Document P/N: 2P136539
Release Date: 05/25/2017
Revision: F
30 of 42
Expendable Components (Cont.):
b. Fluid End
Fluid Ends commonly fail by cracking in the crossbore. The time of failure can be extended by a
properly sized suction stabilizer. If it is a nitrogen bladder type, check the charge pressure before
each job.
NOTE:
WHEN CHANGING VALVES USE A MIRROR AND FLASHLIGHT TO CHECK FLUID CYLINDER FOR
CRACKS, AND WIPE ALL SURFACES CLEAN.
c. Plungers
Plungers should be replaced if the hard coating is worn, if they have dents or dings, spalling of
the plunger coating, or grooving.
d. Packing
Packing should be replaced prior to failure. Packing failure can lead to washout of the packing
gland. Between stages, check to see that all packing nuts are tight.
CAUTION: FAILURE TO PROPERLY MAINTAIN PACKING OR ALLOWING THE PACKING NUT TO
LOOSEN CAN RESULT IN MAJOR DAMAGE.
