120H Motor Grader

Engine

Base Power (1st gear) – Net	93.0 kW
Engine Model	Cat® 3126B DITA ATAAC VHP
VHP - gears 4-8 Net	104.0 kW
Base Power (all gears) Gross	104.0 kW
VHP - gears 1-3 Gross	104.0 kW
VHP - gears 4-8 Gross	115.0 kW
Bore	110.0 mm
Stroke	127.0 mm
Speed @ Rated Power	2000 RPM
Base Power (all gears) – Net	93.0 kW
Maximum Torque	737.0 N·m
Torque Rise	50%
Displacement	7.2 L
VHP - gears 1-3 Net	93.0 kW
Number of Cylinders	6
Derating Altitude	3048.0 m
Standard – Fan Speed – Maximum	1210 RPM
Standard – Fan Speed – Minimum	500 RPM
Standard – Ambient Capability	47.0 ° C
High Ambient – Fan Speed – Maximum	1300 RPM
High Ambient – Fan Speed – Minimum	500 RPM
High Ambient Capability	50.0 ° C

Weights

Gross Vehicle Weight – Maximum – Front Axle	5076.0 kg
Gross Vehicle Weight – Maximum – Rear Axle	11846.0 kg
Gross Vehicle Weight – Base – Front Axle	3611.0 kg
Gross Vehicle Weight – Base – Rear Axle	9039.0 kg
Gross Vehicle Weight – Maximum – Total	16922.0 kg
Gross Vehicle Weight – Base – Total	12650.0 kg

Moldboard

Blade Width	3.658 m
Moldboard – Height	610.0 mm
Moldboard – Thickness	22.0 mm
Arc Radius	413.0 mm
Throat Clearance	120.0 mm
Cutting Edge – Width	152.0 mm
Cutting Edge – Thickness	16.0 mm
End Bit – Width	152.0 mm
End Bit – Thickness	16.0 mm
Blade Pull – Base GVW	8081.0 kg
Blade Pull – Maximum GVW	10661.0 kg
Blade Down Pressure – Base GVW	6574.0 kg
Blade Down Pressure – Maximum GVW	9100.0 kg

Dimensions

Height – Top of Cab	3108.0 mm
Height - high profile cab	3332.0 mm
Height - no cab	3090.0 mm
Length – Counterweight to Ripper	10064.0 mm
Width – Outside Front Tires	2441.0 mm
Length – Front Axle to Mid Tandem	5923.0 mm
Length – Front Tire to Rear of Machine	8314.0 mm
Length – Front Axle to Moldboard	2596.0 mm
Length – Between Tandem Axles	1510.0 mm
Width – Outside Rear Tires	2402.0 mm
Width – Tire Center Lines	2056.0 mm
Height – Front Axle Center	594.0 mm
Height to Exhaust Stack	3138.0 mm
Height to Top of Cylinders	2912.0 mm
Ground Clearance at Rear Axle	351.0 mm

Operating Specifications

Top Speed – Forward	42.6 km/h
Top Speed – Reverse	33.7 km/h
Turning Radius, Outside Front Tires	7.3 m
Steering Range – Left/Right	50°
Articulation Angle – Left/Right	20°
Forward – 1st	3.6 km/h
Forward – 2nd	5.0 km/h
Forward – 3rd	7.2 km/h
Forward – 4th	9.9 km/h
Forward – 5th	15.7 km/h
Forward – 6th	21.3 km/h
Forward – 7th	29.3 km/h
Forward – 8th	42.6 km/h
Reverse – 1st	2.9 km/h
Reverse – 2nd	5.4 km/h
Reverse – 3rd	7.8 km/h
Reverse – 4th	12.4 km/h
Reverse – 5th	23.1 km/h
Reverse – 6th	33.7 km/h

Service Refill

Fuel Capacity	340.0 L
Cooling System	40.0 L
Hydraulic System – Total	68.0 L
Hydraulic System – Tank	38.0 L
Engine Oil	29.5 L
Transmission/Differential/Final Drives	47.0 L
Tandem Housing (each)	49.0 L
Front Wheel Spindle Bearing Housing	0.5 L
Circle Drive Housing	7.0 L

Power Train

Forward/Reverse Gears	8 fwd / 6 rev
Transmission	direct drive, power shift
Brakes – Service	air actuated, multiple oil disc
Brakes – Service, Surface Area	16744.0 cm2
Brakes – Parking	air-actuated, multiple oil-disc
Brakes – Secondary	dual circuit

Hydraulic System

Circuit Type	closed center load sense
Pump Type	variable piston
Pump Output	144.0 L/min
Maximum System Pressure	24150.0 kPa
Reservoir Tank Capacity	38.0 L
Standby Pressure	3100.0 kPa

