John Deere 4440 Tractor Air Conditioning Delco A6 Compressor, w/ Clutch – New – 8810423 5.625″ 1 Groove, Super Heat Type, w/o Switch, 12V, 10:00 Coil Position, w/ 10 oz. 134a PAG 150 Oil This Compressor Mounts with Metric Bolts. If Required, Hy-Capacity Part Number ##888301170## Metric Mounting Bolt Kit is Available. Replacement O-Rings: ##88415## (A6/R4 Suction & Discharge O-Ring), ##88416## (Super Heat Switch O-Ring)