No factory photo on file yet — showing the parts diagram. Real OEM photography drops in when available.
Top 50 sellerFits: New Holland 144, New Holland 166
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
Overview
Genuine New Holland idler fitted on the New Holland 166 and 144, where it routes and tensions the belt. Compatible with 2 New Holland models.
Specifications
Compatibility
Type your model to confirm it fits — or browse the full compatibility list below.
| Model | Series |
|---|---|
| 166 | INVERTER |
| 144 | INVERTER |
Not sure it fits? Browse the full parts catalogue to check every listed part.
Parts diagrams
Every diagram this part appears in — jump straight to its callout, or browse the whole assembly. Each diagram opens with every part numbered, and each callout links back to its own part page.
Part guide
New Holland 850644 is the idler Clinton Tractor supplies for this application. It is listed as fitting 2 New Holland models.
Fits: New Holland 144, New Holland 166. Commonly ordered for the 166, 144. If your machine isn't listed, check the serial number before ordering.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
Machine specifications
Verified equipment data for the models in the compatibility list — match yours before ordering.
| Specification | New Holland 144 |
|---|---|
| Weight | 3,001 lbs |
| Rear PTO | independent |
| 3-pt hitch | I |
| Fuel capacity | 7.9 gal |
| Rear tires | 14.9-24 |
Questions
Quick answers to what operators ask most before they order this part.
It fits 2 New Holland models, including the 166 and 144.
Yes — 850644 is a genuine New Holland OEM idler, supplied new by Clinton Tractor.
Match your model and serial number against the fitment list on this page — it covers the New Holland 166 — or send your serial to Clinton Tractor and we'll confirm 850644.
Reviews
Bought this idler? Share how it worked out to help the next operator choose with confidence.
No seeded stars — ratings appear only from real submissions.
