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RA-400 - Patchers

About the RA-400

The ultimate output of the RA-400, which is capable of correcting over 200 road defects in a single day by a single individual, has been deployed by contractors looking to maximize productivity while finding a cost-effective patching solution. The driver operated joystick performs a four-step spray injection process typically in less than one minute per repair. Including one of the largest emulsion tanks available in the market, the RA-400 patching boom extends and retracts providing a wide patching range with minimal required maintenance.

Job Application

  • Road repair
  • Pothole patching
  • Shoulder erosion
  • Alligator cracking repair

Key Features

  • One man operation
  • Wide easy loading rock hopper
  • Patch-on-the-go system
  • Computerized material application rate control
Download Product Brochure

Features

Dimensions

  • Length: 28’ (8.5 m) with boom retracted
  • 38’ 5” (11.7 m) with boom fully extended
  • Width: 8’ 6” (2.59 m)
  • Height: 10’ (3 m)
  • Weight: 18,000 lbs (8,164 kg) with standard chassis

Hydraulics

  • Dual hydraulic pump
  • 28 gallons per minute (105.9 l per minute) for blower function
  • 9 gallons per minute (34 l per minute) for all other functions driven from auxiliary engine
  • Hydraulic tank reservoir: 20 gallons (75.7 l)

Chassis

  • Cab-over Peterbilt 220 (or equivalent)
  • GVWR: 33,000 lbs (14,969 kg)
  • Front axle: 12,000 lbs (5,443 kg)
  • Rear axle: 21,000 lbs (9,525 kg), rear springs rated for 23,000 lbs (10,433 kg)
  • Engine: 240 hp (179 kw) @ 2,400 rpm diesel engine
  • Wheelbase: 164” (4.165 m)
  • Cab-to-axle: 153” (3.88 m)
    *Rosco to review truck specifications prior to bid and/or order

Auxiliary Engine

  • Output (gross intermittent): 65 hp (48.4 kw) @ 2,600 rpm
  • Tier 4 Final, naturally aspirated 4 cylinder Kubota diesel engine
  • In-cab aux engine controls at operator’s station with tachometer, hour meter and warning system
  • Engine info:
    - Bore: 3.43 in (87 mm)
    - Stroke: 4.33 in (110 mm)
    - Displacement: 159.5 cubic in (2.615 l)
    - Fuel consumption: 4.54 gallons per hour (17.18 l per hour)@ max torque
    - Alternator: 60 amp

Air System

  • High volume, low pressure. Positive displacement blower driven by truck hydraulics motor
  • Capable of 850 cfm @ 2,850 rpm
  • Hydraulically-driven blower with variable CFM from 0-850

Liquid Asphalt Emulsion Tank

  • Insulated liquid asphalt emulsion tank
  • Overnight heating by two 4,500 watt, 240 volt thermostatically controlled heater elements, located in water heat exchanger tube
  • Alternate heat source provided to maintain heat on work site, regulated automatically to prevent over or under heating of materials
  • Asphalt line heated to prevent clogging during operation
  • Tank mounted 5” (127 mm) dial thermometer and emulsion level indicator both visible from cab
  • Tank size: 300 gallons (1,135.6 l)
  • Tank fill opening: 12” (305 mm)

Aggregate System

  • Low profile, 5 cubic yard (3.82 cubic m) hopper, or 11,000 lbs (4,990 kg)
  • Rectangular welded 10’ 3” x 7’ (3.12 x 2.13 m) aggregate hopper
  • In-cab controlled vibration system
  • Dual electric over hydraulic activated hopper lids, rear access open/close swtich
  • Cab controlled adjustable, feed slide gate meters aggregate flow
  • System will accept aggregates up to .75” (19 mm)
  • Plus+1 system store settings: rock flow, emulsion flow and air flow
  • VORTEC: Vacuum Operated Rock Transfer Emulsion Coating system
    - System utilizes no mechanical or moving parts to move aggregate
    - Ease of access to clean and service the slide gate and sub systems
    - Conveyors and/or paddle feeders are NOT acceptable
    - Venturi nozzle with cleanout

Asphalt Emulsion Feed and Flush System

  • Air pressurized system to deliver sufficient asphalt to completely cover aggregate at full feed capacity
  • Delivery system capable of maintaining 60 psi
  • Flush system 30 gallon (113.5 l) minimum capacity with provisions for storing used flush material
  • Asphalt tank is equipped with a three-way valve for flush, delivery and shut-off

Patch (on the Go)

  • Electric hydraulic flow control for independent operation allows patching while moving at slow speeds

Telescopic Boom

  • Front-corner mount boom storage system
  • Eliminating windshield obstruction in stow position
  • One piece, double acting boom with three-stage telescoping aggregate delivery tube
  • Cable/hose carrier, heated water lines with individual nozzle shut-offs
  • Double acting swing and hoist hydraulic cylinders
  • Position censored safety system that does not allow boom swing into traffic beyond center line
  • Capable swing operations to shoulder and center with caution
  • Reach, retracted: 7’ 5” (2.3 m)
  • Reach, extended: 11’ 5” (3.5 m)
  • Patching area: 42 ft² (12.8 m²)

Optional Equipment

  • Back-up/reverse camera with in-cab color display
  • LED lights in the 30” x 60” (.76 x 1.5 m) arrow board, 13 light
  • Larger arrow board 48” x 96” (1.2 x 2.4 m)
  • LED night working light package, 2 front, 1 rear
  • LED lights, stop, turn signals and tail lights
  • 240V heater conversion in lieu of 120V
  • Emergency triangle kit, flare, fire extinguisher
  • Jet flush system

Training, Support and Company

  • Training and support manuals
  • Optional on-site operator training by Dealer
  • One-year, unlimited hours warranty against any manufacturer defects
  • Extended warranty available
  • 50+ years manufacturing experience
  • ISO 9001 Certified
  • Manufactured in the USA