Section 9
Troubleshooting
20425626
5-2005/Rev 0
9-7
S30 Troubleshooting Guide
Malfunction Indication Comments
Make sure the gland nut is
tightened to the proper torque
specification.
Seat in the discharge check
valve is not sealing properly
Inspect the seat, sealing head
and gland nut for scratches,
erosion or cracks.
Improper torque on gland nut Tighten the gland nut to the
proper torque specification.
Erosion or scratches on the
contact surface of the sealing
head, or on the gland nut
where the seat makes contact
Polish the surfaces following
the procedure, Sealing Head
Maintenance, detailed in
Section 8, High Pressure Water
System.
15.
Water leaking from the weep
hole in the sealing head
Internal crack in sealing head Replace the sealing head.
A cracked sealing head can
result in water leaking from the
high pressure outlet passage to
the low pressure inlet passages.
The sealing head body can
become extremely hot.
High pressure piping gland
nut is not tight and is not
sealing properly
Tighten the gland nut to the
proper torque specification.
Check the number of exposed
threads past the collar on the
high pressure piping. Only 1-
1/2 to 2-1/2 threads should be
exposed.
Check high pressure piping for
damage, cracks or deformation.
Improper high pressure piping
connection
Inspect the gland nut for
deformation of the threads.
16.
Water leaking from the weep
hole in the sealing head gland
nut
Damaged sealing head gland
nut
Check the gland nut for cracks
due to fatigue. If cracks are
detected, replace the gland nut.
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