With Front Air Only

1. With manifold gauge set valves closed to center hose, disconnect vacuum pump from manifold gauge set.
2. Connect center hose of manifold gauge set to refrigerant drum.
3. Purge air from center hose by loosening hose at manifold gauge set and open refrigerant drum valve. When refrigerant escapes from hose, tighten center hose connection at manifold gauge set.
4. Disconnect wire harness connector at clutch cycling pressure switch, if equipped. Install jumper wire across terminals of connector.
5. Open manifold gauge set low side valve and allow refrigerant to enter system.

NOTE: Refrigerant can must be kept upright if vehicle low pressure service gauge port is not on suction accumulator/drier or suction accumulator fitting.

6. When system stops drawing refrigerant in, start engine and set control lever to A/C position and blower switch to High position to draw remaining refrigerant into system.

NOTE: During charging, it may be necessary to use a high volume fan to blow air through the condenser in order to prevent excessive refrigerant system pressures or engine overheating.

7. When 2.75 lb of refrigerant is in the system, close gauge set low pressure valve and refrigerant supply valve.
8. Remove jumper wire from clutch cycling pressure switch connector, if equipped. Connect the connector to pressure switch.
9. Operate system until pressures stabilize to check operation and system pressures.
10. When charging is complete and system operating pressures are normal, return compressor service valves, if equipped, to the back seated position. disconnect gauge manifold hoses from system and install protective caps over service fittings.