Section 9
Troubleshooting
20479300
2-2012/Rev 01
9-7
Table 9-1
S50 Troubleshooting Guide
Malfunction Indication Comments
15.
Water leaking from the
weep hole in the sealing
head
Seat in the discharge check
valve is not sealing properly
Make sure the gland nut is
tightened to the proper torque
specification.
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.
Internal crack in sealing head Replace the sealing head.
A cracked sealing head can
result in water leaking from the
high pressure outlet passages to
the low pressure inlet passages.
The sealing head body can
become extremely hot.
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.
16.
Water leaking from the
weep hole in the sealing
head gland nut
High pressure piping gland
nut is not tight and is not
sealing properly
Tighten the gland nut to the
proper torque specification.
Improper high pressure
piping connection
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.
Inspect the gland nut for
deformation of the threads.
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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