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GC Series Gear Pump, 0.39 cu in/rev, 4-bolt 1.78 in. pilot Mounting Flange, 0.50 in. dia. X 1.50 in. extension Shaft, SAE-10 Side Ports, Bi-Directional with check valves Rotation

Description & Features

CONCENTRIC ROCKFORD INC brings you the GC Series Gear Pump, engineered for reliable performance under rugged conditions. This gear pump features a displacement of 0.39 cu in/rev and is equipped with a 4-bolt 1.78 in. pilot mounting flange.

Designed with cast iron bodies and hardened steel gears, this pump ensures superior volumetric efficiency and high mechanical efficiency. The 0.50 in. diameter x 1.50 in. extension shaft and SAE-10 side ports facilitate versatile installation.

Capable of a maximum speed of 4000 RPM and a minimum speed of 750 RPM, it operates bi-directionally and includes check valves. The maximum system temperature is 250deg;F with a pressure rating of 1600 PSI, supporting various industrial applications.

Among its features, the pump incorporates Viton high-pressure seals with an outboard ball bearing and needle bearing construction, ensuring long-life service. The rated flow is 3 GPM.

Supplier Part Number: 1300098

MPN: C1LW75

Specifications

Displacement 0.39	Displacement 0.388	Brand Concentric Rockford Inc	Brand Concentric Rockford	Pack Size 1.00	UOM EA	Features Viton High-Pressure Seal w/Outboard Ball Bearing	Mount 4-bolt 1.78 in. pilot	Mount 4-bolt 1.78 in. pilot	Ports SAE-10 Side	Ports SAE-10 Side	Pressure Rating 1600	Rated Flow 3	Rated Flow 3	Rotation Bi-Directional with check valves	Shaft 0.50 in. dia. X 1.50 in. extension	Shaft 0.50 in. dia. X 1.50 in. extension	Speed Rating 4000 RPM	Speed Rating 4000 RPM	Supplier Part Number 1300098	Alternate Part Numbers Alternate Part Number C1LW75, Alternate Part Number G1224C3A300N00	Product Weight 5.52 lbs

Similar Products

Model Number	Displacement	Rated Flow	Mount	Shaft	Ports	Rotation	Features	Speed Rating	Pressure Rating
1300086 GC Series Gear Pump	0.129	1	4-bolt 1.78 in. pilot	0.17 1in. Tang w/Short Coupling	SAE-6 Side	Bi-Directional with check valves	Single Lip Buna-N Pressure Seal	4000 RPM	3000
1300094 GC Series Gear Pump	0.129	1	4-bolt 1.78 in. pilot	0.50 in. dia. X 1.50 in. extension	SAE-6 Side	Bi-Directional with check valves	Viton High-Pressure Seal w/Outboard Ball Bearing	4000 RPM	3000
1300096 GC Series Gear Pump	0.258	2	4-bolt 1.78 in. pilot	0.50 in. dia. X 1.50 in. extension	SAE-8 Side	Bi-Directional with check valves	Viton High-Pressure Seal w/Outboard Ball Bearing	4000 RPM	2300
1300098 GC Series Gear Pump	0.388	3	4-bolt 1.78 in. pilot	0.50 in. dia. X 1.50 in. extension	SAE-10 Side	Bi-Directional with check valves	Viton High-Pressure Seal w/Outboard Ball Bearing	4000 RPM	1600

Product Questions & Answers (3)

Question by: Brent S on May 26, 2025, 4:16 PM

got a 4-bolt 1.78 pilot mount on my setup. is that what this pump takes, and what shaft size are we talkin?

Answer by: Customer Support on May 28, 2025, 2:42 PM

It uses a 4-bolt 1.78 in. pilot mounting flange and it comes with a 0.50 in. diameter shaft with a 1.50 in. extension.

Question by: Wayne B on Apr 1, 2025, 2:38 PM

pump's rated at 3 GPM and 1600 PSI, is that enough muscle for a mid-size log splitter or similar equipment runnin continuous cycles?

Answer by: Customer Support on Apr 2, 2025, 8:20 PM

For a mid-size log splitter, those numbers line up pretty well. At 3 GPM and 1600 PSI, you've got enough flow and pressure to drive most standard single-stage splitter cylinders without pushing the pump past its limits. One thing worth keeping in mind is that the ratings on this unit are based on anti-wear hydraulic fluid at 200 SSU viscosity, so as long as your fluid matches up, you should get consistent output. The pump also handles speeds between 750 and 4000 RPM, so your prime mover has plenty of range to work within.

Question by: Shane W on Oct 27, 2025, 6:36 AM

What kind of fluid is best in this pump?

Answer by: Customer Support on Oct 28, 2025, 2:04 PM

Ratings are based on using anti-wear hydraulic fluid with a viscosity of 200 SSU. If you're looking to use something different, it's best to get in touch with us so we can advise you.