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120M Motor Grader
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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.

Specifications

Weights

Operating Weight – Typically Equipped
40565 lb
Gross Vehicle Weight – Maximum – Front Axle
35783 lb
Gross Vehicle Weight – Maximum – Rear Axle
9303 lb
Gross Vehicle Weight – Base – Front Axle
26479 lb
Gross Vehicle Weight – Base – Rear Axle
48601 lb
Gross Vehicle Weight – Maximum – Total
15077 lb
Gross Vehicle Weight – Base – Total
33523 lb
Gross Vehicle Weight – Typically Equipped – Front Axle
40565 lb
Gross Vehicle Weight – Typically Equipped – Rear Axle
11221 lb
Gross Vehicle Weight – Typically Equipped – Total
29343 lb

Blade Range

Circle Centershift – Right
25.8 in
Circle Centershift – Left
25.8 in
Moldboard Sideshift – Right
26.0 in
Moldboard Sideshift – Left
20.1 in
Blade Tip Range – Forward
40°
Blade Tip Range – Backward
Maximum Shoulder Reach Outside of Tires – Right
75.0 in
Maximum Shoulder Reach Outside of Tires – Left
68.6 in
Maximum Lift above Ground
16.8 in
Maximum Depth of Cut
28.3 in

Frame

Drawbar – Width
3.0 in
Circle – Diameter
60.2 in
Drawbar – Height
6.0 in
Front Frame Structure – Height
11.0 in
Front Frame Structure – Width
10.0 in
Front Axle – Wheel Lean, Left/Right
18°
Front Axle – Total Oscillation per Side
32°

Moldboard

Blade Width
12 ft
Moldboard – Height
24.0 in
Arc Radius
16.3 in
Throat Clearance
5.2 in
Moldboard – Width
12 ft

Engine

Base Power (1st gear) – Net
138 hp
Engine Model
Cat C6.6 ACERT™
Bore
4.13 in
Stroke
5.0 in
Speed @ Rated Power
2,000 rpm
Base Power (1st gear) – Net (Metric)
140 hp
Maximum Torque (VHP Plus – Net)
668 lb ft
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 in3
Number of Cylinders
6
Derating Altitude
11500 ft
Standard – Fan Speed – Maximum
1,150 rpm
Standard – Fan Speed – Minimum
600 rpm
Standard – Ambient Capability
U.S. EPA Tier 3/EU Stage IIIA equivalent ° F
High Ambient – Fan Speed – Maximum
1,650 rpm
High Ambient – Fan Speed – Minimum
600 rpm
High Ambient Capability
122 ° F