Lincoln 84683 Grease Pump Assembly
The Lincoln 84683 is a packaged 400 lb (181.4 kg) drum grease pump assembly for mobile lubrication and lube truck service. This package is built around the 84668 bare pump assembly, a 50:1 air-operated piston pump. It is a package listing, not a bare pump listing, and it includes the air-side connection items needed to start a drum installation.
This page covers only what the Lincoln catalog verifies for the 84683 package. Where Lincoln does not publish a figure, this page says so plainly instead of repeating unverified numbers from older listings.
Official Specifications
- Pump ratio: 50:1 air-driven piston pump.
- Free air displacement: 90 cu in/min (1475 cm3/min).
- Air inlet: 1/4 in NPT female.
- Material outlet: 1/4 in NPT female.
- Included in the package: air coupler, nipple, and volume elbow union.
- Hoses: not included.
The package is intended for use with a 400 lb (181.4 kg) grease drum. The 50:1 ratio means the pump multiplies air input pressure by 50 at the material outlet, but Lincoln does not publish a maximum output pressure for this package listing.
What Lincoln Does Not Publish
Lincoln does not publish maximum output pressure, air pressure range, output per cycle, or package weight for the 84683 package. Older listings carried additional performance figures that the current catalog listing does not confirm.
Size the air supply from the 50:1 ratio and the free air displacement of 90 cu in/min (1475 cm3/min). Confirm pressure and flow figures against the pump nameplate and the quotation before finalizing the installation. Do not assume unlisted performance values from similar Lincoln packages.
The 84683 package is a real Lincoln catalog item, but its published data is limited to ratio, displacement, thread sizes, and the three included air-side parts.
84683 and 84668: Package and Bare Pump
The 84683 is the package listing, and the 84668 is the bare pump assembly inside it. Order the 84683 package for a complete drum installation when you need the air coupler, nipple, and volume elbow union along with the pump.
Order the 84668 bare pump only when replacing a pump inside an existing package that already has the air-side connection parts. The catalog listing does not confirm any series name for this pump, so verify the series from the pump nameplate before ordering service parts.
Mobile Lubrication Service
This package suits lube trucks and mobile service carts dispensing grease from 400 lb drums. The included air coupler, nipple, and volume elbow union support the air side of the installation, while hoses are supplied separately to match the truck layout.
For more context on how drum pumps fit into broader lubrication setups, see the Lincoln grease pump range on this site. Drum pumps like the 84683 can also feed dual-line systems where a central pump supplies multiple points.
Ordering and Verification
Confirm the 50:1 ratio, 90 cu in/min (1475 cm3/min) free air displacement, 1/4 in NPT female air inlet, 1/4 in NPT female material outlet, and the three included package items at quotation. Request the package manifest to verify that the air coupler, nipple, and volume elbow union are present before installation.
For system context on how grease supply pumps work in centralized lubrication, see grease supply pumps in centralized lubrication systems. To request a quotation for the 84683 package, contact us here.
Frequently Asked Questions
What is the Lincoln 84683?
The Lincoln 84683 is a packaged 400 lb (181.4 kg) drum grease pump assembly for mobile lubrication and lube trucks. It includes the 84668 bare pump assembly plus air coupler, nipple, and volume elbow union.
What is the 84668?
The 84668 is the bare pump assembly inside the 84683 package. It is a 50:1 air-operated piston pump without the package air-side connection parts.
What pump ratio does the 84683 use?
The 84683 package uses a 50:1 air-driven piston pump ratio. This ratio multiplies air input pressure by 50 at the material outlet.
What is the free air displacement?
The free air displacement is 90 cu in/min (1475 cm3/min). This figure is published by Lincoln for the 84683 package listing.
What thread sizes does the 84683 have?
The air inlet is 1/4 in NPT female. The material outlet is also 1/4 in NPT female.
What is included in the 84683 package?
The package includes an air coupler, nipple, and volume elbow union. Hoses are not included in the 84683 package listing.
What is the maximum output pressure?
Lincoln does not publish a maximum output pressure for the 84683 package. Confirm the output pressure from the pump nameplate and the quotation.
What series is this pump?
The catalog listing does not confirm any series name for the 84683 package. Verify the series from the pump nameplate before ordering service parts.
Is this a Lincoln factory package?
Lincoln is a trademark of its respective owner. This is an aftermarket pump package, not manufactured, sponsored, or endorsed by Lincoln.
Who builds and supports this unit?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
84683 and 84668 are Lincoln designations shown for cross-reference identification only. Contact us for a quotation.
