arms" (11) and "Speed" (12) .
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| Illustration 9 | g00802310 |
- Select "Speed For Feed Roller Arms Open (0-255)" (13). The following window will appear.
- The output for this function is turned ON and OFF with button (15). The text on the button reflects the action of the button. The output must be turned ON before any adjustments can begin. LED (14) will light a red color when the output is turned ON.
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| Illustration 10 | g00801884 |
- Select "+" (16) or "-" (17) in order to change the value in small increments. Type the value directly into the keyboard in order to change the value in large increments.
- Turn the output for this function ON and OFF with button (15) until the correct speed is set.
- Select "OK" (18) in order to save the setting.
- Select "Save and Close" (19) .
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| Illustration 11 | g00802317 |
- Lower the harvester head to the ground. Press the operating mode switch in order to activate the Neutral mode. Stop the engine.