The SR321 is a heavy-duty snow-blower built to pair with skid steers, compact track loaders and compact wheel loaders essentially machines with high-flow hydraulics. From my many seasons working in cold-weather attachments, I can tell you this model is engineered for serious winter jobs – clearing large parking lots, driveways, access roads when the snow gets heavy and compacted.
With a roughly 77-inch intake width and a robust built-weight of about 460 kg, it’s built to push big volumes of snow efficiently.
Cat SR321 Dimensions
| A. Intake Width | 77 in (1942 mm) |
| B. Overall Width | 86 in (2181 mm) |
| C. Cutting Height | 34 in (867 mm) |
| D. Overall Height | 73 in (1843 mm) |
| E. Overall Length | 37 in (951 mm) |
| Overall Height with Truck Chute | 130 in (3302 mm) |
On the service side, the SR321 packs in smart features that save downtime. The two-stage design with serrated auger and high-capacity impeller – lets the machine dig into dense or icy snow and then loft it out of the way. The chute rotates around 270 degrees so you can direct the throw to the side or front without repositioning the machine. The auger and impeller can also reverse hydraulically to clear blockages, which means less time climbing out and troubleshooting.
Cat SR321 Specs
| Maximum Throw | 40 ft (12 m) |
| Auger Diameter | 18 in (457 mm) |
| Impeller Fan Diameter | 25 in (635 mm) |
| Impeller Fan Width | 8.7 in (222 mm) |
| Chute Rotation | 270° |
| Snow Blower Weight | 1142 lb (518 kg) |
What I always check when deploying this kind of attachment: first, the machine absolutely must have the hydraulic flow and pressure to match it the SR321 calls for high-flow (around 100-125 L/min) at around 200-280 bar.
Cat SR321 Required Hydraulics
| Required CAT Hydraulics | High Flow or HF XPS |
| Optimal Hydraulic Flow | 26 – 33 gal/min (100 – 125 L/min) |
| Optimal Hydraulic Pressure | 2800 – 4100 psi (19300 – 28270 kPa) |
Next, matching the loader or wheel machine’s lift capacity and stability is key: the weight up front and the forces from throwing snow mean the host machine must be rated accordingly. Also, regular maintenance on wear items like the bolt-on cutting edge, skid shoes and chute liner makes a big difference in keeping performance consistent.
Cat SR321 Compatibility
| Skid Steer Loaders | Cat 216, 226, 226B Series 2, 226D, 228, 232, 232D, 236, 236D, 242, 242B, 242B Series 2, 242B Series 3, 242D, 246, 246B, 246C, 246D, 248, 248B, 252, 262, 262C, 262C Series 2, 262D, 268B, 272C, 272D, 272D XHP, 272D2, 272D2 XHP, 272D3, 272D3 XE |
| Compact Track Loaders | Cat 239D, 249D, 259B Series 3, 259D, 259D3, 279C, 279C Series 2, 279D, 279D3, 289C, 289C Series 2, 289D, 289D3, 299C, 299D, 299D XHP, 299D2, 299D2 XHP |
| Compact Wheel Loaders | Cat 906H, 906M, 906M Ag Handler, 907H, 907M, 907M Ag Handler, 908H, 908M, 908M Ag Handler |
If you’re looking for a snow-blower that handles demanding conditions and integrates with heavy-duty loader platforms, the SR321 is a reliable choice. Just make sure your machine is up to the task hydraulically and structurally, and you’ll have a tool that works when winter hits hard.
