The compressor clutch servicing starts with running the engine at idle speed while activating A/C for 10 minutes followed by engine shutdown and negative (-) terminal battery cable separation. The first step involves both draining refrigerant gas from the refrigeration system along with the removal of the
Drive Belt. To service 1MZ-FE engines it is necessary to eliminate the suction hose through bolt removal followed by wire harness clamp detachment and nut and bolt looseners. Fasten immediately placed caps onto open fittings to block moisture and dirt entry into the system. To disconnect the discharge hose users must remove its clamp bolt. The generator needs to be removed through three steps: first disconnect the generator connector then remove the nut and wire followed by disconnecting the wire harness from its clip and end with pivot bolt and plate washer and adjusting lock bolt removal. Engine models with 5S-FE require engineers to disconnect both suction and discharge hoses through removing the two bolts. The sequence for compressor removal includes disconnecting the connector then breaking loose and removing the 3 bolts. 1MZ-FE engine models need compressor removal that starts with disconnecting the connector then removing the 2 bolts, nut, drive belt adjusting bar bracket before completing with 3 bolts removal. To install the compressor on 5S-FE engine models users should first bolt it into position with three mounting points to 25 Nm (250 kg.cm, 18 ft.lb) torque and finally connect the connector. During installation of the compressor on 1MZ-FE models use the same torque value to install the three bolts followed by the installation of two bolts and a nut along with the drive belt adjusting bar bracket while satisfying torque specifications for Bolt (A) at 25 Nm (250 kg.cm, 18 ft.lb) and for Bolt (B) at 18 Nm (185 kg.cm, 13 ft.lb). Finally, join the connector. 5S-FE engine models require compressor oil lubrication for two new O-rings before installing them onto both hoses which need to be connected with 2 bolts at 10 Nm torque (100 kg.cm, 7 ft.lb). Attaching generators to their brackets requires placement of the pivot bolt followed by adjustment of the lock bolt while keeping it loose until detailed installation. Next, connect the generator wires and connectors. Screw the discharge hose by treating its new O-ring with ND-OIL 8 or equivalent oil then tighten the bolt to 10 Nm (100 kg.cm, 7 ft.lb). To install the suction hose users must first lubricate two new O-rings with compressor oil followed by hose installation then tight the bolt to 10 Nm (100 kg.cm, 7 ft.lb) with nut torque at 32 Nm (330 kg.cm, 24 ft.lb) before putting on the suction hose clamping bolt and wire harness clamp. The drive belt installation should be followed by negative (-) terminal cable reconnection while evacuating air then filling the refrigeration system with 800 plus or minus 50 g (28.22 plus or minus 1.76 oz.) of refrigerant. A gas leak detector must be used to check for refrigerant leaks followed by torque measurements at joints before A/C operation inspection begins.