891810-799008 Unit Pump Repair Kit for 799-Series Unit Pump

891810-799008 Unit Pump Repair Kit for 799-Series Unit Pump

The 891810-799008 Unit Pump Repair Kit is a Rayfuel aftermarket repair kit intended for professional service of selected 799-Series Unit Pump. It belongs to Rayfuel’s diesel injection repair kit range and is supplied as the repair-kit components shown in the featured image. The listing is not for a complete unit pump, even if a complete injector or pump appears in the image as a fitment reference.

Product Identification

• Primary Part Number: 891810-799008
• Cross Reference: No separate cross-reference was supplied
• Application: 799-Series Unit Pump
• Product Type: Unit Pump Repair Kit
• Supplied Brand: Rayfuel

The repair kit is supplied under the Rayfuel brand as an aftermarket service-parts set. Part numbers shown in this listing are identification and fitment references. They do not indicate that the supplied aftermarket kit was manufactured or authorized by the referenced system or equipment manufacturer.

For general technical background on pump, unit-injector, unit-pump, and common-rail layouts, see the DieselNet diesel fuel injection overview. This reference explains system principles only and is not a product fitment source.

Application and Fitment

This kit is cataloged for selected 799-Series Unit Pump configurations. Diesel injection components can vary by engine version, market, production date, pump or injector revision, and previous repair history. A shared engine family or similar external appearance does not by itself confirm interchangeability. Compare the primary part number, every supplied cross-reference, the old component marking, and the arrangement of the pictured repair parts before ordering.

The catalog reference for this item is 891810-799008. If the number on the old pump or injector differs, send Rayfuel a clear photo of that number together with the engine or equipment model. The image should also be compared carefully because repair-kit contents can differ between component revisions that use similar names.

Repair Kit Contents and Scope

The supplied set consists only of the service components visible in the product image. Depending on the photographed kit, these may include seals, O-rings, gaskets, washers, springs, pins, screws, plugs, or other small repair parts. This description does not promise a component that is not visible in the photographed set. A complete injector, unit pump, high-pressure pump, gear pump, or other full assembly shown beside the parts is provided for compatibility reference only and is not included.

A repair kit is intended for a serviceable parent component. It cannot correct cracked housings, damaged threads, worn hard parts, failed electronic elements, corroded sealing surfaces, or damage outside the scope of the supplied pieces. Inspect the parent component before disassembly and confirm that a repair-kit service is appropriate for the diagnosed condition.

Workshop Preparation and Installation

Installation should be carried out by a qualified diesel fuel-system technician in a clean work area. Record the original assembly orientation, keep matched components together, and prevent dirt, lint, moisture, or metal particles from entering fuel passages. Use the correct service procedure, tightening sequence, torque values, lubricants, measuring tools, and test equipment for the exact pump or injector being repaired.

After assembly, perform the inspection, leak check, calibration, or bench test required for that component type before returning it to service. Do not assume that electronic coding is required for every application, and do not assume that replacing seals alone resolves an underlying mechanical or electrical fault. Diagnosis and post-repair testing remain the responsibility of the installer.

Before You Order

Please confirm OE number, engine model or old part photos before ordering. Check the quantity and shape of every visible part in the featured image. If any reference, application wording, or photographed component differs from the old unit, pause the order and request a fitment review through the Rayfuel contact page. Price, packed weight, and packed dimensions remain intentionally unset until confirmed.

Rayfuel Supply and Support

The 891810-799008 Unit Pump Repair Kit is offered for diesel repair workshops, rebuilders, wholesalers, distributors, and export customers that need clearly identified aftermarket service parts. Rayfuel can review part-number photos, component markings, and quantity requirements before shipment. Export packaging and batch inquiries can be discussed after fitment and kit contents are confirmed.