Appendix B - Technical Reference
150-454-111-06
62
February 25, 2000
HRE-454
5
The replacement PCV assembly comes as a unit. It includes the limiting nut, adjustment knob, and all O-rings.
Do not attempt to disassemble it.
6
Insert the valve stem into the body housing’s threaded tip as far as it will go. Some resistance will be
encountered as the O-rings contact the inner housing threads.
7
Rotate the limiting nut one-half turn clockwise.
8
Grasp both the limiting nut and the adjustment knob. Screw this subassembly into the housing until the
adjusting nut tightens the O-ring against the body housing. Do not crossthread.
9
Turn the adjusting knob clockwise until contact is felt between the stem’s O-rings and the inner threads of the
body housing.
10
Use the 1-inch wrench to torque the limiting nut to 200 inch-pounds.
11
Check that the adjusting knob has at least one and one-half turns of free movement in and out.
12
If any binding occurs, loosen the limiting nut and turn the adjustment knob until it moves freely. Retighten
the limiting nut.
13
Rotate the adjustment knob a full turn counterclockwise from its full clockwise position. This should turn the
pressure ON.
14
Pressurize the chamber and check the entire assembly for leaks.
15
Rotate the adjustment knob back and forth and determine that it does turn the airflow OFF when fully
clockwise and back ON when backed off one turn counterclockwise.
Do not overtighten. Excessive torque does not improve the seal and may damage the PCV.
