This is the BorgWarner 178045, a new S100 turbocharger, not a rebuild, for the John Deere 4045T and 4045H 4.5L diesels. It is the S1B version of the BorgWarner (Schwitzer) S100 with an open volute turbine housing, and catalogs list it mostly for 2000 to 2011 machines. Those include the 450H, 450J, 550H, 550J, 650H and 650J dozers, the 310K, 310SK, 310L and 410K backhoe loaders, the 444J loader, the 120, 120C and 160C LC excavators and the 3800 telescopic handler. It replaces John Deere RE508970, RE515927, RE517786 and the other numbers in the cross reference list. These machines ran more than one turbo, so match the number on your old turbo tag before you order.

Low boost, black smoke under load, oil in the charge pipes, a whistle or siren sound, or shaft play you can feel at the compressor wheel are the usual reasons to change a turbo. Find out why the old one failed first. Dirty or late oil, a restricted oil feed or drain line and dust getting past the air filter will take out a new turbo the same way.

Specifications

Fits / Applications

• John Deere 4045T and 4045H 4.5L diesels
• Commonly found on 2000 to 2011 machines
• John Deere 450H, 450J, 550H, 550J, 650H and 650J dozers
• John Deere 310K, 310SK, 310L and 410K backhoe loaders
• John Deere 444J loader and 444JR
• John Deere 120, 120C and 160C LC excavators
• John Deere 3800 telescopic handler
• These machines used more than one turbo. Match the number on your old turbo tag before ordering

This turbo has 1.5 in oil drain bolt spacing. If your old turbo has a 2 in oil drain flange, you also need John Deere oil drain line RE509555 and two M6 bolts. Change the engine oil and filter, check the oil feed and drain lines for restriction, and prime the turbo with clean engine oil through the oil inlet before the first start.

Part Numbers & Cross Reference

BorgWarner 178045  ·  BorgWarner remanufactured version 478045  ·  John Deere RE501155, RE506802, RE508968, RE508970, RE508975, RE509572, RE509640, RE509645, RE515927, RE515977, RE515981, RE516011, RE517786, RE518241, RE518463, RE518976, RE520459, RE520461, RE524801, RE526871, RE526872, RE526873  ·  John Deere SE numbers SE501155, SE501157, SE501671, SE501674  ·  John Deere numbers also listed for the S2A 318615 (check the oil drain flange) RE59379  ·  Older BorgWarner numbers 173182, 173183, 173404, 173587, 173685, 173738, 174103, 174104, 175295, 175296, 175297, 175298, 175299, 175300, 318606, 318616, 318770  ·  Garrett 466003-0003

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

What does the BorgWarner 178045 fit?

It fits the John Deere 4045T and 4045H 4.5L diesels. Catalogs list it for the 450H, 450J, 550H, 550J, 650H and 650J dozers, the 310K, 310SK, 310L and 410K backhoes, the 444J loader, the 120, 120C and 160C LC excavators and the 3800 telehandler.

My old turbo has a 2 inch oil drain flange. Will 178045 work?

This turbo has 1.5 inch oil drain bolt spacing. Catalogs say it goes on with John Deere oil drain line RE509555 and two M6 bolts. Tell us what is on your engine now and we will confirm it before you order.

Is the 178045 the same as the BorgWarner S2A 318615?

They are two different part numbers for the 4045. Catalogs list 178045 with the 1.5 inch oil drain flange and 318615 with the 2 inch flange. Send us the number on your old turbo and we will tell you which one you need.

What John Deere numbers does 178045 replace?

It replaces RE508970, RE515927, RE517786 and the other John Deere numbers in the cross reference list on this page. If yours is not there, call 530-668-0818 and we will check it.

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.