This procedure covers replacement of the AC compressor clutch assembly on a 2021-2024 Ford F-150 with 3.5L EcoBoost V6 engine, including refrigerant recovery, clutch removal, and system recharge.

Warnings

Tools required

Parts

• AC compressor clutch assembly × 1 — Use OEM specification
• AC line O-rings × 2 — Use OEM specification
• Serpentine drive belt × 1 — Replace if worn or contaminated
• PAG 46 oil × 1 — For AC system

Fluids

• R-1234yf refrigerant

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely for at least 2 hours
3. Disconnect negative battery terminal and wait 2 minutes
4. Remove engine cover by pulling upward on retaining clips
5. Have AC system professionally evacuated and refrigerant recovered
6. Take photograph of serpentine belt routing for reference

Procedure

1. 1

   Remove serpentine belt
   Rotate serpentine belt tensioner clockwise using breaker bar on tensioner pulley bolt. Slide belt off AC compressor pulley first, then release tensioner and remove belt completely from engine. Inspect belt for contamination or damage and replace if necessary.
2. 2

   Disconnect AC compressor electrical connector
   Locate the AC compressor clutch electrical connector on the front of the compressor. Press the locking tab and pull connector straight off the clutch coil terminals. Move connector out of work area.
3. 3

   Remove compressor mounting bolts
   Support the AC compressor with one hand. Remove the three compressor mounting bolts using appropriate socket. Note bolt locations as they may be different lengths. Carefully pull compressor forward approximately 2-3 inches to access clutch assembly, leaving AC lines connected. Support compressor weight to prevent strain on refrigerant lines.
   Torque spec

   Compressor Bolts39 Nm (29 lb-ft)
4. 4

   Remove clutch plate snap ring
   Locate the large snap ring retaining the clutch plate to the compressor shaft. Use snap ring pliers to carefully compress and remove the snap ring. Place snap ring in clean container for inspection - replace if damaged or worn.
5. 5

   Remove clutch plate
   Grasp the clutch plate hub and pull straight off the compressor shaft. May require gentle wiggling. Note the shim stack location and thickness behind the clutch plate. Keep shims in order for air gap measurement during reassembly.
6. 6

   Remove pulley bearing assembly
   Install pulley puller tool onto the AC compressor pulley/bearing assembly. Thread puller evenly and carefully extract the pulley and bearing from the compressor nose. Avoid cocking the puller to prevent damage to compressor housing.
7. 7

   Remove clutch coil
   Locate and remove the snap ring securing the electromagnetic clutch coil to the compressor front housing. Carefully slide the clutch coil forward off the compressor nose. Inspect coil for signs of overheating or damage.
8. 8

   Install new clutch coil
   Slide new electromagnetic clutch coil onto compressor nose until fully seated against housing shoulder. Install retaining snap ring ensuring it fully seats in groove. Verify coil does not bind or rotate on housing.
9. 9

   Install pulley bearing assembly
   Using AC clutch hub holder tool, carefully press new pulley/bearing assembly onto compressor nose. Press evenly until bearing seats fully against shoulder. Do not hammer or impact bearing during installation.
10. 10

    Install clutch plate with air gap adjustment
    Install original shim stack onto compressor shaft. Install new clutch plate onto shaft, aligning splines. Install retaining snap ring. Using feeler gauge, measure air gap between clutch plate and pulley face at three points around circumference. Gap should be 0.35-0.65mm (0.014-0.026 inch). Add or remove shims as needed to achieve specification.
11. 11

    Reinstall compressor to bracket
    Carefully guide AC compressor back into mounting position, ensuring no strain on refrigerant lines. Align mounting bolt holes and install three compressor mounting bolts. Torque bolts to specification in cross pattern.
    Torque spec

    Compressor Bolts39 Nm (29 lb-ft)
12. 12

    Reconnect electrical and install belt
    Reconnect AC compressor clutch electrical connector until it clicks into place. Route serpentine belt per reference photo taken earlier, ensuring proper seating in all pulley grooves. Rotate tensioner and slide belt onto final pulley.
13. 13

    Recharge AC system
    Reconnect negative battery terminal. Have AC system evacuated to 29+ inches vacuum for minimum 30 minutes to verify no leaks and remove moisture. Recharge system with correct amount of R-1234yf refrigerant per underhood specification label. Add proper amount of fresh PAG 46 oil as specified by clutch manufacturer.

Reassembly

1. Reinstall engine cover by aligning clips and pressing down until seated
2. Verify all tools and parts have been removed from engine bay
3. Double-check serpentine belt is properly routed and seated on all pulleys

Verification

• Start engine and verify serpentine belt runs smoothly without slipping or noise
• Turn AC to maximum cold with fan on high. Clutch should engage within 10-30 seconds with audible click
• Verify AC compressor clutch engages and disengages properly when AC is cycled on and off
• Check for proper cold air output from vents within 2-3 minutes
• Inspect AC lines and fittings for any signs of refrigerant leaks (oily residue)
• Using multimeter, verify clutch coil receives approximately 12V when AC is commanded on
• Verify no unusual noises from compressor during operation
• Confirm AC system pressures are within normal range using manifold gauges

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