ACMOC
Login
ACMOC
D8H Turbos 4N5645 vs 4N4441

D8H Turbos 4N5645 vs 4N4441

Showing 1 to 3 of 3 results
mlauck1
Topic Author
Offline
Send a private message to mlauck1
Posts: 17
Thank you received: 0

Hello.

The turbo on our high horse D8H (4N5645) is not rebuildable and I cannot find another anywhere. I see on later serial numbers 46A28408 and up, cat lists 4N4441 as the part number for the turbo, which seems to be available online. Can anyone tell me, even if I need to modify exhaust etc. if 4N4441 would work on my engine? I believe my engine originally came out of a 46A18xxx serial tractor. Thank you.

Please log in or create an account to join the conversation.
Tue, Apr 28, 2026 4:18 PM
Old Magnet
Offline
Send a private message to Old Magnet
Posts: 16,779
Thank you received: 45

Doesn't seem to be any shortage of 4N5645....

https://www.machinerytrader.com/parts/search?Keywords=4N5645

Please log in or create an account to join the conversation.
Tue, Apr 28, 2026 4:24 PM
mlauck1
Topic Author
Offline
Send a private message to mlauck1
Posts: 17
Thank you received: 0

How come when I search, I never had them come up? lol Thanks OM, I’ll start here again. Always so helpful.

Please log in or create an account to join the conversation.
Tue, Apr 28, 2026 4:48 PM
mlauck1
Topic Author
Offline
Send a private message to mlauck1
Posts: 17
Thank you received: 0
Reply to Old Magnet:

Doesn't seem to be any shortage of 4N5645....

https://www.machinerytrader.com/parts/search?Keywords=4N5645

Just called all of these. Anyone who actually answered said sold out and a few wouldn’t even answer. Union Tractor close to home answered and is looking, but I had called another branch earlier without any luck. Hard to find.

Please log in or create an account to join the conversation.
Tue, Apr 28, 2026 5:47 PM
Showing 1 to 3 of 3 results
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

Lake Goldsmith 127th Rally

Chapter Nineteen

| 1234 Carngham - Lake Goldsmith Road ​Lake Goldsmith VIC 3373

HIGRO JUBILEUMEDITIE!

| “De Domelaar” Gebr .V.d. Heiden Domelaarsweg 3 7475 MARKELO Netherlands

Chapter 2 AGM

Chapter Two

| Folds Farm, Godshillwood, Fordingbridge, Hampshire, SP6 2LU
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I also joined a year ago. had been on here a couple of times as a non-member and found the info very helpful so I got a one year subscription (not very expensive at all) to try it out. I really like all the resources on here so I just got a three year. I think its a very small price for what you can get out of this site."
-Jason N

Join Today!