Holset HX35W Turbocharger, part number 4044890H, for Cummins QSB (Komatsu grader application seen in invoices). Supplied by Valley Fuel Injection & Turbo, a Northern California diesel specialist and authorized dealer since 1993, and shipped anywhere in the country.

Specifications

New, Not Rebuilt

This is a factory new Holset unit, not a rebuilt or “will-fit” turbo from an unknown shop. There is no core to return and no gamble on what somebody else did to it. Factory new is the right call when a remanufactured unit is not offered for your number, when no core is available, or when you simply want a unit with zero hours on it.

Signs Your Turbo Needs Replacing

• Loss of boost, low power, or long spool-up
• Shaft play, or a wheel that has contacted the housing
• Oil in the intake or exhaust, or blue smoke under load
• Whining, siren-like noise that rises with engine speed
• Cracked housing, or a turbo that has ingested debris

Worth saying plainly: a surprising number of “bad turbo” complaints are actually fuel problems. We test injection pumps and injectors every day, so if your symptoms point that direction, we will tell you before you spend money on a turbo.

Cross Reference: Part Numbers This Replaces

If your old unit, parts book, or dealer quote shows any of the numbers below, this is the part that supersedes or interchanges with it. There are 16 known references for 4044890H:

Do not see your number? That does not always mean it will not fit. Call 530-668-0818 and we will check it against the factory catalog.

Why Buy It From Valley Fuel Injection

We are not an order taker with a warehouse. We have been rebuilding and calibrating diesel fuel systems in Woodland since 1993, we are an authorized dealer for the people who actually build these units, and we ship nationwide. You get a genuine part, a real warranty, and someone on the phone who works on these engines.

Need a different turbo? We source almost anything: see turbocharger sourcing or browse all turbochargers. Chasing a fuel problem instead? See our injection pump and injector rebuild services.