Listings Mud Pumps National 7-P-50 Triplex Mud Pumps Driven with CAT 379 Diesel Engine – Used ** SOLD ** By admin 9 years ago Two (2) National 7-P-50 Triplex Mud Pumps Driven with CAT 379 Diesel Engine Continue Reading Previous Baylor Elmagco Eddy Current 6032 Brake – RebuiltNext Ideco 23″ x 44″ Rotary Table with Varco MSS Master Bushing & No #3 Bowl – Rebuilt