Canada - A/C - A/C On, Moaning Sound
BulletinTSB2245R
Issue Date
September 13, 2006
Title
MOAN SOUND WITH A/C ON
Component
HEATING & AIR CONDITIONING
Models
'04 - '06 RX 330
TSB UPDATE NOTICE:
- August 21, 2007: The hint in step 19 has been updated.
Previous versions of this TSB should be discarded.
INTRODUCTION:
Some 2004 - 2006 RX 330 owners may experience a moan noise heard at 1100 rpm to 1400 rpm with the A/C ON. Production changes to the discharge hose and clutch hub have been implemented to prevent this problem. This service bulletin provides a procedure to improve this condition.
APPLICABLE VEHICLES:
- 2004 - 2006 model year RX 330 vehicles.
PARTS INFORMATION:
WARRANTY INFORMATION:
REQUIRED SSTS:
REPAIR PROCEDURES:
1. Verify the Customer Concern.
A. Start the engine.
B. Turn the A/C ON.
C. Hold the engine RPM between 1100-1400.
D. Turn the A/C OFF.
If there is a noticeable moan sound with the A/C ON and no sound when the A/C is OFF, continue with this repair procedure.
2. Remove Engine Side Cover.
A. Remove the 4 clips and then remove the engine side cover.
3. Evacuate the refrigerant HFC-134a (R-134a) using a refrigerant recovery/recycling machine
4. Remove the engine under cover assembly.
Remove the 5 clips, 4 bolts, and 2 screws, and then remove the engine under cover.
5. Remove V (cooler compressor to crankshaft pulley) belt No. 1.
A. Loosen bolt C.
B. Loosen bolt A.
C. Loosen bolt B and remove the V (cooler compressor to crankshaft pulley) belt No. 1.
6. Disconnect cooler refrigerant discharge hose No. 1.
A. Remove the nut and disconnect the cooler refrigerant discharge hose No. 1 from the compressor and magnetic clutch.
B. Remove the O-ring from the cooler refrigerant discharge hose No. 1.
NOTE:
Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
7. Disconnect cooler refrigerant suction hose No. 1.
A. Remove the bolt and disconnect the cooler refrigerant suction hose No. 1 from the compressor and magnetic clutch.
B. Remove the O-ring from the cooler refrigerant suction hose No. 1.
NOTE:
Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
8. Remove the compressor and magnetic clutch.
A. Remove the bolt and wire harness bracket.
B. Disconnect the connector and clamp.
C. Remove the 2 bolts, nut, and the cooler compressor bracket.
D. Remove the 3 bolts and the compressor and magnetic clutch.
9. Remove the magnetic clutch assembly.
NOTE:
Do NOT change the combination of the magnet clutch washers used before disassembly.
A. Remove the 2 bolts and bracket.
B. Place the compressor and magnetic clutch in a vise.
NOTE:
Do NOT get the bracket and harness caught in the vise.
C. Using the SST, hold the magnetic clutch hub.
- SST 07112-76060
D. Remove the bolt, magnetic clutch hub, and magnetic clutch washer.
HINT:
There is NO set number of magnetic clutch washers since they are used for adjusting.
10. Install the magnetic clutch washers and NEW magnetic clutch hub.
Using the SST, hold the magnet clutch hub and torque the bolt.
- SST 07112-76060
Torque: 18 N-m (183 kgf-cm,13 ft-lbf)
NOTE:
Make sure that there is NO foreign matter or oil on the compressor shaft, bolt, and clutch hub.
11. Inspect the magnetic clutch clearance.
A. Set the dial gauge to the magnet clutch hub.
B. Connect the positive (+) battery lead to terminal 3 of the magnet clutch connector and the negative lead to the ground wire. Turn ON and OFF the magnet clutch and measure the clearance.
Standard clearance: 0.35 to 0.60 mm (0.013 to 0.023 in.)
If the measured value is NOT within the standard range, remove the magnet clutch hub and adjust it with magnet clutch washers.
NOTE:
Adjustment should be performed with 3 or less magnetic clutch washers.
C. Remove the compressor and the magnetic clutch from the vise.
D. Install the bracket with 2 bolts.
12. Remove the cooler refrigerant discharge hose No. 1.
A. Remove the bolt and disconnect the cooler refrigerant discharge hose from the condenser assembly.
B. Remove the bolt from the piping clamp and remove the cooler discharge hose.
NOTE:
The next step is for 2004 model year vehicles only. If the vehicle is a 2005 - 2006 model year, go to step 14.
