CYLINDER GP-THUMB 3056716 - Caterpillar

The chart of seria numbers is based upon how the machine was originally configured from the factory. Earlier machines may have been updated with flashable ECM's. Two methods to check whether the ECM is flashable are by checking the service records (or the P/N on the ECM) and by using the ET service tool to check the serial number on the Implement ECM. When using the ET service tool to check the serial number on the ECM, the end of the serial number contains a two letter suffix. The suffix DB is not flashable and all other suffixes can be flashed. The ECM's which are flashable are, 138-0425,142-3363, 145-1855, 147-5108, 150-4661 and 155-5151 Control Groups.Manual Adjustment Of Start Of Modulation Current To Solenoid Valves
The following steps are not necessary to obtain satisfactory implement control operation. The following steps are provided to give a means to customize or finetune control function for a given application. 1. Connect the 4C-8195 Service Tool to the service connector located behind the fuse access door in the right rear corner of the cab. 2. Operate the machine until the hydraulic oil reaches operating temperature. 3. Enter mode 6 (980G) or mode 7 (824G, 825G, and 826G) for the calibration. Press the "SCROLL" switch until any sub mode of Manual Adjustment of Maximum Modulation Current is displayed. The display will show a number (1 through 6) followed by a dash and three other numbers. An example would be "1-650". 4. Cycle the implement lockout switch ON and OFF one time. This toggles the calibration mode between maximum modulation current and start of modulation current. Any time that a manual adjustment submode is shown, the lockout switch will cause the calibration mode to switch between maximum modulation current and start of modulation current. 5. The start of modulation current is displayed. The format of the display will be "1u###". The three " #" symbols here represent a three digit number. On the actual display the three digit number will be the start of modulation current in milliamperes. The start of modulation current can be increased by momentarily pressing the "CLEAR" switch. Each time the "CLEAR" switch is pressed, the current will immediately increase by 3 or 4 milliamperes. Press and hold the "CLEAR" swich for more than one second and the current reading will scroll quickly until the switch is released. 6. The start of modulation current can be decreased by momentarily pressing the "OPERATOR" switch on the service tool. The operator switch is located on the lower left front dash panel. Each time the "OPERATOR" is pressed the current will immediately decrease 3 or 4 milliamperes. Pressing and holding the "OPERATOR" switch for more than one second and the current reading will scroll quickly until the "OPERATOR" switch is released. 7. Pressing the SCROLL switch while displaying the start of modulation current will cause the next functions start of modulation current to be displayed. Table 10 shows the display and associated adjustable function.