Autograde™ TR-3

Trimmer

For single lane applications, the CMI TR-3 and larger TR-4 embody the same legendary design philosophies which made the 'Autograde' the bellwether of fine grade trimmers sought after by road and runway constructors around the world.

The CMI TR-3's center-mounted cutter and its over-cutter center of gravity work together with a rugged V-belt power-band cutter drive system.

This combination of features puts more power to the cut, making the TR-3 one of the industry’s most reliable and productive trimmers.

  • Dual stringline controls allow elevation reference from stringline at either side or both sides of machine.
  • Air receiver and air tools for conical teeth.
  • Discharge conveyor variable-speed control.
  • Wing-type moldboard extension; hydraulic raise, lower.

Features

GREAT WEIGHT DISTRIBUTION

The highly accurate and dependable HYDRA-MATION® controls used on the TR-3 provide unmatched grade accuracy while ensuring long-term reliability. With these outstanding controls, this three-track finegrade trimmer easily prepares grades to within ± 1⁄8-in tolerance at high rates of production. The TR-3’s three-track design manages mainframe and component weight distribution to concentrate the majority of the machine’s mass over the cutter drum. Of course, more weight over the cutter translates to better performance and productivity than is possible with other designs.

3-TRACK DESIGN AND MAINFRAME

Heavy-duty unitized mainframe construction with box-section support beams for strength and rigidity.

Square rear tubular legs and round front tubular leg incorporate hydraulic lift cylinders. Completely raised, the machine has 12 in (305 mm) of cutter clearance above grade.

Tripod leg configuration provides self-stabilizing effect on uneven terrain and keeps the cutter-auger in constant parallel working plane, directly under the machine’s center of mass.

Tracks are yoke-mounted to leg columns, allowing track oscillation over uneven grade.

HYDRA-MATION CONTROL SYSTEM

Patented, fully hydraulic servo-valve sensors for steering and elevation control have 100% proportionality and are adjustable for sensitivity.

One hydro-mechanical sensor for steering, right- or left-hand mounting and operation. Right- or left-hand control AM sensor. Hardware allows right, left or both simultaneously, if option is elected.

OPERATOR’S PLATFORM

Access to platform by right-hand and left-hand ladders at each side. Ladders and platform walkway fold to deck area for transport.

Rear area equipped with lockable steel toolbox, lockable engine-enclosure access doors, lockable fluid-compartment intake caps.

FORWARD AREA—OPERATOR’S STATION

Operator’s lockable console contains machine function controls and engine instrumentation panel. Fingertip control for the conveyor.

Engine-control panel includes system power on/off, ignition/start switch, electronic throttle control and engine-fault warning and diagnostic lights.

Separate access is provided for electrical-system isolation switch, hydraulic-circuit diagnostic gauges and visual indicators for leg elevation position.

STEERING

Hydraulic-powered steering is through the pivoting front track, automatic or manual control.

CROSS-SLOPE CONTROL

The cross-slope pendulum is mechanically connected to its own hydraulic sensor, making automatic corrections to the pre-determined percentage of slope dialed by the operator. Cross-slope control can be selected for right or left stringline reference.

Options

  • 10-ft heavy-duty cutter arrangement featuring 1-in (25-mm) flighting, 94 carbide-tipped conical teeth.
  • 10-ft severe-service cutter arrangement featuring 2-in (50-mm) flighting, 164 carbide-tipped conical teeth
  • Operational-width cutter extensions for 12 ft (3.66 m); 14 ft (4.27 m); 16 ft (4.88 m)
  • Cutter shipping skid for 12-ft–16-ft cutters.
  • One-piece piece cutters.

Specifications

Units

TR-3

operating DIMENSIONS

length

ft / ins

50’ 8.5”

mm

15,450

WIDTH

ft / ins

12’ 7”

mm

3,840

HEIGHT

ft / ins

11’

mm

3,350

weight

lbs

58,000

kgs

26,308

transport DIMENSIONS

length

ft / ins

53’ 3”

mm

16,230

WIDTH

ft / ins

9’ 10”

mm

3,000

HEIGHT

ft / ins

11’

mm

3,350

weight

lbs

43,000

kgs

19,522

ENGINE

MODEL

Caterpillar Diesel

POWER @ 2,200 rpm

hp

335

kW

250

capacity

in³

537

L

8.8

CUTTER ASSEMBLY

trimming WIDTH

ft / ins

10’ to 16’

mm

3,050 to 4,880

optional extension 1 width

ft / ins

up to 12’

mm

up to 3,660

optional extension 2 width

ft / ins

up to 14’

mm

up to 4,270

optional extension 3 width

ft / ins

up to 16’

mm

up to 4,880

trimming DEPTH

ft / ins

up to 8”

mm

up to 203

trimming teeth

176 x tungsten carbide

DRIVE SYSTEMS

operating SPEED RANGE

ft/min

0 - 130

m/min

0 -40

TRAVELLING SPEED RANGE

ft/min

0 -210

m/min

0 -64

CONVEYOR SYSTEM

Collecting conveyor

ft / ins

42”

mm

1,067

discharge conveyor

ft / ins

32’ x 36”

mm

9,750 x 914

Swing

degrees

44°

SERVICE REFILL CAPACITIES

fuel tank

gal

190

L

719.2

HYDRAULIC main reservoir

gal

50

L

189.3

hydraulic prefilter system

gal

7

L

26.5

cooling system

gal

16.6

L

62.5

Find Out More

Click to enquire about our Autograde™ TR-3

Brochures

Please

login
or
register


to download our brochures

Concrete Paving Brochure

Enquire About