Products > Astec > Trenchers & Plows > Astec RT660

Astec RT660 Specifications

RT660

ENGINE

  • Model ................................. 4.390 Cummins
  • Type..... 4-stroke, naturally aspirated
  • Cylinders............................................ 4
  • Bore/Stroke ................... 4.02” x 4.72”  (102 x 120 mm)
  • Displacement ............... 239 in3 (3.9 L)
  • Fuel injection............................. Direct
  • Fuel............................................. Diesel
  • Fuel filter ............... Spin-on cartridge
  • Air intake .......................... Cross-flow
  • Cooling ..................................... Liquid
  • Horsepower
  • Gross......... 67 (50 kW) @ 2200 rpm
  • Net ............ 63 (47 kW) @ 2200 rpm
  • Maximum torque
  • Gross................. 188 lb·ft (255 N·m) @ 1200 rpm
  • Net .................... 185 lb·ft (251 N·m) @ 1200 rpm

ENGINE COOLING

  • Radiator
  • Core type ................... Square wave
  • Core size area....... 397 in2 (0.39 m2)
  • Rows of tubes ................................ 4
  • Fan w/standard transmission
  • Style ........................ 7 blade suction
  • Diameter ................ 17.8” (452 mm)
  • Ratio .......................................... 1.1:1
  • Water pump
  • Style ..................................... Integral
  • Engine oil
  • Pump...... Deep sump, plate cooler with pressurized nozzles under-piston
  • Pump operating angle ratings
  • Side-to-side.................. Rated 45°
  • Fore and aft ................. Rated 45°
  • Oil filtration....................... Spin-on, full-flow cartridge

POWERTRAIN

  • Transmission......... Hydrostatic 4WD with 4-wheel steering. Limited-slip differential and outboard planetaries on both front and rear axles. Modular powertrain components.
  • Drive .................................Hydrostatic variable displacement axial-piston pump 0 – 36 gpm (0-137 L/min)
  • U-joints .................. Constant velocity
  • Axle ratio.................................... 11.6:1
  • Planetaries ................. 6:1 – Outboard
  • Differentials.................... Limited slip
  • Steering .................. 2W, 4W and crab
  • Axle oscillation .............................. 20°
  • Service brakes................. Hydrostatic
  • Parking brake........ Foot applied disc
  • Travel speeds (m.p.h.)
  • Tires 1st 2nd 3rd 4th
  • 31 x 15.5-15 ....1.4 .....1.9 .....5.1 .....7.4
  • 35 x 19-16.1 ....1.4 .....1.9 .....5.1 .....7.4

NOTE: Rated speeds in forward and reverse.

 

 

TIRES

  • 31 x 15.5 - 15, 8 PR
  • 35 x 19 - 16.1, 12 PR (heavy-duty)

 

SERVICE CAPACITIES

  • Fuel tank...................... 17 gal (64.4 L)
  • Cooling system................ 18 qt (17 L)
  • Engine with oil filter.... 11.6 qt (11 L)
  • Pump drive...................1.4 pt (0.65 L)
  • Hydraulic reservoir ...... 14 gal (53 L)
  • Total hydraulic ........... 20 gal (75.8 L)
  • Transmission.................. 1.8 qt (1.7 L)
  • Axle center (each) ............ 4 qt (3.8 L)
  • Planetaries (each) ........ 0.65 qt (0.6 L)
  • Trencher planetary drive .............. 1.5 qt (1.4 L)
  • Hydra-Borer System ....... 1.0 qt (0.9 L)

HYDRAULICS

  • Attachment drive pump......... 36 gpm (137 L/min)
  • Steering pump .... 8.6 gpm (32 L/min)
  • Accessory pump .......................8.6 gpm (32 L/min)
  • Filtration:
  • Full-flow spin-on cartridges
  • Accessory return..................2 micron
  • Charge pump flow (2)........2 micron

NOTE: Pump capacity rated @ 2200 engine rpm.

ELECTRICAL SYSTEM

  • Voltage..... 12 volts, negative ground
  • Alternator................................ 65 amp
  • Starter ..................... 2.5 kW (3.35 HP)
  • Battery ........ 685 cold-cranking amps

 

OPERATOR ENVIRONMENT

  • ROPS
  • Left and right entry/exit
  • Unobstructed operator platform
  • Swivel seat w/seat belt
  • Key start
  • Hand and foot travel controls
  • Adjustable and rotating seat position

  

INSTRUMENTATION

  • Engine coolant temperature gauge
  • Hydraulic oil temperature gauge
  • Fuel level indicator
  • Voltage meter
  • Engine oil pressure indicator
  • Tachometer/hourmeter
  • Hydraulic charge filter indicator
  • Hydraulic filter indicator
  • Air filter restriction indicator
  • Neutral indicator
  • Alternator light
  • Park brake light

 

NOTE: All specifications are stated in accordance with SAE Standards or Recommended Practices, where applicable.

IMPORTANT: Astec Underground reserves the right to change these specifications without notice and without incurring any obligation relating to such change. Astec Underground does not warrant the safety or reliability of attachments from other manufacturers.

Please contact Astec Underground at
9600 Corporate Park Drive | Loudon, TN 37774-5584
Phone (865) 408-2100 | Toll Free (800) 527-6020 | Fax (865) 458-8575

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