2025 PETERBILT 548

2025

1 mi

New

SM 761652

This Peterbilt Model 548 Medium Duty is built for construction dump work, powered by a 330 HP PACCAR PX-9 engine paired with an Allison 3000 RDS-P 6-speed automatic transmission. It rides on a 20,000 lb PACCAR FX-20 front axle and a 26,000 lb Dana Spicer rear axle for a 46,000 lb GVWR, with a single-drive differential lock and high-entry rear axle configuration for added traction off-highway. Coverage includes PACCAR's 2-year/250,000-mile standard engine warranty and a 5-year/100,000-mile EPA emissions warranty. Contact us to learn more about this unit. Overview This Peterbilt Model 548 Medium Duty is configured as a construction dump truck, built for on/off-highway hauling of construction materials with a 144" long, 120" high end dump body. Engine & Drivetrain Powered by a PACCAR PX-9 engine rated 330 HP (governed 2,200 RPM) with 1,000 lb-ft of torque at 1,200 RPM, built to 2024 emissions standards with EMUX electronics architecture. Paired with an Allison 3000 RDS-P Rugged Duty Series automatic transmission, Gen 6, in a 6-speed close-ratio configuration with a TC-421 torque converter, dash-mounted push-button shifter, and neutral-at-stop enabled. Driveline is a 1710 HD unit with one midship bearing. PTO provisions include a Chelsea PTO with a dash-mounted, single-acting electric-over-hydraulic control and LH-mounted trans PTO provisions, plus an automatic transmission oil cooler. Typical operating speed is set at 65 MPH, with the powertrain optimized for vocational/heavy-GCWR performance. Additional engine equipment includes a PACCAR 160-amp brushed alternator, PACCAR 12V starter, four PACCAR premium 12V dual-purpose batteries (2,920 CCA) with a low-voltage disconnect system, variable-speed belt-driven fan clutch, 18.7 CFM air compressor, VGT exhaust brake, high-efficiency cooling system, single engine-mounted air cleaner, and a single right-hand side-of-cab exhaust with under-cab DPF/SCR (single module), curved-tip standpipe, and an 18" chrome standpipe with clear coat. A 110–120V immersion-type block heater and 12V-heated fuel filter are also equipped. Chassis & Axles Front axle is a PACCAR FX-20 rated 20,000 lbs with a 4" drop, wide-track configuration, and gusseted cam brackets, riding on taper leaf springs with shocks; steering is a Sheppard HD94 dual-gear power steering system with a frame-mounted reservoir and cooler. Rear axle is a Dana Spicer S26-190 rated 26,000 lbs with a 6.14 ratio, wide-track single and tandem drive configuration, gusseted cam brackets, high-entry setup, and a single-drive differential lock with speed interlock. GAWR is 20,000 lbs front / 26,000 lbs rear, with a 46,000 lb GVWR and 46,000 lb GCW. Wheelbase measures 166", with FAX/BOC at 69.5", cab/axle at 96.5", and cab/EOF at 159.3"; maximum grade rating is 6%. The frame consists of 10-3/4" steel rails (3/8" thickness) to 354", zinc-coated for anti-corrosion protection, with aluminum frame rail crossmembers, an HD 5-piece crossmember at BOC, 3-piece suspension crossmembers, a 24" bumper extension, and a square end-of-frame configured for a body-builder-installed crossmember. Braking includes Bendix air cam drum brakes (16.5x6 front, 16.5x7 rear) with heavy-duty drums and cam bushings on the drive axles, reinforced rear brake camshafts, upsized parking brakes, an SBM valve, and a 4S4M anti-lock braking system; all axles use synthetic lubricant. A 60-gallon D-shaped aluminum fuel tank is mounted left-hand under cab with a non-slip step and polished stainless steel straps, alongside a small (14-gallon) DEF tank with a polished stainless steel cover and a DEF-to-fuel ratio between 1:1 and 2:1. Air system equipment includes a Bendix AD-HF EP air dryer with heater, coalescing filter and extended purge, aluminum painted air tanks with pull cords, nylon chassis hose, a self-returning dash-mounted brake hand valve, and a 7-way AE electrical connection at the end of frame. An aluminum space-saver battery box is mounted right-hand BOC with side access, and the front bumper is a painted steel tapered unit with two tow points finished to match the frame. Suspension Front suspension uses taper leaf springs with shocks rated 20,000 lbs. Rear suspension is a Reyco 79KB multi-leaf setup rated 26,000 lbs, fitted with Reyco helper springs rated 4,500 lbs. Cab & Interior The cab is built on a 109" FEPTO hood with a stationary grille and 3-piece Metton construction, a bright-finish hood crown, and 4" extra-wide fender lips, in a day cab configuration with a 3-piece fixed glass rear window and one-piece curved windshield. Interior is finished in ProBilt charcoal gray with a curved roof, featuring black cloth Sears driver and passenger seats — the driver's seat is air-ride and high-back, the passenger seat is non-air-ride and high-back — along with a right-hand driver's armrest, high-visibility yellow-painted grab handles, metal door panel kick plates, an adjustable tilt/telescoping steering column, and a Peterbilt logo steering wheel. Comfort and convenience features include a combo fresh-air heater/air conditioner, thermal insulation package, cab air suspension, auto-reset circuit protection, power door locks and window lifts, electric windshield wipers with intermittent feature, and a rear wall deep record/map pocket. Audio and connectivity include a ConcertClass AM/FM radio with weatherband and 3.5mm aux input, a standard 2-speaker package, Bluetooth phone/audio, a USB port, and global telematics hardware (installed with SmartLinq disabled per Massachusetts Right to Repair law). Exterior visibility equipment includes motorized, heated Peterbilt aero mirrors with integrated convex lenses, a black-housed look-down mirror over the passenger door, an outside stainless steel sunvisor, composite fender-mounted headlights with integral DRL/park/turn/side marker lighting, five chrome-housed aero LED marker lights, bumper-mounted daytime running lights, wiring for a beacon/strobe at the rear sill, and incandescent square stop/turn/tail/backup lights. Safety equipment includes a digital 7" instrument cluster (displaying transmission oil temperature and an air restriction indicator), a dual-scale MPH/KPH speedometer, an inboard-mounted fire extinguisher, a ship-loose triangle reflector kit, and a 107 dB backup alarm. An exterior cab entry grab handle and a non-slip aluminum cab entry step (aftertreatment side) are also fitted. Body & Equipment Configured for a 144" long, 120" high end dump body with a 1,000 lb max laden weight rating, intended for construction materials hauling in on/off-highway dump service. Tires & Wheels Front tires are 315/80R22.5 G289, 20-ply, mounted on Alcoa 22.5x9.00 high-polish aluminum wheels. Rear tires (qty 4) are 12R22.5 XDN2, 16-ply, mounted on Alcoa 22.5x8.25 high-polish aluminum wheels (qty 4). Warranty & Protection Backed by PACCAR PX-9 standard engine coverage of 2 years/250,000 miles (402,336 km)/6,250 hours, Peterbilt Severe Service coverage of 1 year/50,000 miles (80,000 km), and an EPA emissions base warranty of 5 years/100,000 miles.

330 HP

PACCAR

PX9

ALLISON

Allison RDS

6.14

Reyco

20,000 lb

26,000 lb

315/80R22.5 | 12R22.5

166 in

Left Hand Drive

WHITE