Proportional Hydraulic Modulation Valves (PHMV) control the oil flow from the front pump and rear pump to the implement and swing functions. The P-C PHMV can be adjusted to improve controllability during implement and swing multi-operation functions. Use the following procedure to adjust implement and swing velocity settings.
The flow balance adjustment can be adjusted by the monitor or Cat Electronic Technician (2015B or newer)
There are two types of flow balance adjustment:
- Operator Menu adjustment for the Boom raise versus Swing balance.
- Dealer Service Menu adjustment for Boom raise, Boom lower, Stick in, Stick out, Bucket open, and Bucket close versus Swing balance.
- Testing and Adjusting, "Main Control Valve - Calibrate"
- Start the Engine.
- Increase the hydraulic oil temperature to
55° ± 5°C (131° ± 9°F) .
| Controllability Setting | |||
| Monitor Selection | Swing Gain Adjust Value | Boom Gain Adjust Value | Description |
| Swing Priority 9 | 0 | -14 | Increases swing speed by reducing boom up gain value. |
| Swing Priority 8 | 0 | -13 | |
| Swing Priority 7 | 0 | -12 | |
| Swing Priority 6 | 0 | -11 | |
| Swing Priority 5 | 0 | -10 | |
| Swing Priority 4 | 0 | -8 | |
| Swing Priority 3 | 0 | -6 | |
| Swing Priority 2 | 0 | -4 | |
| Swing Priority 1 | 0 | -2 | |
| Normal | 0 | 0 | Default Setting |
| Boom Priority 1 | -2 | 0 | Increases boom up speed by reducing swing velocity gain value. |
| Boom Priority 2 | -4 | 0 | |
| Boom Priority 3 | -6 | 0 | |
| Boom Priority 4 | -8 | 0 | |
| Boom Priority 5 | -10 | 0 | |
| Boom Priority 6 | -11 | 0 | |
| Boom Priority 7 | -12 | 0 | |
| Boom Priority 8 | -13 | 0 | |
| Boom Priority 9 | -14 | 0 | |
Note: The default value for the "Boom Swing Priority Feature" is "Enable".
- Enable the Controllability Setting Icon.
- Enter the "Service" menu
- Enter password "9992"
- Select "Configurations"
- Select "Controllability Setting"
- Select "Boom Swing Priority" and set the value to "Enable"
- Return to the home screen and select the "Main Menu"
Show/hide table
Illustration 1 g03844634 - Select the "Controllability Setting" icon.
Show/hide table
Illustration 2 g03856368 - Select "Boom Swing Priority".
Show/hide table
Illustration 3 g03845098 - Use the Up and Down arrow keys on the monitor to change the "Boom Swing Priority" value. Refer Table 1 for Monitor selections available.
- Press the OK key.
Note: Do not touch any implement levers for 5 seconds.
- After 5 seconds, operate the functions to ensure that the desired cylinder speed and swing speed is met.
- If the desired speed is not met, repeat Step 3 to Step 6 until the desired speed is met.
Dealer Service Menu Adjustment
| Boom and Swing Priority - Adjust | |||||
| Item | Monitor Selection | Cat Electronic Technician (ET) Selection | Value | Default Value | Description |
| Boom Swing Priority Feature | "Boom Swing Priority Feature" | Swing Priority Multi-Function Enable Status | Enabled / Disabled | Enabled | Enables or Disables Boom Swing Priority to the Operator |
| Swing Priority Over Boom Raise | "Bm Up Vel set with SW" | Swing Priority Over Boom Raise Setting | 1 to 20 | 20 | These values can only be changed in the Service Menu of the monitor or Cat ET.
20 is the fastest setting with Swing Multi-Operation. To increase swing speed, lower the value of an implement velocity setting. |
| Swing Priority Over Boom Lower | "Bm Dn Vel set with SW" | Swing Priority Over Boom Lower Setting | 1 to 20 | 20 | |
| Swing Priority Over Stick Out | "Stk Out Vel set with SW" | Swing Priority Over Stick Out Setting | 1 to 20 | 20 | |
| Swing Priority Over Stick In | "Stk In Vel set with SW" | Swing Priority Over Stick In Setting | 1 to 20 | 20 | |
| Swing Priority Over Bucket Open | "Bkt Out Vel set with SW" | Swing Priority Over Bucket Dump Setting | 1 to 20 | 20 | |
| Swing Priority Over Bucket Close | "Bkt In Vel set with SW" | Swing Priority Over Bucket Curl Setting | 1 to 20 | 20 | |
| Swing Velocity Over Multi-Operation | "Sw Vel set with Multi-ope" | Swing Priority Setting | 1 to 20 | 20 | |
Note: Adjusting the implement velocity parameters in the service menu will affect the operator "Boom Swing Priority" operator adjustment.
- Enter the "Service" menu and navigate to the "Controllability Setting".
- Select "Service"
- Enter password "9992"
- Select "Configurations"
- Select "Controllability Setting"
- Adjust the appropriate parameter to satisfy the operator. Reference Table 2 for Monitor selections available.
- Press the OK key.
Note: Do not touch any implement levers for 5 seconds.
- After 5 seconds, operate the functions to ensure that the desired cylinder speed and swing speed is met.
- If the desired speed is not met, repeat Step 2 to Step 4 until the desired speed is met.
| |
| Illustration 4 | g03844971 |
Illustration 4 illustrates how "Boom Priority 5" and "Swing Priority 5" effect the Boom Up and the Swing gain parameters from the "Normal" setting.
- The "Normal" setting has a Boom Up Gain value of 20 and a Swing Gain value of 20.
- The "Boom Priority 5" setting has a Boom Up Gain value of 20 and reduces the Swing Gain value by 10.
- The "Swing Priority 5" setting reduces the Boom Up Gain value by 10 and has a Swing Gain value of 20.
| |
| Illustration 5 | g03845518 |
Illustration 5 illustrates how to make precise adjustments in the "Service" menu.
- The customer requests the dealer to make adjustments in the "Service" menu.
- If all implements are slow then reduce the swing velocity gain value to allow more flow to the implements.
- If the implements are fast then reduce the actuator gain values to reduce the flow to the implements.
| |
| Illustration 6 | g03857614 |
Illustration 6 illustrates a boom up and swing scenario.
The Swing Priority Feature figures boom up and swing gain values from the operator menu selection and service menu selection. "Swing Priority 2" will reduce the boom up gain value by 4, but will not change the swing gain value in the service menu.
The Operator Gain / Response setting is set to soft. The soft setting will change all implement and swing gain values to 14.
The machine will select the minimum value for the final actuator speed limitation gain setting. In this scenario the boom up setting will have a gain value of 11.
Refer to the Operation and Maintenance Manual, "Monitoring System" for more information regarding the Gain Setting.
| |
| Illustration 7 | g03857648 |
Illustration 7 illustrates a boom down and stick in scenario with a tool operation.
The Swing Priority Feature in the service menu selection for boom down with swing gain value is set to 15.
The "Tool Programming" boom down velocity setting is 10.
Note: The "Tool Programming" gain value is 1~10. Add 10 to the value selected in order to figure the final gain value of this parameter.
The Operator Gain / Response setting is set to quick. The quick setting will change all implement and swing gain values to 20.
The machine will select the minimum value for the final actuator speed limitation gain setting. In this scenario the boom down setting will have a gain value of 15.
Refer to the Testing and Adjusting, "Work Tool Parameter - Program" for more information regarding the Tool Programming parameters.
Refer to the Operation and Maintenance Manual, "Monitoring System" for more information regarding the Gain Setting.