When installing a packing, always protect it from cuts or nicks. Do not install packing
directly over threads. If available, install packing over a plastic or rubber thread guard
supplied with new fittings. If no thread guard is available, protect packing by wrapping
fitting threads with heavy, smooth, lint-free paper or tape.
If a backup washer is used with the packing, it must be free of cuts, nicks, and
distortion. An unserviceable backup washer can cause packing to distort or rupture when
hydraulic pressure is applied, resulting in a leak.
Always make sure packing is not damaged, twisted, or distorted after installation.
6. Installation of Adjustable Fittings.
a. Apply coat of lubricating oil (Appendix C, Item 22) to new packing.
P a c k i n g must be located in groove and not on threads to prevent damage to
b. Using suitable thread guard, install packing (1) and backup washer (2) in groove.
c. Turn lock nut (3) down until lock nut just contacts backup washer (2).
d. Install fitting (4) in boss (5) until backup washer (2) makes contact with boss.
e. Position fitting (4) in desired position by backing fitting out up to one full turn. Hold fitting
(4) in desired position and tighten lock nut (3).