US
Metric

Overview

The Cat® 120M Motor Grader is designed to help you get more work done in less time. Unprecedented operator comfort and ease of service help to maximize your return on investment.

Engine

Base Power (1st Gear) - Net
138.00 mm H2O
103.00 kg/mm
Engine Model
Cat C6.6 ACERT™
Bore
4.13 in
105.00 mm
Stroke
5.00 in
127.00 mm
Speed at Rated Power
2,000 rpm
Base Power (1st Gear) - Net - Metric
140.00 mm H2O
103.00 kg/mm
Maximum Torque - VHP Plus - Net
668.00 lb/ft
906.00 N·m
Torque Rise - VHP Plus
40%
VHP Plus Range – Net
103-136 kW (138-182 hp)
VHP Plus Range – Net (Metric)
103-136 kW (140-185 hp)
Displacement
403.00 in3
6.60 L
Number of Cylinders
6
Derating Altitude
11500.00 ft
3505.00 m
Standard Fan Speed – Maximum
1,150 rpm
Standard Fan Speed – Minimum
600 rpm
Emissions
U.S. EPA Tier 3/EU Stage IIIA equivalent
Standard - Fan Speed - Maximum
1,150 rpm
Standard - Fan Speed - Minimum
600 rpm
High Ambient Capability
122.00 ° F
50.00 ° C

Weights

Operating Weight - Typically Equipped
40565.00 lb
18400.00 null
Gross Vehicle Weight – Base: Total
35783.00 lb
16231.00 kg
Gross Vehicle Weight – Base: Front Axle
9303.00 lb
4220.00 kg
Gross Vehicle Weight – Base: Rear Axle
26479.00 lb
12011.00 kg
Gross Vehicle Weight – Maximum: Total
48601.00 lb
22045.00 kg
Gross Vehicle Weight – Maximum: Front Axle
15077.00 lb
6839.00 kg
Gross Vehicle Weight – Maximum: Rear Axle
33523.00 lb
15206.00 kg
Gross Vehicle Weight – Typically Equipped: Total
40565.00 lb
18400.00 kg
Gross Vehicle Weight – Typically Equipped: Front Axle
11221.00 lb
5090.00 kg
Gross Vehicle Weight – Typically Equipped: Rear Axle
29343.00 lb
13310.00 kg

Moldboard

Blade Width
12.00 ft
3.70 m
Moldboard – Height
24.00 in
610.00 mm
Arc Radius
16.30 in
413.00 mm
Throat Clearance
5.20 in
134.00 mm
Moldboard – Width
12.00 ft
3.70 m

Frame

Drawbar - Width
3.00 in
76.20 mm
Circle - Diameter
60.20 in
1530.00 mm
Drawbar - Height
6.00 in
152.00 mm
Front Frame Structure - Height
11.00 in
280.00 mm
Front Frame Structure - Width
10.00 in
255.00 mm
Front Axle – Wheel Lean, Left/Right
18°
Front Axle - Total Oscillation per Side
32°

Blade Range

Circle Centershift - Right
25.80 in
656.00 mm
Circle Centershift - Left
25.80 in
656.00 mm
Moldboard Sideshift - Right
26.00 in
660.00 mm
Moldboard Sideshift - Left
20.10 in
510.00 mm
Blade Tip Range - Forward
40°
Blade Tip Range - Backward
Maximum Shoulder Reach Outside of Tires - Right
75.00 in
1905.00 mm
Maximum Shoulder Reach Outside of Tires - Left
68.60 in
1742.00 mm
Maximum Lift Above Ground
16.80 in
427.00 mm
Maximum Depth of Cut
28.30 in
720.00 mm

Engine

Note
Maximum torque (VHP Plus) measured at 1,400 rpm.
Note
Net power is tested per ISO 9249, SAE J1349, and EEC 80/1269 Standards in effect at the time of manufacture.
Note
Net power advertised is the power available at rated speed of 2,000 rpm, measured at the flywheel when engine is equipped with fan running at minimum speed, air cleaner, muffler and alternator.
Note
Power as declared per ISO 14396: Rated Speed = 2,000 rpm; VHP Plus = 175 kW (234 hp)
Note
No engine derating required up to 3048 m (10,000 ft).
Engine Model
Cat C6.6 ACERT™
Bore
4.13 in
105.00 mm
Stroke
5.00 in
127.00 mm
Emissions
U.S. EPA Tier 3/EU Stage IIIA equivalent
High Ambient - Fan Speed - Maximum
1,650 rpm
High Ambient - Fan Speed - Minimum
600 rpm
VHP Plus Range - Net
103-136 kW (138-182 hp)
VHP Plus Range - Net - Metric
103-136 kW (140-185 hp)
Displacement
403.00 in³
6.60 l
Number of Cylinders
6
Derating Altitude
11500.00 ft
3505.00 m
High - Ambient Capability
122.00 °F
50.00 °C

