349E, 349F and 352F Excavators and 349E MHPU Mobile Hydraulic Power Unit Tool Control System Caterpillar

Note: The adjustment procedures assume that each electronic component was calibrated correctly. If the component was not calibrated, the adjustment procedures may not work.

Reference: Refer to Testing and Adjusting, "Work Tool Parameter - Program" for additional programming instructions and parameter descriptions.

Speed of the work tool is fast during a single operation

The following adjustments can be performed.

1. Pump flow to the work tool may need adjustment.

   1. The appropriate flow setting for the work tool may be too high. Decrease the value of the following parameter until the desired work tool speed is met.

      "Atch #1 Flow Setting" (Parameter # 27) - XXX [L/min]

2. Spool shift pressure for the attachment control valve may need adjustment for a single operation.

   1. The value of this parameter may be too high. Decrease the value of the following parameters until the desired work tool speed is met.

      "Atch #X Max Ext Press" (Parameter #30, #40, and #50) - XXXX [kPa]

      "Atch #X Max Ret Press" (Parameter #31, #41, and #51) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

Speed of the work tool is fast during a multiple operation

The following adjustments can be performed when the speed of the work tool is fast while operated along with a boom, stick, bucket, swing, or travel function.

1. Pump flow to the work tool during multiple operations may need adjustment.

   1. The multiple operation flow setting for the work tool may be too high. Decrease the value of the following parameter until the desired work tool speed is met.

      "Atch #1 Multi-Ope Add Flow" (Parameter # 28) - XXX [L/min]

2. Spool shift pressure for the attachment control valve may need adjustment for a multiple operation.

   1. The value of this parameter may be too high. Decrease the value of the following parameters until the desired work tool speed is met.

      "Atch #X M-Ope Max Ext Press" (Parameter #32 and #42) - XXXX [kPa]

      "Atch #X M-Ope Max Ret Press" (Parameter #33 and #43) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

3. The parameter values for the enhanced multiple operation may need adjustment.

   Note: This parameter setting is only available when "Multi Ope Atch Valve Limit" (Parameter # 14) is Enabled.

   Note: This adjustment procedure is effective for only multiple operation with Boom UP, Stick OUT, and Swing.

   1. The parameter values for the enhanced multiple operation may be too high. Decrease the value of the following parameters until the desired work tool speed is met.

      "Single Mode Max Ext Press" (Parameter #15) - XXXX [kPa]

      Set this parameter within the following range.

      • "Single Mode Max Ext Press" (Parameter #15) greater than or equal to "Atch #X M-Ope Max Ext" (Parameter #30 and #40)

      • "Single Mode Max Ext Press" (Parameter #15) less than or equal to "Atch #X M-Ope Max Ext" (Parameter #32 and #42)

      "Single Mode Max Ret Press" (Parameter #16) - XXXX [kPa]

      Set this parameter within the following range.

      • "Single Mode Max Ret Press" (Parameter #16) greater than or equal to "Atch #X M-Ope Max Ext" (Parameter #31 and #41)

      • "Single Mode Max Ret Press" (Parameter #16) less than or equal to "Atch #X M-Ope Max Ext" (Parameter #33 and #43)

Speed of the work tool is slow during a single operation

The following adjustments can be performed.

1. Pump flow to the work tool may need adjustment.

   1. The appropriate flow setting for the work tool may be too low. Increase the value of the following parameter until the desired work tool speed is met.

      "Atch #1 Flow Setting" (Parameter # 27) - XXX [L/min]

      Note: Pump flow to the work tool may exceed the upper limit flow when increasing the flow for single operation.

2. Spool shift pressure for the attachment control valve may need adjustment for a single operation.

   1. The value of this parameter may be too low. Increase the value of the following parameters until the desired work tool speed is met.

      "Atch #X Max Ext Press" (Parameter #30, #40, and #50) - XXXX [kPa]

      "Atch #X Max Ret Press" (Parameter #31, #41, and #51) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

Speed of the work tool is slow during a multiple operation

The following adjustments can be performed when the speed of the work tool is slow while operated along with a boom, stick, bucket, swing, or travel function.

1. Pump flow to the work tool during multiple operations may need adjustment.

   1. The multiple operation flow setting for the work tool may be too low. Increase the value of the following parameter until the desired work tool speed is met.

      "Atch #1 Multi-Ope Add Flow" (Parameter # 28) - XXX [L/min]

2. Spool shift pressure for the attachment control valve may need adjustment for a multiple operation.

   1. The value of this parameter may be too low. Increase the value of the following parameters until the desired work tool speed is met.

      "Atch #X M-Ope Max Ext Press" (Parameter #32 and #42) - XXXX [kPa]

      "Atch #X M-Ope Max Ret Press" (Parameter #33 and #43) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

3. The parameter values for the enhanced multiple operation may need adjustment.

   Note: This parameter setting is only available when "Multi Ope Atch Valve Limit" (Parameter # 14) is Enabled.

