WRENCH GP- 2639038 - Caterpillar

Note: When the Caterpillar Monitoring System is placed in a calibration submode between 15 and 25, the ECM de-energizes the synchronizing solenoid. This closes the synchronizing valve. The ports are blocked.
Illustration 1 g00398786
Switches (1) Service switch. (2) Clear switch. (3) Calibrate switch.
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Main Display Module Of the Caterpillar Monitoring System (4) Transmission system indicator. (5) Display area. (6) diagnostic code indicator "SERV CODE". Service personnel can access the calibration submodes by using the service switches. Calibration mode must be entered first. Then, the calibration submodes are accessible. The Hydrostatic Transmission Electronic Control System provides normal operation until calibration mode (mode 5) is entered. To Enter Calibration Mode (Mode 5)
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Display Area Showing -5- (Calibration Mode).
Press and hold both the "SERVICE" switch (1) and the "CLEAR" switch (2) .
Release the switches when "-5-" is showing in the display area (5) . At this time, transmission system indicator (4) flashes. Calibration mode is active when this indicator turns on. The system now enters the first submode that corresponds to the present engine status. If the engine is off, submode 01 is entered. If the engine is on, submode 15 is entered. To Enter A Submode
Illustration 4 g00402286
Display Area (7) Submode identifier. (8) Accept status identifier. First enter calibration mode (mode 5). See the preceding topic To Enter Calibration Mode (mode 5).After calibration mode is first entered, the system enters the first submode 01 or 15. This depends on the state of the engine. The number that is showing on submode identifier (7) is the submode that is currently entered. The only submodes that can be accessed are the submodes that correspond to the current state of the engine. The Engine is OFF in submodes 01 through 12. The Engine is ON in submodes 15 through 23. See the preceding Calibration Submodes chart.
Press and hold the "SERVICE" switch (1) .
Release the switch when submode identifier (7) is displaying the number of the submode that is desired. The different submodes are used to perform calibration procedures. The procedures for calibration on the following pages will describe the actions that are needed in different submodes.To Store A Value Within Certain Submodes
Illustration 5 g00402288
Symbols Shown On Accept Status Identifier (8) . (9) Accepted symbol. (10) Accepted symbol. (11) Not accepted symbol. (12) Not accepted symbol. Note: The two accept symbols and the two not accept symbols verify the operation of the calibrate switch. When the calibrate switch is in the UP position, accept symbol (9) or not accept symbol (11) is used. When the calibrate switch is in the DOWN position, the accept symbol (10) or the not accept symbol (12) will be used.The calibration procedures on the following pages describe the required conditions for storing a value.
Press and hold the "CALIBRATE" switch (3) in the STORE position. At this time, the accept status identifier (8) will briefly show the accepted symbol (10) or the not accepted symbol (12) . If accept status identifier (8) shows accepted symbol (10) , the new