Fuel Lift Pump 129100-52100 for Komatsu 3D84 3D78N 3D84E 4D84E 4D84 4D88E S3D84

Fuel Lift Pump for Komatsu

This fuel lift pump, referencing OEM cross-reference 129100-52100, delivers reliable fuel delivery for Komatsu industrial and agricultural diesel engines. It is a direct replacement fuel lift pump designed to maintain proper fuel pressure and volume to the injection system. This fuel lift pump supports Komatsu engine models including the 3D84, 3D78N, 3D84E, 4D84E, 4D84, 4D88E, and S3D84.

Overview

This fuel lift pump for Komatsu engines ensures consistent fuel flow from the tank to the injection pump, supporting reliable starts and steady operation. It is built for Komatsu 3D84, 3D78N, 3D84E, 4D84E, 4D84, 4D88E, and S3D84 diesel engines as a direct mechanical replacement. The pump is designed to match the performance of the original 129100-52100 unit.

Built For Performance

• Direct replacement for Komatsu part number 129100-52100
• Durable die-cast housing resists corrosion and vibration
• Precision-machined plunger ensures consistent fuel delivery
• Integrated strainer protects the injection system from debris
• Mechanical diaphragm design offers reliable low-pressure fuel supply

Fits These Machines

• for Komatsu 3D84 engine
• for Komatsu 3D78N engine
• for Komatsu 3D84E engine
• for Komatsu 4D84E engine
• for Komatsu 4D84 engine
• for Komatsu 4D88E engine
• for Komatsu S3D84 engine

On-The-Job Use

• Used in excavators and compact loaders powered by Komatsu diesel engines
• Supports generators and pumps driven by 3D84 and 4D84 series engines
• Maintains fuel pressure for agricultural tractors and compact equipment
• Commonly installed during engine overhaul or fuel system service

Specs At A Glance

Good To Know

Q: Will this fuel lift pump fit my Komatsu 3D84 engine? A: Yes, it is specifically designed for the Komatsu 3D84 and other listed 3D and 4D series engine models. Always verify your engine serial number before ordering.

Q: Does this pump require any special tools to install? A: No, standard hand tools are sufficient for removal and installation. Confirm the mounting bolt pattern matches your existing pump configuration.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.