Caterpillar PS-180

The Caterpillar PS-180 is a static, non-vibratory pneumatic-tired roller in Caterpillar's PS-series compaction line, built in the 1990s and entering the lineup around 1992. It rides on nine smooth rubber tires, sized 7.5x15 10-ply, arranged five in front and four at the rear in a staggered pattern, and it compacts purely through tire-contact ballast weight rather than hydraulic vibration. Power comes from a Perkins 4.236 naturally aspirated diesel, a 3.9 L four-cylinder rated at roughly 57 kW (76.5 hp) gross, driving the wheels through a hydrostatic transmission with no drive chains. Standard operating weight is about 5.0 t (11,010 lb); loading the ballast compartments with water, sand, or steel shot takes the same chassis up to roughly 16.9 t (37,269 lb) at maximum ballast, so one machine covers a wide compaction-force range. Overall length is 4.14 m (13.59 ft), width 1.85 m (6.09 ft), wheelbase 3.36 m (11.01 ft), height to ROPS about 2.64 m (8.67 ft), with an outside turning radius near 5.9 m (19.4 ft) and a top travel speed of about 38.6 km/h (24 mph). The PS-180 is the largest of a three-model family alongside the PS-110 and PS-130, sharing frame architecture and factory service literature under Caterpillar's 7MD/7ND/7PD serial-prefix scheme. The line traces back to Raygo, a Minnesota compaction-equipment builder Caterpillar acquired in the late 1980s; the retained Raygo product lines were repainted Cat yellow and relabeled with Cat model numbers, which is the likely origin of the PS-series.

Within the PS-180's own run, documented spec changes are minor: this is a mechanically simple, pre-electronic machine with analog gauges, a thermostart cold-start aid, and a mechanical rotary fuel-injection pump instead of any ECM or onboard diagnostics. The larger shift in Caterpillar's pneumatic-roller lineup happened after the PS-180 left production, when Caterpillar introduced the PS-150B and PS-200B on the unrelated Cat 3054 engine family; no factory literature ties that later generation to the PS-180 as a direct replacement, so treat it as a separate design rather than a successor. Caterpillar's pneumatic-roller range later moved toward vibratory and combination smooth-drum/pneumatic machines, and pure static pneumatic rollers like the PS-180 became a smaller niche. Today the PS-180 lives mainly in the used and parts market: its appeal is mechanical simplicity, a widely serviced Perkins block, and no electronics to fail, while its challenge is scarcity of factory-specific wear parts. Tires, ballast tank hardware, articulation bushings, and hydrostatic drive components typically have to be cross-referenced or sourced through the same parts channel that also covers the PS-110 and PS-130.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.