The Cat SR121 Snow Blower is a powerful, high-capacity attachment designed for skid steer loaders, compact track loaders, and compact wheel loaders. From a mechanic’s point of view, this model is built for operators who deal with serious winter conditions and need dependable performance in deep or heavy snow. It features a two-stage system – the auger pulls in and breaks up the snow while the impeller throws it out through the chute with impressive force. With a wider intake and higher flow requirements than the smaller SR118, the SR121 moves more snow in less time, making it ideal for larger jobs like parking lots, city streets, or long access roads.
Cat SR121 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) |
Cat SR121 Specs
| Maximum Throw | 40 ft (12 m) |
| Snow Blower Weight | 1105 lb (501 kg) |
| Auger Diameter | 18 in (457 mm) |
| Impeller Fan Diameter | 25 in (635 mm) |
| Impeller Fan Width | 8.7 in (222 mm) |
| Chute Rotation | 270° |
Cat SR121 Required Hydraulics
| Required CAT Hydraulics | Standard Flow |
| Optimal Hydraulic Flow | 20 – 23 gal/min (76 – 87 L/min) |
| Optimal Hydraulic Pressure | 2800 – 3300 psi (19300 – 22750 kPa) |
The unit runs on a high-flow hydraulic system, so it’s meant for machines with stronger hydraulics capable of maintaining consistent pressure and volume. The chute rotation and deflector are fully hydraulic, giving the operator smooth control over where the snow is thrown – up to around 40 feet under good conditions. The offset chute design also gives better visibility from the cab, which is something operators appreciate during long runs or when working around obstacles. It’s a well-balanced attachment, but due to its weight and size, it’s important that the host machine has the right lift capacity and hydraulic output to handle it efficiently.
Cat SR121 Compatibility
| Skid Steer Loaders | Cat 226D3, 232D3, 236D3, 242D3, 246D3, 250, 260, 262D3, 270, 270 XE |
| Compact Track Loaders | Cat 239D3, 249D3, 255, 265, 275, 275 XE, 285, 285 XE, 299D3, 299D3 XE, 299D3 XE Land Management |
| Compact Wheel Loaders | Cat 906, 908, 907, 903D |
From a maintenance standpoint, Cat kept things practical on the SR121. The auger and impeller can be reversed hydraulically to clear jams without leaving the cab, and the cutting edge and skid shoes are bolt-on and reversible, which makes replacements quick and easy. The build quality is what you’d expect from Caterpillar – heavy steel construction, durable components, and smart service access points. If maintained properly, these blowers will last through many winters with minimal downtime.
Overall, the SR121 is a solid choice for anyone looking to clear large areas quickly and reliably. It delivers professional-grade results, provided it’s paired with the right machine and maintained regularly. For contractors, municipalities, or anyone managing heavy snowfall, this attachment is a workhorse that performs exactly the way a Cat tool should – strong, efficient, and built to last.
