Corrective Actions & Additional Info

If the truck-side check valve has failed, replace the check valve, Prime the SmartPTO pump following the Pump Priming procedure, and retest SmartPTO. See detailed Pump Priming Procedure instructions on the “Pump Priming Procedure” tab of this workbook

When the truck-side check valve fails, it will not impact the functionality of the transmittion-drive PTO pump. A failed check valve provides a potential leak path back to tank trough the PTO pump, therefore, any pump operating down stream of the truck-side check valve will suffer from from that leakage. It is possible for the truck-side check valve to fail in a way that doesn’t completely prevent SmartPTO or the emergency DC pump from actuating the hydraulics. In that case, the hydraulic actuation speed should be significantly slower than normal