JOHN DEERE 644B John Deere Models: 600 thru 990

THIS IS A 50 CM (3 CI) HYDRAULIC PUMP
THIS PUMP HAS A 1 1/16" INLET PORT ON THE MOUNTING FLANGE LEFT SIDE , A 7/8" PRESSURE PORT IN THE PUMP BODY ON RIGHT SIDE, A 7/8" COOLER RETURN PORT ON TOP AND A 3/8" DRAIN PORT ON THE BOTTOM. IT DOES NOT HAVE AN INLET PORT ON THE MOUNTING FLANGE RIGHT SIDE.
NOTE: THE INDICATED SIDES OF PUMP ARE AS SEEN FROM THE TRACTOR SEAT.
IF YOUR APPLICATION DOES NOT HAVE A DRAIN LINE THE INSTALLATION OF J D PART AR39810 DRAIN LINE KIT IS REQUIRED.

USE WITH R79152, R79154 & R79156 SHAFTS

USE WITH R79152, R79154 & R79156 SHAFTS

USE WITH R34348 SHAFT

USE WITH R34348 SHAFT AND
USE WITH R45874B & R45874BR BUSHINGS
Required: 2

USE WITH R79152, R79154 & R79156 SHAFTS
USE WITH R80558B & R80558BR BUSHINGS
Required: 2

USE WITH R79152, R79154, R79156 & R34348 SHAFTS
Required: 2