Frame

Front Axle - Wheel Lean - Left/Right
18°

Moldboard

Moldboard - Height
24.00 in
610.00 mm
Moldboard - Width
12.00 ft
3.70 m

Weights

Gross Vehicle Weight - Base - Front Axle
9303.00 lb
4220.00 null
Gross Vehicle Weight - Base - Rear Axle
26479.00 lb
12011.00 null
Gross Vehicle Weight - Base - Total
35783.00 lb
16231.00 null
Gross Vehicle Weight - Maximum - Front Axle
15077.00 lb
6839.00 null
Gross Vehicle Weight - Maximum - Rear Axle
33523.00 lb
15206.00 null
Gross Vehicle Weight - Maximum - Total
48601.00 lb
22045.00 null
Gross Vehicle Weight - Typically Equipped - Front Axle
11221.00 lb
5090.00 null
Gross Vehicle Weight - Typically Equipped - Rear Axle
29343.00 lb
13310.00 null
Gross Vehicle Weight - Typically Equipped - Total
40565.00 lb
18400.00 null

Engine

Note (1)
Maximum torque (VHP Plus) measured at 1,400 rpm.
Note (2)
Net power is tested per ISO 9249, SAE J1349, and EEC 80/1269 Standards in effect at the time of manufacture.
Note (3)
Net power advertised is the power available at rated speed of 2,000 rpm, measured at the flywheel when engine is equipped with fan running at minimum speed, air cleaner, muffler and alternator.
Note (4)
Power as declared per ISO 14396: Rated Speed = 2,000 rpm; VHP Plus = 175 kW (234 hp)
Note (5)
No engine derating required up to 3048 m (10,000 ft).
Features

Performance

  • Programmable Autoshift option simplifies operation by allowing transmission to be programmed to shift at optimal points to match application.
  • Power Shift Countershaft Transmission matches to engine, maximizing power to the ground.
  • Electronic Throttle Control helps improve productivity by providing best match of horsepower and torque for application demands.

Efficiency

  • Aggressive blade angle, optimized moldboard curvature and large throat clearance allow material to roll more freely along blade, increasing efficiency.
  • Hydraulic demand fan automatically adjusts speed according to cooling requirements resulting in more power to the ground and improved fuel efficiency.
  • Engine idle shutdown is available to shut down engine after a set period of time saving fuel and helping reduce emissions.

Ease of Operation

  • Selectable blade lift modes – Fine, Normal, or Coarse – allow you to choose the blade lift modulation mode that best fits your application or operating style.
  • Joystick controls with electronically adjustable control pods reduce hand and arm movement by 78%, helping reduce operator fatigue.
  • Left joystick controls steering, articulation, return-to-center, wheel lean, gear selection, left moldboard lift cylinder and float.
  • Right joystick controls drawbar, circle and moldboard functions as well as electronic throttle control and manual differential lock/unlock.
  • Articulation Return-to-Center automatically returns machine to a straight frame position from any angle with the touch of a button.

Safety

  • Angled cab doors, tapered engine enclosure and sloped rear window increase visibility.
  • Optional rear vision camera enhances sight to rear of machine.

Serviceability

  • Convenient access from the top of the circle to the patented top-adjust wear strips and inserts make them easy to add or replace.
  • Shimless Moldboard Retention System uses vertical and horizontal adjusting screws to keep moldboard wear strips aligned for reduced blade chatter and precise blade control.

Comfort

  • Control pods can be adjusted electronically, making it easy to set to ideal operating position.
  • Standard Cat Comfort Series suspension seat is fully adjustable.
  • High capacity Heating, Ventilation, and Air Conditioning (HVAC) system dehumidifies and pressurizes cab, sealing out dust, and helps keep windows clear.

Technology

  • Shuttle Shift allows smooth, fast direction shifts without requiring you to manipulate the throttle or inching pedal.
  • Cat Product Link™ aids your equipment management with remote monitoring capabilities.
  • Optional Stable Blade improves grading precision by decreasing engine speed at 15 percent intervals when machine bounce is detected then increases engine rpm systematically when grader stabilizes.
  • Optional Auto Articulation allows you to articulate automatically while steering in tight spaces or around curves, obstacles, and turnarounds.
  • Optional Cat GRADE with Cross Slope helps maintain desired cross slope by automatically controlling one side of the blade.
  • Optional Cat AccuGrade™ uses positioning and guidance technologies, machine sensors, and automatic blade control to help get to grade faster, easier and more efficiently.
  • Optional Cat Advanced Control Joysticks allow you to control automated grading solutions efficiently and safely without removing your hands from the joysticks.