13. Replace the cooler bracket.
A. Remove the bolt and then remove the cooler bracket.
B. Install the NEW cooler bracket and hand start the bolt.
C. Torque the bolt.
Torque: 9.8 N-m (100 kgf-cm, 86.8 in.-lbf)
14. Install the NEW cooler refrigerant discharge hose No. 1.
A. Sufficiently apply compressor oil to the O-ring and fitting surface of the condenser.
B. Connect the cooler refrigerant discharge hose to the condenser assembly and hand start the bolt.
C. Torque the bolt.
Torque: 9.8 N-m (100 kgf-cm, 86.8 in.-lbf)
D. Place the piping clamp on the isolator stud and hand start the nut.
E. Torque the nut.
Torque: 9.8 N-m (100.0 kgf-cm, 86.8 in.-lbf)
15. Install the compressor and magnetic clutch.
A. Hand start the 3 bolts.
B. Fully tighten the compressor and magnetic clutch with bolt A and bolt B.
Torque: 25 N-m (250 kgf-cm, 18 in.-lbf)
C. Install the cooler compressor bracket with the 2 bolts and nut.
Bolt C Torque: 25 N-m (250 kgf-cm, 18 in.-lbf)
Nut D Torque: 25 N-m (250 kgf-cm, 18 in.-lbf)
Bolt E Torque: 18 N-m (184 kgf-cm, 13 in.-lbf)
D. Tighten the compressor and magnetic clutch with bolt F.
Torque: 25 N-m (250 kgf-cm, 18 in.-lbf)
E. Connect the connector and clamp on the cooler compressor bracket.
F. Install the wire harness bracket with the bolt.
16. Install cooler refrigerant suction hose No. 1.
A. Remove the attached vinyl tape from the hose.
B. Sufficiently apply compressor oil to the NEW O-ring and fitting surface of the compressor and magnetic clutch.
Compressor Oil: ND-OIL8 or equivalent
C. Install the O-ring to cooler refrigerant suction hose No. 1.
D. Install cooler refrigerant suction hose No. 1 to the compressor and magnetic clutch with the bolt.
Torque: 9.8 N-m (100 kgf-cm, 86.8 in.-lbf)
17. Install cooler refrigerant discharge hose No. 1.
A. Sufficiently apply compressor oil to the NEW O-ring and fitting surface of the compressor and magnetic clutch.
Compressor Oil: ND-OIL8 or equivalent
B. Install cooler refrigerant discharge hose No. 1 to the compressor and magnetic clutch. Hand start the nut.
Torque: 9.8 N-m (100 kgf-cm, 86.8 in.-lbf)
18. Temporarily Install V (cooler compressor to crankshaft pullet) belt No. 1.
19. Adjust V (cooler compressor to crankshaft pulley) belt No. 1.
Apply drive belt tension by turning bolt B.
Drive Belt Tension:
New Belt: 170 +/- 10 lbf
Old Belt: 125 +/- 10 lbf
HINT:
- "New belt" refers to a belt that has been used on a running engine at idling for 5 minutes or less.
- "Used belt" refers to a belt that has been used on a running engine at idling for 5 minutes or more.
NOTE:
Check that the drive belt fits properly in the ribbed grooves.
20. Fully tighten V (cooler compressor to crankshaft pulley) belt No. 1.
A. Tighten bolt A.
Torque: 18 N-m (183 kgf-cm, 13 ft-lbf)
B. Tighten bolt C.
Torque: 58 N-m (591 kgf-cm, 43 ft-lbf)
21. Recharge the refrigerant HFC-134a (R-134a) using a recovery/recycling machine.
Specified amount: 600 +/- 50 g (21.15 +/- 1.76 oz)
22. Warm up engine.
23. Inspect for any refrigerant leakage.
24. Verify the repair.
A. Start the engine.
B. Turn the A/C ON.
C. Hold the engine RPM between 1100-1400 and confirm no moan sound.
D. Turn the A/C OFF.
25. Install the engine under cover assembly.
A. Install the engine under cover.
B. Install the 5 clips, 4 bolts, and 2 screws.
26. Install the engine side cover.
A. Install the engine side cover.
B. Install the 4 clips.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.