What is compressor air gap?
AC compressor clutch assembly air gap. The clutch is designed to engage the pulley to the compressor shaft when the clutch coil is energized. Nearly all clutch assemblies have a clearance specification for the distance between the clutch and the pressure plate.
Is AC compressor pulley supposed to be loose?
A loose A/C pulley suggests a bad clutch bearing. This can allow enough movement to damage the magnetic coil. It’s possible to change the bearing without discharging the system and removing the compressor from the car, but there is very little room to work.
What causes an AC clutch to slip?
A slipping AC compressor clutch is a sign of severe wear, shorted clutch coil or an incorrect air gap (explained later). The AC compressor drive belt rotates the compressor pulley at all times when the engine is running.
How do you check the air gap on a Denso compressor?
Spin the pulley before performing a final check of the air gap. On models with the clutch plate recessed into the pulley, use a 90 degreewire gap gauge to measure the clutch air gap. On other models, use a blade type feeler gauge to measure the air gap. 8.
Which is the best Denso heavy duty a / C compressor?
DENSO’s high reliability is why John Deere has used DENSO heavy duty A/C compressors in their equipment for over 30 years. Simply put, DENSO produces the best heavy duty A/C compressors in the world for the best construction and agricultural equipment.
When to add shims to a Denso a / C compressor?
If the air gap is not between specifications, add or subtract shims as needed until the correct air gap is obtained. CAUTION:Be certain that the compressor clutch field coil wire harness is properly routed so that it is not pinched between the A/C compressor and the field coil connector bracket. 9.
What should the air gap be on an AC compressor?
If your AC compressor clutch air gap is wrong, the compressor clutch won’t engage or may engage but slip. Here are the AC compressor clutch air gap specs for many common AC compressor clutches Model: C171, A590 is adjusted with shims to .020″ – .035″ Model: 10PA17C is adjusted with shims to .014″ – .026″