CAT 289C 289D 299C Front Idler Wheel OEM 536-3551 304-1878
1. Product Overview
If you're looking for a replacement front idler wheel for your CAT 299D compact track loader, you've come to the right place. This is the genuine deal—brand new and ready to roll. The part number is 304-1878, and it’s made from top-notch steel, with a surface that's been hardened to take a beating. It weighs around 10kg and ships in a sturdy box measuring 30cm x 20cm x 20cm. Trust us; this baby is built to last!
2. Product Features
Let's dive into what makes this idler wheel a standout:
Durability: We didn't cut corners here. The steel we use is tough as nails, and the surface hardening process means it can handle the roughest jobs without flinching.
Precision: Every wheel is machined to perfection. It fits like a glove on your CAT 299D, ensuring smooth operation and minimal downtime.
Compatibility: This wheel is tailor-made for your machine. No need to worry about compatibility issues—it’s a perfect match.
Easy Installation: We've kept things simple. You can replace it in no time, and we even provide detailed instructions if you need a helping hand.
3. Product Images
Check out the high-quality images below. We’ve got shots from every angle, so you can see exactly what you’re getting.

4. Technical Specifications
Here are the nitty-gritty details you need to know:
Wheel Diameter: 250mm
Wheel Width: 100mm
Bearing Type: High-load capacity sealed bearing (we use only the best)
Bearing Model: [Specify the exact model]
Hub Material: High-strength steel
Seal Type: Double-lip oil seal
Thread Size: M12 x 1.5
Mounting Hole Distance: 150mm
Operating Temperature Range: -30°C to +80°C
5. Models we can supply
ITEM | MODEL | PRODUCTS | PART NUMBER | WEIGHT |
1 | Caterpillar 239D / DR/249D / D3/259B3/259D/259D3/239 DLRC/249 DLRC/259 D3/259 DLRC | Sprocket(15T12H) | 304-1870 | 19.50 KGS |
Caterpillar 239D / 249D/239 DLRC/249 DLRC | Bottom Roller | 420-9801 | 20.80 KGS | |
Caterpillar® 239D/249D/239 D3/249 D3/239 DLRC/249 DLRC | Rear Idler | 420-9805 | 29.40 KGS | |
Caterpillar® 239D/249D/239 DLRC/249 DLRC | Front Idler | 536-3554/420-9803 | 26.20 KGS | |
2 | Caterpillar® 259B3/259D/259-D3/279C/279D/279-D3/289C/289D/299C/299-D3 | Bottom Roller | 536-3549/304-1890/389-7624 | 28.00 KGS |
Caterpillar 279C/279C2/279D/279-D3/289C/289D/289D3/299C/299D3/259-B3/259D/259D3 | Rear Idler | 536-3550/304-1894 | 47.00 KGS | |
Caterpillar® 259B3/259D/259-D3/279C/279D/279-D3/289C/289D/299C/299-D3 | Front Idler | 536-3551/304-1878 | 40.30 KGS | |
Caterpillar 259B3/259D/259D3/259DLRC/279C/279C2/279D/279D3/279DLRC/289C /289C2/289D/289D3/289DLRC/299D/299DXHP/299C/299D2XHP/299D2/299D3 | Triple Idler | 536-3552/348-9647 | 54.80 KGS | |
Caterpillar® 279C/279C2279D/279-D3/289C/289C2/289D/289-D3/299C/299D/299DR/299-D3/299-D3 XE | Sprocket(17T12H) | 304-1916 | 24.00 KGS |