This is the IHI F41CAD-S0172B, a new RHF4 turbocharger made by IHI for the Yanmar 4TNV86CT diesel engine. IHI marks it with the code AYFM and the spec numbers VA420172 to VD420172. It crosses to Yanmar 129C01-18010 and 129C01-18011 and to John Deere MIA884651, MIU884651 and MIA882034. Catalogs list it for the John Deere 4052M, 4066M and 4066R compact utility tractors and the 316GR, 317G and 318G skid steer and compact track loaders. It is a complete new turbo, not a rebuild.

Small Yanmar turbos are replaced for shaft play, oil in the intake, low boost, black smoke under load and a whistle or siren noise. Dust past the air filter and long oil change intervals are the usual causes, so check both before you fit the new turbo.

Specifications

Fits / Applications

• Yanmar 4TNV86CT diesel engine
• John Deere 4052M, 4066M and 4066R compact utility tractors
• John Deere 316GR, 317G and 318G skid steer and compact track loaders
• John Deere turbo number MIA884651, MIU884651 or MIA882034
• IHI tag code AYFM, IHI spec numbers VA420172 to VD420172
• Call with the machine model and engine serial number to confirm

Fit new gaskets, prime the turbo with clean engine oil before the first start, and check the oil feed line and drain for restriction. Change the engine oil and the air filter if the old turbo failed from oil or dust.

Part Numbers & Cross Reference

IHI F41CAD-S0172B  ·  IHI spec VA420172  ·  IHI spec VB420172  ·  IHI spec VC420172  ·  IHI spec VD420172  ·  IHI code AYFM  ·  Yanmar 129C01-18010  ·  Yanmar 129C01-18011  ·  John Deere MIA884651  ·  John Deere MIU884651  ·  John Deere MIA882034  ·  IHI, G suffix version F41CAD-S0172G

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Does the F41CAD-S0172B replace John Deere MIA884651?

Yes. Three catalogs cross this IHI turbo (code AYFM, VA420172) to John Deere MIA884651 and Yanmar 129C01-18010.

Which John Deere machines use it?

Two catalogs each list the 4052M, 4066M and 4066R compact utility tractors and the 316GR, 317G and 318G loaders. Other models are named by one catalog only, so go by part number MIA884651 or the AYFM code on the old turbo, or call 530-668-0818 with the machine model and serial number.

How do I know my Yanmar takes this turbo?

Look at the IHI tag on the old turbo. It should show the code AYFM or a number from VA420172 to VD420172. You can also send us the engine model and serial number.

Will it fit other Yanmar 4TNV engines?

We list it for the 4TNV86CT only. Other 4TNV engines use other IHI numbers, so send us the tag number from your old turbo.

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.