JETStream TwinForce Series, Operation Manual

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48
Operation Manual
13. Pull each stuffing box from the pump
case (Figure 66).
14. Clean the stuffing box bore thoroughly
and apply petroleum jelly or Anti-Seize to
the bores.
15. Install the new stuffing boxes into the
pump case. Orient the stuffing boxes so
the flat face on the outer diameter match -
es the flat face in each case bore.
16. Extend the plunger from each stuffing
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 sufficient
torque on the nut.
ATTENTION
Apply petroleum jelly or Anti-Seize to each stuffing
box bore when installing stuffing boxes to help
prevent corrosion and extend pump life.
Figure 66: Stuffing Box Removal.
Figure 67: Plunger Coupling Installation.
Plunger Coupling
Figure 68: Tightening the Gland Nuts.