MSD 2922 Fuel Pump Return Kit Installation - Manual (Page 6)

6 INSTALLATION INSTRUCTIONS
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The depth to which the fitting is inserted into the hose is EXTREMELY IMPORTANT. Stopping too soon,
with the end of the hose positioned directly above the inboard hose barb, will result in excessive hoop
stresses in the braids and outer jacket. Pushing too far, such that the hose starts to ride up on the beauty
ring lead-in chamfer, will have the same result. In either case, the residual hoop stresses (in the braids
and outer jacket) will lead to the formation of splits in the outer jacket once the hose has been exposed
to under-hood temperatures. See Figure 7 for an example of an improperly installed fitting. See
Figure 8 for an example of an improperly installed fitting – which resulted in splits in the outer hose
jacket following heat exposure.
Use the thin edge of the beauty ring as a depth gauge for the end of the hose. STOP pushing when
the end of the hose is flush with the thin edge of the beauty ring. At this point, the end of the hose
should have “rolled over” the inboard barb and conformed snugly to the fitting neck. See Figure 9
for an example of a properly installed fitting.
Figure 7 Improperly Installing Push-Lock Fitting
NOTE: EXCESSIVE GAP BETWEEN END OF HOSE AND THIN EDGE OF BEAUTY
RING - RESULTING IN RESIDUAL HOOP STRESSES IN BRAIDS AND OUTER
JACKET. CONNECTION INTEGRITY HAS BEEN COMPROMISED, AND OUTER
JACKET WILL SPLIT WHEN EXPOSED TO HEAT.