Frame

Circle – Diameter	1530.0 mm
Circle – Blade Beam Thickness	30.0 mm
Drawbar – Height	127.0 mm
Front-Top/Bottom Plate – Width	280.0 mm
Front-Top/Bottom Plate – Thickness	22.0 mm
Front-Side Plates – Width	236.0 mm
Front-Side Plates – Thickness	10.0 mm
Front-linear weights - min	134.0 kg/m
Front-linear weights - max	172.0 kg/m
Front-section modulus - min	1619.0 cm3
Front-section modulus - max	3681.0 cm3
Front Axle – Height to Center	608.0 mm
Front Axle – Wheel Lean, Left/Right	18°
Front Axle – Total Oscillation per Side	32°

Blade Range

Circle Centershift – Right	628.0 mm
Circle Centershift – Left	625.0 mm
Moldboard Sideshift – Right	660.0 mm
Moldboard Sideshift – Left	524.0 mm
Maximum Blade Position Angle	90°
Blade Tip Range – Forward	40°
Blade Tip Range – Backward	5°
Maximum Shoulder Reach Outside of Tires – Right	1912.0 mm
Maximum Shoulder Reach Outside of Tires – Left	1840.0 mm
Maximum Lift above Ground	457.0 mm
Maximum Depth of Cut	775.0 mm

Scarifier

Front, V-Type – Scarifier shank holder spacing	116.0 mm
Front, V-Type – Scarifier shank holders	11
Front, V-Type – Scarifying depth, maximum	292.0 mm
Front, V-Type: Working Width	1184.0 mm
Front, straight: Working width	1800.0 mm
Front, straight: Scarfying depth, maximum	317.0 mm
Front, straight: Scarifier shank holders	17
Front, straight: Scarifier shank holder spacing	111.0 mm

Ripper

Ripping Depth – Maximum	262.0 mm
Ripper Shank Holders	5
Shank Holder Spacing – Minimum	533.0 mm
Penetration Force	4343.0 kg
Pryout Force	2279.0 kg
Machine Length Increase, Beam Raised	1058.0 mm

Tandems

Height	438.0 mm
Width	172.0 mm
Sidewall Thickness – Inner	14.0 mm
Sidewall Thickness – Outer	16.0 mm
Drive Chain Pitch	44.5 mm
Wheel Axle Spacing	1510.0 mm
Tandem Oscillation – Front Up	15°
Tandem Oscillation – Front Down	25°

Engine

Caterpillar engines deliver increased performance and lower operating costs.

3126B DITA ATAAC Engine

The innovative Cat 3126B diesel engine delivers large-engine performance from a compact engine design. The six-cylinder engine is turbocharged and air-to-air aftercooled. With high displacement and low rated speed, this engine provides excellent fuel economy and durability that can significantly reduce operating costs.

Power Train

Matched Caterpillar components deliver smooth, responsive performance and reliability.

Power Shift Transmission

Designed and built specifically for Cat motor graders, the rugged transmission provides on-the-go, full-power shifting as well as inching capability.

Brakes

Caterpillar multi-disc brakes offer a large surface area for dependable, extended-life braking. The air-actuated service brakes, located in each of the four wheel spindle housings, are sealed, adjustment free, and lubricated and cooled by tandem housing oil. The parking/emergency brakes, located in the transmission on the output shaft, are spring actuated and air pressure released. When engaged, they neutralize the transmission and lock the wheels on any surface.

Hydraulics

Balanced hydraulics deliver consistent, precise and responsive control.

Load Sensing Hydraulics

A load sensing variable displacement pump and the advanced proportional priority pressure-compensating (PPPC, or "triple-PC") hydraulic valves provide superior implement control and enhanced machine performance and efficiency. Continuously matching hydraulic flow and pressure to power demands creates less heat and reduces power consumption.

Implement Control Valves

PPPC valves have different flow rates for the head and rod ends of the cylinder. This insures consistent extension and retraction properties for each cylinder, and improves operator 'feel' and system response. All control valves use lock valves to maintain blade settings. Line relief valves protect cylinders from excessive pressure.

Balanced Flow

Hydraulic flow is proportioned to ensure all implements operate simultaneously. If demand exceeds pump capacity, all cylinders are reduced by the same ratio. The result is improved productivity in virtually any application.

Blade Float

Blade float, incorporated into the blade lift control valves, allows the blade to move freely under its own weight. By floating both cylinders, the blade can follow the contours of the road when removing snow. Floating only one cylinder permits the toe of the blade to follow a hard surface while the operator controls the slope with the other lift cylinder.

