C9 · HEUI hydraulic electronic unit injector
235-5261 Diesel Fuel Injector — CAT C9 (HEUI)

New (reproduction) · Supplied by BOSTEN · MOQ 1 pc (factory pack: 6 pcs)
One of the anchor part numbers of the C9 HEUI family. The full C9 cross-reference table (50+ numbers) lives on the C9 application page — this page lists only the numbers most often quoted for this unit.
Fitment is listed, not guaranteed. Applications are compiled from catalog and cross-reference data. Fitment is confirmed by our team against the old part number and engine serial before quotation — not an automated lookup.
Specifications
Identity, fitment and packing
| Part number | 235-5261 |
|---|---|
| Condition | New (reproduction) |
| Fuel system | HEUI hydraulic electronic unit injector |
| Cross-reference | 267-3360 235-5518 20R1917 553-2592 10R1582 |
| Unit weight | 1.25 kg |
| Packing | 6 pcs / box · 10.8 kg · 350 × 280 × 400 mm |
| MOQ | 1 pc (factory pack: 6 pcs) |
| Warranty | Warranty terms are confirmed per order and stated on the quotation. |
Fitment — listed applications
- CAT C9 (HEUI) — excavators, motor graders
Identification list only — confirm by the old part number before ordering.

Before dispatch
Checked, photographed, packed
Units are inspected on named test equipment before packing. Photos of your actual goods are taken before shipment, and a test report for the ordered batch is available on request.
Quality & testingProduct FAQ
Questions buyers ask about 235-5261
Is 235-5261 new, remanufactured or used?
235-5261 is supplied new, as an independent aftermarket reproduction built to the fitment and function of the part it replaces. It is not a used or reconditioned unit, and it is not an OEM part.
How do I confirm 235-5261 fits my engine?
Fitment is listed, not guaranteed. Listed applications: CAT C9 (HEUI) — excavators, motor graders. Send the number stamped on your old unit, the engine model and serial, and — where the stamping is worn — a photo of the old part. We check it against the catalog manually and confirm in the quotation. The machine or engine model alone does not select the part.
What is the minimum order quantity for 235-5261?
The listed minimum order is 1 pc (factory pack: 6 pcs). Factory packing is 6 pc per box, 10.8 kg. If you need a different quantity for a trial or a mixed order, ask — what we can actually ship is confirmed in the quotation, not on this page.
Is 235-5261 an OEM Caterpillar part?
235-5261 is an independent aftermarket replacement part, manufactured for BOSTEN and sold under our own brand. It is not a Caterpillar OEM part, and BOSTEN is not an authorized Caterpillar distributor or dealer. Caterpillar names and part numbers appear on this page for identification and cross-reference only.
Can you check my old part number against 235-5261?
The main references we list for this part are 267-3360 / 235-5518 / 20R1917 / 553-2592 / 10R1582. A shared number in a cross-reference list is identification, not a guarantee of interchange, so we check the number on your old unit against the catalog before quoting.
What warranty applies to 235-5261?
Warranty terms are confirmed per order and written on the quotation before payment. Different product lines and conditions carry different periods, so the terms for this part are not printed here as a generic number. Damage from contaminated oil or fuel and incorrect installation are excluded under the terms confirmed for your order.
Which fuel system does 235-5261 belong to?
Fuel system: HEUI hydraulic electronic unit injector. Injectors from a different fuel system do not interchange with 235-5261, even where the engine family name looks similar. The engine plate plus the number on your old injector is what tells us which system your engine actually runs.
Terms behind these answers: warranty & shipping · testing & packing. Fitment questions go to our technical team.
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