17 mm
Disconnect the high pressure line.
NOTE: Because the valves are installed 90 degrees to the pump axis, the pump may need to be removed to change the
valves close to the cylinder block.
16 mm
Remove the valve.
Inspect the valve to be sure it is not stuck.
Inspect the sealing surfaces for possible leak paths.
16 mm
Caution: The installation torque is very critical. Overtightening can distor the bore in the pump hydraulic head causing the rotor to seize on the bore. Never tighten the valve with the engine running.
Assemble the back leakage valve and new washers.
Tighten the valve to 30 N*m [23 ft-lb].
17 mm
Connect the high pressure line.
Start the engine and vent one line at a time until the engine runs smoothly.
