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Chief Group 3 Gear Pump (3PG) - 51.0 CC, 7/8" Key Shaft, SAE-B 2-Bolt Mount, SAE-20/16 Ports, CCW Rotation
The Chief Group 3 Gear Pump (3PG) is a high-pressure hydraulic gear pump built for demanding hydraulic circuits. With an SAE-B 2-bolt mounting flange and a 7/8" straight-key shaft, it integrates easily into standard systems and delivers reliable, steady flow under tough loads in industrial machinery, presses, and mobile equipment. Constructed with an aluminum center housing and cast iron end plates, it accommodates seven displacement sizes from 0.24 to 1.52 in³/rev (4.0-25 cm³/rev) and uses a standard SAE B - 2 bolt mounting flange. The standard shaft is 7/8" diameter with a 1/4" key; additional shaft options are available. Filtration should be 25 microns or better; oil viscosity 6-200 cSt; ambient -22 to 55 °C; oil temperature -25 to 80 °C; inlet pressure 12 to 32 PSI abs. This model GP30-51S-78KB2 CID 3.11 is designed for reliability and compatibility with standard hydraulic systems.
✅ Seven displacement sizes from 0.24 to 1.52 in³/rev (4.0-25 cm³/rev)
✅ Flow at 1800 RPM and operating pressure up to 3625 PSI
✅ Rated speed up to 2000 RPM (rated) / 3000 RPM (max)
✅ Ports: inlet SAE-20, outlet SAE-16; rotation CCW; mounting SAE-B 2-bolt
✅ Shaft: 7/8" straight key (7/8" dia, 22.23 mm; key 1/4", 6.35 mm)
✅ Pack Size: 1
💡 What is a gear pump used for in hydraulic systems?
A gear pump creates a steady flow of hydraulic fluid at a set pressure to move actuators and hydraulic motors. - Constant, steady flow for hydraulic actuators and motors in industrial and mobile equipment
- Handy for compact, high-pressure hydraulic circuits needing reliable power
- Reliable operation with standard mounting interfaces and CCW rotation for common hydraulic layouts
This combination makes it a handy choice for dependable hydraulic power in both factories and field-ready machines.