Designed for grease-seal, wireline-type lubricator applications, the Mac-28 GP hydraulically powered grease injection pump features a single-acting plunger with a 8-inch power cylinder and two 1 1/2-inch plungers with 4-inch stroke. This grease injection pump is designed with Alloy steel fluid ends and a cylinder body for increased life. Maximum working pressure rating: 25,500 pounds per square inch - Hydraulic oil pressure: 1,200 pounds per square inch @ 58 GPM Max

MAC-28 Grease Pump
Operating Pressure vs. Supply Pressure Volume vs. Stroke Rate
Hydraulic Supply Pressure, psi

Strokes per minute

Volume based on 90% theoretical maximum and 15 GPM Hydraulic Supply

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