Service Information

This technical Bulletin details the general service information for all models retrofitted to HFC-134a (R-134a) A/C systems, using a Nissan approved kit.

This Bulletin also describes the specific details of the J3O and B13 models retrofitted to HFC-134a (R-134a) A/C systems.

Refer to the appropriate service Manual, the Retrofit Kit Installation Manual for each model, and NTB93-001 for information not included in this Technical Bulletin.

The technical bulletin NTB93-001 (Classification number HA93-OO1), entitled "A/C SYSTEM CHANGES FOR R-134a REFRIGERANT (All Models)" describes general differences between the R-12 system and the R-134a system.

IMPORTANT POINTS

^ If the vehicle equipped with retrofit A/C system has a sight glass, do not use the sight glass to check refrigerant level because R-134a and the PAG lubricants do not exhibit "clear sight glass" characteristics, even when properly charged.

^ When charging R-134a systems, use the ACR4 Recovery/Recycling/Recharging equipment (J-39500) to insure accurate charging (to .01 lb).

^ If an R-134a system is suspected to be low on refrigerant charge, first perform a system leak check using the R-134a leak detector. After repairing any leaks found, charge the system using the ACR4 Recovery/ Recycling/Recharging equipment (J-39500).

^ Use only Nissan A/C system oil type R for vane rotary compressor, and use only Nissan A/C System Oil Type S for swash plate compressor and V-6 variable displacement compressor. If another lubricant is used, compressor failure is likely to occur.