A/C - Compressor Clutch Service
NUMBER: 10-31-82DATE: 12-09-82
APPLICABILITY:
1983 SUBARU AIR CONDITIONERS
SUBJECT:
COMPRESSOR SERVICING
1. SOA 203 083 - LONE STAR SYSTEM
The Diesel - Kiki compressor and clutch assembly (SOA 203 736) used on Subaru air conditioners SOA 203 083 is not field serviceable. The entire compressor and clutch assembly must be replaced if a failure occurs to any of the component parts.
2. SOA 204 083 OR LINE INSTALLED - HITACHI SYSTEM
The MJS 170 compressor used on Subaru air conditioners SOA 204 083 and the line installed system has a field serviceable compressor and clutch assembly. Table 1 lists part numbers for replacement parts.
TABLE 1
COMPRESSOR AND CLUTCH ASSEMBLY SOA 204 727
COMPRESSOR ASSEMBLY WITHOUT CLUTCH SOA 204 728
CLUTCH ASSEMBLY SOA 204 729
Claims for replacing the compressor and clutch as an assembly, SOA 254 727, will not be accepted unless both component parts have failed. In all cases, only the failed component part must be replaced.
The clutch on the MJS 170 compressor can be removed by following the procedure stated below in place of the procedure outlined on page 13-31 of the 1983 Subaru Service Manual (MSA-116).
1. Remove the compressor from the vehicle according to the procedure on pages 13-30 and 13-31 of the 1983 Subaru Service Manual (MSA-116).
2. Hold the clutch hub from turning with the clutch spanner wrench (SOA 624 878). Remove the 13 mm hex head nut from the compressor shaft with a 13 mm socket wrench. (See Figure 1).
3. The clutch hub puller (SOA 624 880), can be used to remove the clutch hub. However, it will be necessary to place a small capscrew (8 mm hex head) on the compressor shaft before installing the tool. This will ensure that the clutch hub is pulled completely off of the compressor shaft. (See Figure 2).
4. Place the clutch hub puller over the small capscrew and thread it into the clutch hub. Pull the clutch hub off of the compressor shaft by turning the clutch hub puller center bolt clockwise with a 15 mm socket wrench while holding the clutch hub with the clutch hub spanner wrench. (See Figure 3).
5. Carefully remove the adjusting shims from the compressor shaft. Note that the same amount of shims must be reinstalled on the compressor shaft before re-installation of the clutch assembly. (See Figure 4).
6. Remove the snap ring which retains the clutch hub pulley with a pair of external expanding snap ring pliers. (See Figure 5).
7. Remove the pulley and bearing assembly. If the assembly cannot be removed by hand, tap it gently with a plastic hammer. If this does not remove the assembly, use a commercially available puller such as Kent-Moore tool J-29884 to remove the pulley and bearing assembly.
8. Remove the snap ring which retains the clutch coil with a pair of external snap ring pliers. Remove the Phillips screw which attaches the clutch wire to the compressor. Remove the compressor clutch coil. (See Figure 6).
9. Replace the failed part and reassemble in the reverse order of disassembly. Be careful to install the same adjusting shims onto the compressor shaft. Refer back to Figure 4.
10. The hub to pulley clearance should be 0.5 to 0.8 mm (0.20-0.031 inches). If the specified clearance is not attained, adjust the amount of shims to achieve the specified clearance. Torque the shaft nut to 15 ft.lbs. (See Figure 7).
11. Reinstall the compressor and clutch assembly onto the vehicle following the procedures on pages 13-30 and 13-31 of the 1983 Subaru Service Manual (MSA-116). Consult pages 13-19 through 13-24 for proper evacuating and charging procedures.
If a failed Subaru air conditioner compressor is replaced, it is recommended that the receiver drier also be replaced. The receiver drier must be replaced whenever contaminants enter the system or if the receiver drier is blocked.