A/C - New Connections & O-Rings

Classification:
HA97-O12

Reference:
NTB98-005

Date:
February 1, 1998

NEW A/C CONNECTION 0-RINGS

APPLIED VEHICLES:
All Nissan (except Quest)

SERVICE INFORMATION

This service bulletin identifies differences in A/C 0-rings as they apply to the NEW and FORMER type A/C connections.





The NEW type connection has a groove in the tube end in which the 0-ring is seated. The FORMER type connection does not have a groove but instead has an inflated portion on the tube end to support the 0-ring. Refer to Figure 1 for illustrations identifying each connection type.








When servicing the A/C refrigeration loop, refer to the charts (Figure 2 and 3) to identify the correct 0-ring type. The charts list both NEW and FORMER 0-ring types and illustrates the 0-rings in full-scale size.

IMPORTANT POINTS

^ There is NO interchangeability between NEW and FORMER connection type 0-rings. Improper use will cause refrigerant leaks. Therefore, the correct type 0-ring must be used with each application.

^ Nissan vehicles requiring A/C 0-ring replacement should be checked for proper 0-ring part numbers through the applicable parts microfiche.

^ Insure correct 0-ring installation onto tube (see Figure 1).





CAUTION:
When installing high pressure tubes (with flange connections) to their mating parts, make sure the flange is fully seated onto the mating part before the securing bolt is installed and tightened (see Figure 4). If the securing bolt is installed and tightened before the tube flange is seated onto its mating part, 0-ring damage and leaks can result.