Chicago Pneumatic CPS 185 KDU Towable Rotary Screw Air Compressor – 185 CFM, 49 HP Kubota

The Chicago Pneumatic CPS 185 KDU T4F towable rotary screw air compressor is the workhorse 185 CFM diesel that has set the standard for utility crews, line trucks, pipeline contractors, and general construction fleets across North America. Delivering 185 CFM at 100 PSI from a 49 HP Kubota V2403 Tier 4 Final diesel, the 185 KDU is engineered around CP's direct-driven C111 airend — no gearbox, no parasitic losses, and a measurably lower fuel burn than belt-driven and gear-driven competitors in the same CFM class.

What 185 CFM gets you on the jobsite

185 CFM is the most common rental and contractor-owned CFM size in North America for good reason: it's the smallest compressor that comfortably runs two ¾-inch pneumatic tools simultaneously (two 60-lb breakers, an impact wrench and an air drill, a chipping hammer and a rivet buster), and it's large enough for single-nozzle sandblasting up to about a #6 nozzle at 100 PSI. The 185 KDU delivers that capability with the lowest fuel-per-CFM rating in its class.

Spec sheet

Built for utility crews and line trucks

The 185 KDU's footprint and skid layout make it a natural fit on Class 4-6 utility bodies — which is why so many electric co-ops, telecom contractors, and municipal water/wastewater fleets spec it as their default truck-mounted air supply. Direct-drive design means fewer moving parts to maintain and a measurably quieter operating profile than belt-driven competitors.

Common applications

• Electric utility line work — pole setting, anchor installation, transformer hot-stick operations
• Telecom and cable — pneumatic blowers for fiber installation and conduit jetting
• Pipeline construction — pneumatic valve actuation, line clearing, pneumatic test pumps
• General contractor — multi-tool jobsites, breaker and chipping work
• Light to medium sandblasting — single-nozzle abrasive blasting, paint stripping, rust removal
• Cable jetting — fiber-optic and cable blowing operations
• Rental yards — the universal 185 CFM that customers expect

Why the C111 direct-driven airend matters

Most 185 CFM diesel towables on the market use a gear-reduced or belt-driven airend, which means the engine has to overcome the parasitic losses of that drive system before any air gets compressed. Chicago Pneumatic's C111 airend is coupled directly to the engine flywheel — no gearbox, no belts, no idler pulleys. The practical impact: lower fuel consumption per CFM delivered, fewer wear items, and a quieter machine. Over a typical 2,000-hour annual usage cycle, the direct-drive design typically saves operators several hundred gallons of diesel versus belt-driven competitors.

Controller and diagnostics

The CP XC2003 controller is the same panel used on the larger 250 and 400-150 models — a 3.5-inch diagnostic display with operating-hour logging, real-time pressure and temperature readouts, fault history, and automatic shutdown for over-temperature, low oil pressure, and low fuel. Service technicians familiar with any CP towable will be immediately at home on the 185 KDU.

CPS 185 KDU vs. CPS 185-100 KoD — which 185 is right for you?

Chicago Pneumatic offers two 185-class towables and the differences matter:

• CPS 185 KDU — Kubota engine, 49 HP, 25-gallon tank, direct-driven C111 airend, skid-friendly. Best for utility, line-truck, and general contractor crews.
• CPS 185-100 KoD — Kohler KDI 1903 engine, 49 HP, 27-gallon tank, 11.4-hr full-load runtime, trailer-ready with extended autonomy. Best for crews that want the longest possible shift between fill-ups.

Standard configuration

• Single-stage oil-injected rotary screw airend (C111)
• Kubota V2403 Tier 4 Final diesel engine
• CP XC2003 controller with diagnostic display
• 110% spill-free containment frame
• Heavy-duty 2-stage air filtration
• Centrifugal oil separator
• Side-by-side aluminum coolers
• 2 × ¾" NPT service air outlets
• Internal toolbox
• External lifting eye
• DOT towing package available

Ordering, freight, and warranty

Warthog Air Compressor Store is an authorized Chicago Pneumatic dealer. Every CPS 185 KDU ships factory-fresh from a CP distribution center, complete with manufacturer warranty registered in your name. Call (888) 229-9904 for current freight quotes, lead time, and financing options, or add to cart to begin checkout.