3-65 Section 3 - Operation

Transmission Operation

If the machine is operating at the max gear limit and the operator manually request a downshift, the transmission controller will downshift the transmission as long as the downshift will not cause engine overspeed, even when the downshift point is not satisfied..

Inching Pedal Calibration

To ensure the proper operation of the inching pedal and to prevent false diagnostics at machine start-up, an inching pedal calibration is required during the initial factory startup of the machine..

Diagnostic/Protection Mode

In the event that the transmission controls detect a malfunction, an operator warning is generated while action is taken to minimize damage to the machine..

The response strategy when a solenoid or machine function error occurs is to keep the machine in the current operating condition if possible..

If a fault occurs that prevents further operation in the current gear, then the transmission will shift into neutral immediately..

In order to perform the inching pedal calibration, use the following steps:

•Turn the key switch to “OFF”..

•Place shifter in Neutral and the inching pedal is in the fully released position..

•Turn key to ON position and wait until the machine display is running normally..

•Acknowledge and troubleshoot any faults that are displayed (make sure no faults exist for the inching pedal sensor and limit switch)..

•Without performing any other functions, depress fully (and hold for minimum of 1 second) and release fully the inching pedal four times in a row.. (Note that the limit switch must toggle with the inching pedal firmly depressed)..

•Note any fault conditions on the machine display..

•By the fourth pedal press, a message should appear on the display indicating a successful inching pedal calibration.. If a successful inching pedal calibration does not show up on the display, check for diagnostics on the inching pedal sensor and switch and verify the sensor and switch are working properly..

•If fault conditions exist involving the inching pedal sensor or switch, follow troubleshooting guides to resolve the fault conditions.. Perform the inching pedal calibration once the faults has been resolved..

NOTE: The calibration can be performed whenever the machine is powered up, but is not necessary every time since the calibration values are stored into permanent memory in the transmission ECM. The inching pedal calibration is required if hardware adjustments or replacements are made to the inching pedal assembly items (pedal linkage, sensor, switch, etc.)

Advanced Default Mode (Limp Home/Default Mode)

If the transmission is shifted to neutral due to fault conditions (either by the operator or the transmission controller), further operation in gears up to F6 (if available) will be allowed.. Shifts out of Neutral up to F6 can be initiated.. If requested gear is not available the highest available gear less than the requested gear will be engaged..

If a short to battery fault occurs on clutches 1, 2, 3, 4, 8, or 9, and if the transmission shifts into Neutral (either requested by operator or the transmission controller), the transmission will remain in Neutral until corrective action has been taken to clear the fault.. Default Mode cannot be initiated during these clutch faults due to the lack of modulation profile for the output clutches (lack of adequate lube for modulation)..

NOTE: If a solenoid fault occurs in gears above F6, the transmission will be allowed to maintain gears above F6 if possible, but once shifted below F6 or into Neutral, the F6 limit will apply.

NOTE: The Advanced Default Mode will be incorporated in the software only. Loss of power to the ECM will result in all solenoids de-energizing.

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