Independent Oil Supply

Large separate hydraulic oil supply prevents cross-contamination and provides proper oil cooling, which reduces heat build-up and extends component life.

Heavy Duty XT™ Hose

Caterpillar hose technology allows high pressures for maximum power and reduced downtime, and intelligent routing minimizes exposure to damage.

Optional Hydraulic Lockout

Mechanically locks all moldboard, machine, and attachment control levers during machine roading. This prevents implements from being accidentally engaged when the motor grader is travelling down the road.

Drawbar, Circle, Moldboard

Every component is designed for maximum productivity and durability.

Blade

Heat treated moldboard rails, through-hardened, curved DH-2™ steel cutting edge and end bits, and replaceable metallic wear inserts assure a long, reliable service life. Three sideshift mounting locations for the optional moldboard add flexibility.

Blade Positioning

The blade linkage design provides extensive moldboard positioning, most beneficial in mid-range bank sloping and in ditch cutting and cleaning.

Circle Construction

One-piece forged circle with hydraulically driven motor stands up to high stress loads. Raised wear surfaces prevent circle teeth wear against the drawbar. Sixty-four uniformly spaced teeth on the front 240° of the circle are flame cut and heat induction hardened to resist wear. And the circle, with 360° rotation, is secured to the drawbar by four vertically and horizontally adjustable shoes for maximum support.

Drawbar Construction

The Y-frame drawbar is constructed of two solid beams for high strength and optimum durability, as well as precise blading control.

Blade Lift Accumulators

These optional blade lift accumulators absorb vertical shocks encountered when the moldboard contacts immovable objects. This option is especially useful in rough grading and rocky areas.

Structures

The 120H frame is designed and built to exceed the expectations of the customer.

Integrated Bumper

The integrated bumper ties the rear frame together into a cohesive unit, to handle the loads possible with the new 3126B power train. This is especially important in ripping and snow removal applications where graders are equipped with snow wing attachments.

Rear Frame

Rear frame has two box-sectioned channels integral with fully welded differential case for a solid working platform.

Front Frame

Continuous top and bottom plate construction provides consistency and strength. The flanged box section design removes welds from high stress areas, improving reliability and durability, and increasing resale values for the customer.

Operator's Station

The 120H includes innovative changes to improve operator efficiency and, in turn, greater machine productivity.

Comfort and Convenience

Comfort and convenience are designed into every feature of the operator's station.

Exceptional Visibility

The narrow operator's console provides good forward visibility. Large side windows allow a clear view of the moldboard heel and tandem tires. A wide rear window and tapered engine hood provide a good view to the rear of the machine. The position of the air dryer and air cleaner, and the alignment the precleaner and muffler, provides good visibility to the rear of the machine. Operators can work more confidently and efficiently.

Serviceability

Re-engineered inspection and service points save time and expense.

Service Center

Gathering many of the frequently serviced items into a ‘Service Center’ on the left side greatly improves access, and helps ensure proper maintenance and inspection routines, The result is better machine availability and lower operating costs.

• Large hinged doors provide easy access to the adjacent engine and maintenance service compartments.
• Engine and hydraulic oil checkpoints, coolant gauges, and air filters
• Spin-on filters for oils, fuel, coolant
• Remote lubrication points, purge valves and ecology drain lines
• Fuse panel with new automotive style fuses located inside cab
• Sample ports for engine, hydraulic, transmission fluids, coolant and fuel, encourages preventive maintenance and diagnostics like the S•O•SSM analysis program.

Fuel Tank

A 340 L (90 gal) ground level fuel tank allows longer work shifts and reduces refueling times. A fuel tank sediment drain enables the operator to remove sediment accumulation, reducing the risk of fuel system damage.

Extended Fluid Change Interval

Operate a full 500 hours between engine oil and filter changes, 4,000 hours between hydraulic oil changes, and 12,000 hours between engine coolant changes. This reduces downtime and operating expense.

Cat XT Hose

Caterpillar XT hose technology allows high pressures for maximum power and reduced downtime, and intelligent routing minimizes exposure to damage.

O-Ring Face Seals

Cat O-ring face seals assure rock-solid connections that maintain pressure and reduce oil leaks. Intelligent hose routing minimizes exposure to damage, increasing hose life and enhancing reliability.

Radiator Cleanout Access

Radiator clean-out access gives the operator the ability to clear away debris and other materials that build up around the radiator. This ensures that the radiator functions properly keeping the engine cool and increasing component life.

Environmentally Responsible Design

Caterpillar builds machines that help you create a better world.

