Paccar D84-1000-6122180 Serpentine Belt
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Complete Guide to the Paccar D84-1000-6122180 Serpentine Belt (12PK2180)
If you’re driving a Kenworth or Peterbilt and need to replace your serpentine belt, the part number D84-1000-6122180 should be on your radar. This 12-rib Poly V-belt is a direct OEM replacement and fits a wide range of commercial trucks. In this post, we’ll break down everything you need to know about this belt — including fitment, specs, cross-reference numbers, and where to buy it online.
🔧 What Is the D84-1000-6122180 Belt?
The D84-1000-6122180 is a 12-rib Poly V (serpentine) belt with an outside length of approximately 2180mm (85.8 inches). Manufactured for Paccar (used in Kenworth and Peterbilt vehicles), this belt ensures proper function of your truck’s accessory systems — such as the alternator, fan, and A/C compressor.
It’s built for durability, minimal slippage, and consistent tension, which are essential for heavy-duty trucks operating in tough environments.
⚙️ Key Specifications
| Feature | Details |
|---|---|
| Part Number | D84-1000-6122180 |
| Alternate ID | 12PK2180 |
| Type | Poly V / Serpentine |
| Ribs | 12 |
| Length | 2180 mm (85.8") |
| Material | Reinforced engineered rubber |
| Style | Standard (not cogged), OEM-quality |
🔁 Cross Reference & Equivalent Part Numbers
This belt has several direct equivalents from trusted aftermarket brands:
- Gates: K120858, K120858HD, K120858HDV
- Dayco: 5120858
- Fleetrite: FLTBT858K12
- NewStar: S-36162
- OE Part Numbers: 4120858X, PTR-D84-1000-6122180
🚚 Fitment Guide
The D84-1000-6122180 belt fits various Kenworth and Peterbilt trucks, including:
- Kenworth Models: T660, T680, T700, T800, T880, C500, T2000
- Peterbilt Models: 367, 386, 389, 567, 579
(Models vary by year and engine configuration – always verify fitment.)
🛠️ Why Use This Belt?
- ✅ OEM-quality for precise fit and function
- ✅ Designed to handle high tension and extended mileage
- ✅ Suitable for long-haul, fleet, and severe-duty operations
- ✅ Backed by brand warranties and consistent performance
📦 In the Box
- (1) D84-1000-6122180 12-Rib Serpentine Belt – Factory Sealed
💰 Where to Buy the D84-1000-6122180 Online
Here are some reliable online stores where you can purchase this belt:
🧰 Pro Tip: Always Measure Before You Replace
Even with a matching part number, it’s smart to check your old belt’s length and rib count before ordering. If your system has been modified, or if your vehicle uses a long-route belt, you might need a slightly different size like 12PK2310 or 12PK2250.
Final Thoughts
The D84-1000-6122180 is a high-quality, OEM-grade serpentine belt trusted by technicians and fleet managers alike. Whether you’re doing preventative maintenance or replacing a failed belt on the road, this part offers reliable performance and easy fitment across many Peterbilt and Kenworth models.
Need help finding the right belt for your truck?
💬 Contact us — we’ll cross-reference your current part, check dimensions, and help you find the most affordable option.
