Power the machine OFF
Remove the nut , coils  and the spacer  from the tailstock solenoid to gain access to the tailstock check valve .
Attention: Note the position and orientation of the solenoid coils  and the spacer .
Remove the tailstock check valve  from the HPU manifold and replace with the check valve eliminator .
Torque the check valve eliminator to 20 ft-lbs.
Install the solenoid coils  and the spacer  onto the tailstock solenoid and torque the coil locknut  and torque it to 4 ft-lbs.
Note: The tailstock behaviour will change after removing the check valve. When the HPU is turned OFF the tailstock will deflect when pushed by hand