Slother 12V Electric Fuel Feed Pump 129612-52100 — Direct Replacement for Yanmar, Copper Windings

The Slother 12V Electric Fuel Feed Pump 129612-52100 is a direct replacement fuel pump engineered to restore reliable fuel delivery for compatible Yanmar, Takeuchi, Hitachi and select John Deere engines and machines.

This replacement pump is designed for service and repair of diesel small engines and compact equipment that originally used part numbers 129612-52100 or 129322-77401. Built with heavy-gauge materials and pure copper windings, the unit is intended to match OEM fitment on multiple 3TNV and 4TNV series Yanmar engines, several Takeuchi and Hitachi mini-excavator models, and a range of John Deere compact loaders and tractors. The pump ships pre-lubricated and includes one unit per package.

Which engines and equipment does this pump fit?

This pump is compatible with many Yanmar 3TN and 4TNV family engines and specific compact equipment models listed by manufacturers. Always confirm compatibility with your engine serial or OEM part listing before ordering to avoid fitment issues.

• Yanmar: 3TN100L, 3TNV88, 4TNV84, 4TNV88, 4TNV94, 4TNV98, 4TNE98 and related variants
• Takeuchi: TB230 series compact excavators
• Hitachi: ZX30U-2, ZX35U-2 mini-excavators
• John Deere: Compatibility with many compact loaders and tractors (examples include 35D, 50D, 17G, 324E series, 3036E and select compact utility models)

How is the pump constructed and what materials improve longevity?

The Slother pump uses pure copper wire in the motor windings for efficient electrical performance and consistent torque under load. External metal parts employ anti-aging alloys and treated finishes to resist corrosion and wear common in fuel system environments.

• Pure copper windings for stable electrical conductivity
• Durable metal housing with anti-aging treatments
• Factory lubrication inside the assembly for initial protection
• Tested for fit and basic function before packing

What should I expect on receipt and how do I install it safely?

New pumps are shipped with a small amount of protective lubricating oil inside the body; this may smell faintly like fuel but is normal and indicates the unit was protected during transit. Installation should follow manufacturer procedures: disconnect battery power, relieve fuel pressure, swap the pump and gaskets, and verify electrical connections and fuel lines are secure before testing.

• Oil inside the pump is protective lubricant—normal and not an indicator of prior use
• Disconnect battery and relieve system pressure before replacement
• Check part numbers and mounting points for correct fit
• After installation, inspect for leaks and proper fuel flow at low idle

What part numbers and compatibility codes does this replace?

This unit is supplied as a replacement for multiple OEM codes so it can serve as a direct swap in many maintenance situations. Verify any cross-reference numbers against your equipment’s service manual to confirm the match.

• Primary replacement numbers: 129612-52100 and 129322-77401
• Other cross references: YM129612-52100, 485510011, AM876266, AT318139, 14520577, 7016409
• Sold as one pump per package for straightforward garage replacements
• Contact support for help with uncommon cross-reference queries

Who is this for: This Slother 12V electric fuel feed pump suits mechanics, fleet-maintenance teams, and equipment owners maintaining Yanmar-powered compact excavators or tractors, Takeuchi and Hitachi mini-excavators, and a range of John Deere compact machines. Choose this unit if you need an affordable, ready-to-install replacement that matches common OEM numbers and is constructed with robust materials for longer service life.