Custom Mud Pump/Mud Cleaning System Manufacturing Thunderbolt Hydraulic-Powered Mud Pumps 7 1/2 X 12 - 300 GPM 7 1/2 X 14 - 325 GPM 7 1/2 X 16 - 367 GPM 7 1/2 X 18 - 413 GPM Thunderbolt Hydraulic-Powered Mud Pump Image:  Image:  Image:  Image:  Mud Pump Specifications 7 1/2 x 12 - 250 HP 300 GPM x 800 PSI A-106 Alloy Rated at 48,000 Lbs. Tensile Strength 300 Gallon Oil Tank Water-Flow Control From 1 GPM to 300 GPM 4' x 88" x 32" Weight 3,800 Lbs. 2 - 4" Suctions Schedule 80 Runs Through Oil Tank to Cool Oil