4300
Catalog
Assembly / Installation
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
S10
Parallel (SAE, BSPP and metric)
CONDITION
Washer is too loose (moves
by its own weight or rocks too
much on the undercut)
Fitting threads are distorted
Several scratches or nicks on
the port face
Spot face of port is smaller
than washer diameter
Port threads are distorted
(
yielded)
Leakage persists after
locknut has been torqued
Washer distorted, allowing
opportunity for O-ring to
extrude
PROBABLE CAUSE(S)
•
Washer damaged
•
Over-torqued
•
Mixed threads
•
Port face contaminated (dirty)
•
Improper port tool was used
•
Wrong fitting selected for port
•
Fitting over-torqued
•
Damaged O-ring
•
Damaged washer
•
Improper assembly
•
Exposed upper thread forced
washer into port during
assembly (over-torquing
makes this more prevalent)
RECOMMENDATION
•
Replace fitting
•
Replace fitting and tighten to proper
torque
•
Determine correct thread type
•
Reface the port
•
Reface the port
•
Select a proper fitting
•
Replace component
•
Replace O-ring with new quality O-ring
(90
durometer) and reconnect fitting to
proper torque
•
Replace fitting
•
Follow proper assembly procedure
•
Replace fitting, using proper
installation techniques for adjustable port
ends
Troubleshooting Port End Connections
Dimensions and pressures for reference only, subject to change.
Port End Assembly