Doc. #: A-718C, Rev. 1
Page 26 of 36
8.1.3 If the packing screw and white PTFE wiper (item 24) are in good condition, apply a light film of grease on
the inside and outside surfaces of the packing screw.
8.1.4 Place packing screw (item 8) into the bonnet yoke. Engage the screw by only a few threads, so the bottom
of the screw does not protrude below the threaded part of the bonnet.
Tighten the packing screw to 30 ±
3 ft-lb (40 ± 4 N·m) to seat the Teflon® packing rings. Prevailing drag on the stem due to the packing
will be about 3 ft-lb (4 N·m).
8.1.5 Carefully screw the stem all the way up into the bonnet.
Figure 8-5 Inspect Packing Screw and Wiper
Figure 8-6 Grease Packing Screw
Figure 8-7 Insert Packing Insert in Bonnet
Figure 8-8 Reapply Grease to Stem
Figure 8-9 Insert Stem into Bonnet