Quiet Cab

The resiliently mounted engine and transmission provide interior sound levels of 76dB(A) when measured with the doors and windows closed per ISO 6394. Lower interior noise levels improve operator working conditions.

Quiet Machine

Exterior sound level of 107dB(A) when tested per ISO 6395, Annex B. The optional sound suppression group complies with the EU 2000/14/EC sound limit of 107 dB(A). This quiet operation lets the 120H work with minimal disturbance to the surroundings.

Low Emissions

The 120H Motor Grader is even more environmentally friendly than its predecessors with reductions in NOx, hydrocarbon, and particulate emissions. It meets or exceeds all U.S. EPA Tier II and EU Stage II emissions control standards worldwide.

Dry Machine

Lubricant fill points and filters are designed to minimize spillage. O-ring face seals, Cat XT hose and Cat hydraulic cylinders protect against leaks.

Ozone Protection

To help protect the earth's ozone layer, air-conditioning units use a refrigerant free of chloroflourocarbons (CFCs).

Customer Support

Cat dealer services help you operate longer with lower costs.

Product Support

You will find nearly all parts at our dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at substantial cost savings.

Machine Selection

Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.

Purchase

Look past initial price. Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.

Customer Support Agreements

Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer's investment.

Operation

Improving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your machine investment.

Maintenance Services

Talk to your dealer about the range of available maintenance services. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM Analysis and Coolant Sampling and Technical Analysis help avoid unscheduled repairs.

Replacement

Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

ELECTRICAL

 Alarm, back-up

 Alternator, 35 ampere, sealed

 Batteries, maintenance free, 750 CCA

 Electrical system, 24 volt

 Lights, stop and tail

 Motor, starting

 Product Link connection

OPERATOR ENVIRONMENT

 Accelerator

 Ashtray and lighter

 Coat hook

 Control console, adjustable

 Cup holder

 EMS III operator warning system

 Panel gauges inside the cab

 Hydraulic controls, load sensing

 Meter, hour, digital

 Mirror, inside rearview, wide angle

 Mounting bracket, general purpose

 Power steering, hydraulic

 ROPS cab, sound suppressed, low profile

 Seat, cloth, covered adjustable

 Seat belt, retractable 76 mm (3 in)

 Steering wheel, tilt, adjustable

 Storage area for cooler/lunchbox

 Sunscreen, front windshield

 Throttle control, electronic

 Washer / wipers, (3) front windshields

 Windows, fixed lower front

POWERTRAIN

 Air cleaner with dry type radial seal, service indicator, sutomatic dust ejector

 Air to air after cooler (ATAAC)

 Brakes - oil disc, four-wheel air actuated

 Demand fan

 Differential, lock-unlock

 Engine, 3126 DITA diesel with VHP, automatic derate, automatic idle control

 Fuel tank, sediment drain

 Fuel-water separator

 Lube for life pump drive shaft

 Muffler, under hood

 Parking brake - multi-disc, sealed and oil cooled

 Pre-screener

 Priming pump, fuel

 Serpentine belt, automatic tensioner

 Tandem drive

 Transmission

OTHER STANDARD EQUIPMENT

 Antifreeze -35°C (-30°F)

 Bumper, rear, integrated, with hitch

 Clutch, circle drive slip

 Cutting edges

 Doors, engine compartment, locking

 Drawbar - 4 shoe, replaceable wear strips

 Endbits - 16mm (5/8 in) DH-2 steel, 16mm (5/8 in) mounting bolts

 Frame, articulated with safety lock

 Fuel tank, 90 gallon (340 L)

 Fueling, ground level

 Ground level engine shutdown

 Horn, air

 Link bar, 7 position

 Moldboard

 Radiator cleanout access

 SOS ports: engine, hydraulic, transmission, coolant, fuel

 Tool box

TIRES, RIMS, & WHEELS

 Partial allowance: 13.00-24 10PR on 9" single piece rims

Partial allowance: 13.00-24 10PR on 9" single piece rims

Accumulators, blade lift - 71 kg (156 lb)

Air conditioner with heater and pressurizer - 49 kg (107 lb)

Air dryer - 13 kg (29 lb)

Alternator, 75 ampere 6 kg (15 lb)

Batteries, heavy duty, 1100 CCA - 44 kg (96 lb)

Blade, 3962 mm x 688 mm x 25 mm (13' ft x 27 in x 1 in) - 209 kg (460 lb)

Blade, 4267 mm x 610 mm x 22 mm (14 ft x 24 in x 7/8 in)- 75 kg (166 lb)

Blade, 4267 mm x 688 mm x 25 mm (14 ft x 27 in x 1 in) - 261 kg (574 lb)

