Meggitt Fuelling Products
Maintenance Manual (MMF251)
Hydrant Coupler – F251 Series
USE OR DISCLOSURE OF DATA ON THIS PAGE IS SUBJECT TO THE RESTRICTIONS ON THE TITLE PAGE OF THIS DOCUMENT
28 Feb 2014
Revision 4.0
5
FAULT ISOLATION
1. General
Refer to
Table 2
for fault isolation information. Locate suspected faulty component and take appropriate
remedial action.
Table 2
Fault Isolation
FAULT
POSSIBLE CAUSE
CORRECTIVE ACTION
Leakage from outlet adapter
Damaged or worn bearing ring,
(
IPL Figure 2
, 6), seal (
IPL Figure 1
,
15) or O-ring (21)
Check condition and if necessary
replace the bearing ring, seal,
and/or O-ring.
Leakage from elbow flange
Damaged or worn O-ring (13)
Check condition and if necessary
replace the O-ring.
Leakage past handle shaft
Damaged or worn O-ring (33)
Check condition and if necessary
replace the O-ring.
Leakage past poppet when closed
Damaged or worn O-ring ( 21)
Check condition and if necessary
replace the O-ring.
Damaged or worn sleeve assembly (12)
Check condition and if necessary
replace the seat.
Damaged or wear on seat face of
poppet (9)
Check condition and if necessary
replace poppet.
Leakage at hydrant adapter when
open
Damaged or worn O-ring (21)
Check condition and if necessary
replace the O-ring.
Damaged or worn seal (15)
Check condition and if necessary
replace the seal.
