JETStream TwinForce Series - Page 56

48
Operation Manual
13. Pull each stufng box from the pump
case (Figure 66).
14. Clean the stufng box bore thoroughly
and apply petroleum jelly or Anti-Seize to
the bores.
15. Install the new stufng boxes into the
pump case. Orient the stufng boxes so
the at face on the outer diameter match-
es the at face in each case bore.
16. Extend the plunger from each stufng
box until it mates with the opposing
crosshead pony rods. Install the plunger
coupling (Figure 67) on each plunger and
secure with the two bolts. Tighten the
bolts to 20 ft.-lb.(27 N·m).
17. Ensure the gland nuts are tight. Use the
pump wrench and a 5 lb. (2 kg) hammer
to tighten the gland nuts to approximate-
ly 250 ft.-lb.(338 N·m) (Figure 68). Hit the
wrench about three times using moder-
ate power. This should supply sufcient
torque on the nut.
ATTENTION
Apply petroleum jelly or Anti-Seize to each stufng
box bore when installing stufng boxes to help
prevent corrosion and extend pump life.
Figure 66: Stufng Box Removal.
Figure 67: Plunger Coupling Installation.
Plunger Coupling
Figure 68: Tightening the Gland Nuts.