   Note: This adjustment procedure is effective for only multiple operation with Boom UP, Stick OUT, and Swing.

   1. The parameter values for the enhanced multiple operation may be too low. Increase the value of the following parameters until the desired work tool speed is met.

      "Single Mode Max Ext Press" (Parameter #15) - XXXX [kPa]

      Set this parameter within the following range.

      • "Single Mode Max Ext Press" (Parameter #15) greater than or equal to "Atch #X M-Ope Max Ext" (Parameter #30 and #40)

      • "Single Mode Max Ext Press" (Parameter #15) less than or equal to "Atch #X M-Ope Max Ext" (Parameter #32 and #42)

      "Single Mode Max Ret Press" (Parameter #16) - XXXX [kPa]

      Set this parameter within the following range.

      • "Single Mode Max Ret Press" (Parameter #16) greater than or equal to "Atch #X M-Ope Max Ext" (Parameter #31 and #41)

      • "Single Mode Max Ret Press" (Parameter #16) less than or equal to "Atch #X M-Ope Max Ext" (Parameter #33 and #43)

Speed of the machine or implement movement is slow during a work tool operation

The following adjustments can be performed when the speed of a boom, stick, bucket, swing, or travel function is slow while operated along with the work tool.

1. Pump flow to the work tool during multiple operations may need adjustment.

   1. The multiple operation flow setting for the work tool may be too low. Increase the value of the following parameter until the desired work tool speed is met.

      "Atch #1 Multi-Ope Add Flow" (Parameter # 28) - XXX [L/min]

      Note: Pump flow to the work tool may exceed the upper limit flow set (Parameter #27) when setting additional flow for multiple operation.

2. Spool shift pressure for the attachment control valve may need adjustment for a multiple operation.

   1. The value of this parameter may be too low. Increase the value of the following parameters until the desired work tool speed is met.

      "Atch #X M-Ope Max Ext Press" (Parameter #32 and #42) - XXXX [kPa]

      "Atch #X M-Ope Max Ret Press" (Parameter #33 and #43) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

Machine vibration is excessive during start and stop of work tool operation

The response time for the work tool may need adjustment.

1. The value of this parameter may be too low. Increase the value of the following parameters.

   "Atch #X Open Time" (Parameter #34 and #44) - XX [sec]

   "Atch #X Close Time" (Parameter #35 and #45) - XX [sec]

   Note: For reference, this parameter is set to 0.5 or less.

Speed of Boom DOWN operation is fast

The following adjustments can be performed for the 349 through 320 size machines.

1. Spool shift pressure for the boom control valve may need adjustment.

   1. This parameter adjusts the maximum speed of Boom DOWN. Decreasing this value will lower the maximum speed of Boom DOWN.

      "BM Cyl Ret Spd Limit Max" (Parameter # 22) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

   2. The value of this parameter determines the starting pressure for limiting the amount the spool will shift for the boom control valve. If this value is set too low, the speed of the boom will be restricted while the joystick movement is a small amount. If this value is set too high, the speed of the boom will be restricted while the joystick movement is a larger amount.

      "BM Cyl Ret Spd Limit Start" (Parameter # 21) - XXXX [kPa]

      Note: To slow the Boom DOWN operation to allow for a fine movement, adjust the value to the range of 500 kPa to 800 kPa.

      Note: This parameter is enabled only when the value set for "BM Cyl Ret Spd Limit Start" (Parameter # 21) is less than or equal to the value "BM Cyl Ret Spd Limit Max" (Parameter # 22). This parameter may not be necessary to set unless the upper limit of the speed is desired to be set.

Speed of Stick IN operation is fast

The following adjustments can be performed for the 349 through 320 size machines.

1. Spool shift pressure for the stick control valve may need adjustment.

   1. This parameter adjusts the maximum speed of Stick IN. Decreasing this value will lower the maximum speed of Stick IN.

      "ST Cyl Ext Spd Limit Max" (Parameter # 24) - XXXX [kPa]

      Note: For reference, this parameter is set within the range of 800 kPa to 2000 kPa.

   2. The value of this parameter determines the starting pressure for limiting the amount the spool will shift for the stick control valve. If this value is set too low, the speed of the stick will be restricted while the joystick movement is a small amount. If this value is set too high, the speed of the stick will be restricted while the joystick movement is a larger amount.

      "ST Cyl Ext Spd Limit Start" (Parameter # 23) - XXXX [kPa]

      Note: To slow the Stick IN operation to allow for a fine movement, adjust the value to the range of 500 kPa to 800 kPa.

      Note: This parameter is enabled only when the value set for "ST Cyl Ext Spd Limit Start" (Parameter # 23) is less than or equal to the value "ST Cyl Ext Spd Limit Max" (Parameter # 24). This parameter may not be necessary to set unless the upper limit of the speed is desired to be set.