RG74DXH Operator · Service · Maintenance Manual
800.392.2686
7
Specs
General
Weight: 5920 Lbs Maximum
Length: 190” Maximum
Height: 97” Maximum
Width: 83” Maximum
Chip Collection Capacity: 86cu. ft. (2435 liters) Minimum
Chassis Design: Electrically welded 4”x6”x3/8” (102x152x9.5
mm) wall rectangular steel tubing
Axle Capacity: 7000 lbs (3175 kg)
Telescoping Tongue (coupling) Extension: 60” 152.5 cm)
Minimum
Hitch: Adjustable height 2-5/16” (58.7 mm) Ball
Jack Stand: Hydraulic
Tires: (2) 235-75R-17.5H 6000LB
Engine
Model: Cummins 3.8L, Tier 4/Stage IV, Vertical 4-cycle, Turbo-
charged, Intercooler, Liquid Cooled, diesel
Number of cylinders: 4
Displacement: 229 cu. in
Maximum no load RPM: 2500
Gross HP at maximum no load RPM: 74 HP
Maximum rated torque: 295ft lbs @1300 RPM
Cooling medium: liquid cooled
Air Cleaner: Dry type with Pre-Cleaner
Oil Filter: Spin-on type
Fuel Tank Capacity: 24 gallons
Electrical System: 12 volts/135 AMP Alternator
Safety: Elastometric engine mounts required
Engine: to be operable on (up to) a 30° slope with the cutter
wheel in the full up or down position
Engine: must remain level with machine frame and not tilt
upward or downward while in operation. Also, engine must not
move left or right while in operation.
Hydraulic System - Cutter
Cutter Pump: Variable displacement axial piston
Cutter Motor: Fixed displacement axial piston
Cutter Pump Displacement: Electronic controlled with neutral
start
Command Cut: Swing speed control and horsepower optimizer
Filter: Easy access suction filter and pressure filter
Aux System Pressure Relief: 2250 psi (155 bar)
Lift & swing cylinders: 2 ½” bore x 7-3/8” stroke, 1-1/8” rod
Oil Type: Tellus T46
Hydraulic Tank Capacity: 24 Gallons
Cutting Wheel
Wheel Diameter: 28” Maximum
Wheel Thickness: 1” Minimum
Cutting Wheel Bearings: 2-3/16” diameter double row spherical
roller
Cutter Wheel RPM: 1000 RPM @ 2200 RPM Engine Speed
Drive Belt: MBL GigaTorque®
Cutting Teeth: RAYCO Super tooth™ forged, one piece, with
tungsten carbide tips.
Cutter Teeth Quantity: 40 Maximum
Belt Guard: Steel, one piece
Chip Retaining Curtains: Fabric impregnated rubber
Cutter Wheel: Must come to a stop in less than three seconds
without shutting off engine
Cutter Wheel Engagement: Hydrostatic pump. No clutch
necessary
Cutting Range (without repositioning)
Below Ground Level: 26”
Above Ground Level: 31”
Forward – Backward: 60” (152.4 cm) Minimum
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