Blade, front-mounted 2750 mm x 980 mm (9 ft x 39 in) - 850 kg (1874 lb)

Blade, front - 1180 kg (2602 lb)

Blade, front, narrow - 1100 kg (2425 lb)

Blade, front with foldable ends - 1525 kg (3362 lb)

Cab, ROPS, high profile, sound suppressed - 77 kg (170 lb)

Canopy, ROPS, high profile, with rear wall and window - -41 kg (-90 lb)

Converter, 25 ampere, 24V to 12V - 5 kg (11 lb)

Covers, metallic, fuel tank 11 25

Cutting edges for 22 mm (7/8 in) thick blade

 203 mm x 19 mm (8 in x 3/4 in) for 3.7 m blade

 203 mm x 19 mm (8 in x 3/4 in) for 4.1 m blade

 203 mm x 16 mm (8 in x 5/8 in) for 3.7 m blade

 203 mm x 16 mm (8 in x 5/8 in) for 4.1m blade

203 mm x 19 mm (8 in x 3/4 in) for 3.7 m blade

203 mm x 19 mm (8 in x 3/4 in) for 4.1 m blade

203 mm x 16 mm (8 in x 5/8 in) for 3.7 m blade

203 mm x 16 mm (8 in x 5/8 in) for 4.1m blade

Cutting edges for 25 mm (1 in) thick blade

 203 mm x 19 mm (8 in x 3/4 in) for 3.7 m blade

 203 mm x 19 mm (8 in x 3/4 in) for 4.1 m blade

Endbits, overlay, reversible - 11 kg (24 lb)

Engine, VHP - 4 kg (10 lb)

Extensions, blade 610 mm (2 ft) right and left

 for 22 mm (7/8 in) thick blade - 114 kg (250 lb)

 for 25 mm (1 in) thick blade - 148 kg (325 lb)

for 22 mm (7/8 in) thick blade - 114 kg (250 lb)

for 25 mm (1 in) thick blade - 148 kg (325 lb)

Fan, defroster, front and rear - 2 kg (4 lb)

Graderbit system, penetration bit type - 163 kg (360 lb)

Guard, lower platform - 23 kg (50 lb)

Guard, transmission - 98 kg (215 lb)

Hammer, with mounting - 5 kg (12 lb)

Heater, engine coolant - 1 kg (3 lb)

Heater, cab - 14 kg (30 lb)

Heater, cab, with pressurizer - 18 kg (40 lb)

Hydraulic arrangements with one or more additional hydraulic valves are available for front scarifier, rear ripper-scarifier, dozer, dozer angle, snow plow and snow wing. See dealer price list.

Hydraulic lockout - 2 kg (5 lb)

Lighting systems:

 bar mounted, directional and headlights - 13 kg (28 lb)

 cab mounted, directional and headlights - 9 kg (20 lb)

 cab and bar mounted, directional, headlights and work lights - 22 kg (48 lb)

 cab and bar mounted, high, directional, headlights and work lights - 22 kg (48 lb)

 work lights, front and rear - 6 kg (13 lb)

 snow wing light, right - 18 kg (40 lb)

 warning light, cab or canopy mounted - 3 kg (6 lb)

Mirrors, dual, inside mounted

Mirrors, outside mounted - 8 kg (18 lb)

Mirrors, outside mounted, heated - 11 kg (25 lb)

Power port, 12-V - 2 kg (5 lb)

Push plate, counterweight - 919 kg (2025 lb)

Precleaner, turbine-type 2 kg (5 lb)

Radio ready, entertainment

Receptacle, starting, plug-in - 2 kg (5 lb)

Rims, tires - refer to dealer price list

Ripper, rear - 612 kg ( 1350 lb)

Ripper-scarifier/tooth, one - 12 kg ( 26 lb)

Scarifier, front mounted, V-type - 845 kg (1862 lb)

Scarifier, front mounted, straight - 903 kg (1988 lb)

Seat, cloth-covered, contour air suspension

Seat, vinyl-covered, contour suspension

Sound suppression - 91 kg (200 lb)

Speedometer/tachometer - 1 kg (2 lb)

Steering, secondary - 50 kg (111 lb)

Sunshade, rear window - 3 kg (7 lb)

Windows, lower front, opening - 3 kg (6 lb)

Windows, sliding side - 4 kg (8 lb)

Wiper and washer, rear, intermittent - 7 kg (16 lb)

Wiper and washer, front, intermittent

European roading group which provides an additional air tank, air circuit protection valve and two position lights with integral turn signals. Dealer supplied equipment is required to meet some specific country on-road requirements - 23 kg (52 lb)