MAINTENANCE - How to Fill Fluid 2. Make sure the oil temperature is cool. 3. Clean around drain plug and remove plug. 4. Allow transmission oil to drain out. 5. Clean drain plug and torque as required. 1. Note the driving condition under which the problem occurred. 2. Note the condition of the transmission under which the problem occurred (i.e. operation mode (Drive, MANUAL, LOW), current gear, engine speed, etc.). 3. Reset system. WARNING Apply parking brake and follow vehicle manufacturer parking instructions. Fail- ure to follow these instructions could cause unintended vehicle movement re- sulting in death, serious injury or dam- age to property.
3 How to Fill Fluid Transmission Reset Procedure In some cases, proper transmission operation can be restored by “resetting” the Transmission Control Module (TCM). Use the following procedure to reset the TCM. 1. Continue to drive the vehicle to a safe location before selecting “N” NEUTRAL. 4. Turn the vehicle ignition to the “off” position. 5. Wait at least 2 minutes. 6. Restart the engine. 7. If the problem continues, contact a service facility to have the vehicle and transmission system evaluated. 1. Remove transmission oil fill plug. 2. Make sure drain plug is properly installed. 3. Fill with approved oil until the oil starts flowing out the fill hole. 4.
Clean, install, and properly and torque fill plug. NOTE Transmission Air Supply For optimal performance, the PACCAR Automated Transmission requires a nominal air supply operating range between 90 psi (5.9 bar) and 130 psi (9.0 bar). Troubleshooting Once “N” NEUTRAL is selected, a gear engagement may not be allowed de- pending on the nature of the problem. Diagnostics In the event there is a problem with an Automated Transmission, there are three primary tasks the driver should perform: 2. Place the Transmission Driver Interface Device in Neutral “N”. 3. Set the vehicle parking brake. 34 Y53-1272-1B1 (08/17)