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SEM Motor graders 921
Request a QuoteKey Information
Operating Weight
15,930 kg
Minimum turning radius
7.8 m
Wheelbase
6,140 mm
Overview
High productivity
Load-sensing hydraulic system ensures precise and consistent blade movement
High reliability
A-shaped drawbar provides strength in all blade positions
Comfort
Industry-class control layout with reduced lever effort to reduce operator fatigue
Key Features
- SEM Tandem Axle
- Control System
- Blade Float
- Hydraulic System
- Drawbar
- Front Frame
- Control Layout
- Cat ® Product Link™
- Large Cab
SEM Tandem Axle
Leveraging Caterpillar designing and experience on MG tandem axle Improved bearing Layout and optimized load distribution with 4 planetary gears final drive Less down time and reduced labor and service cost for maintenance and repairing Longer service interval for lubrication oil change Leading in class manufacturing and quality control level, mandatory performance testing before delivering to MG assembly line
Control System
7 position link bar with electric over hydraulic control allows ease of operation from within the cab Optimum blade reach capability, quick DCM re-positioning for greater reach for better working on high bank side slope The link bar is essential for extending reach capability when cutting a bank slope or back slope of a ditch Replaceable bushings reduce service time and cost
Blade Float
Standard blade float function allows blade to lower without hydraulic pressure for increased versatility Blade float is engaged by pushing the left and right lift cylinder controls all the way forward past the detent Provides protection for machine and pavement during snow removal and snow plowing
Hydraulic System
Proportional Priority Pressure Compensating (PPPC) Valves contain specifically cut spools for motor grader applications, continuously matching of hydraulic flow and pressure to power demands, allowing ease of multi-function control for optimizing working efficiency World-class variable displacement piston pump, efficiently reduces power consumption and hydraulic system heat, improving fuel efficiency Load-sensing hydraulic system provides consistent and precise blade movement, improving finishing performance Inboard lock check valves within PPPC, prevents inadvertent cylinder movement and potential leaks
Drawbar
A-frame tubular design drawbar provides maximum strength and durability Replaceable drawbar draft ball (bolted - not welded) for less service time and cost Easy removal of wear shims to adjust drawbar
Front Frame
Flanged box section design removes welds from high stress areas, improving reliability and durability Continuous top and bottom plate construction provides consistency and strength, improving front frame durability Hydraulic hose routing minimizes exposure to damage and provides quick access for service Maintenance-free bushings improve durability and reduce overall service cost
Control Layout
Short throw levers are efficiently spaced, allowing ease of multi-function control Short lever travel (40mm) with low lever effort reduces operator fatigue
Cat ® Product Link™
Cat ® Product Link™ will support your business, and accurately convey information of the equipment to relevant personnel in a timely and effective manner for your better equipment management.
Large Cab
High performance dashboard with 3 levels alarming monition system Cab mounted on the front frame provides exceptional view to blade and front axle even during articulation Large cab with 1.9m height and 30% larger space than most competitors, provides exceptional comfort
Contact Our Experts
Morocco
International
Monday to Friday 8am-5:30pm (UTC)
Product Specifications for 921
- Model
- ModelSEM921
- Operating Weight
- Standard15,930kg
- With Front & Rear Counterweight15,930kg
- With Front Blade16,530kg
- With Ripper+Front Blade17,340kg
- Operating Specifications
- Top Speed, Forward40kph
- Top Speed, Reverse25kph
- Min. Turning Radius7,800mm
- Articulation Angle, Left /Right20°
- Gradeability30°
- Wheelbase6,140mm
- Travel Speed, Forward5.3/9.1/12/20/25/40kph
- Travel Speed, Reverse5.3/12/25kph
- Drawbar Pull90kN
- Engine
- Engine ManufacturerSDEC
- Engine ModelSC9DK220G2
- Rated Power162 @ 2,200kW @ RPM
- Max. Torque920 @ 1,400kN @ RPM
- EmissionTier 2
- Displacement8.82L
- Bore114L
- Stroke144L
- Number of Cylinders6
- Transmission
- Brand / ManufacturerHangchi
- Type6WG180
- Powershift Pressure1,3~1.7MPa
- Forward / Reverse Gears6 Forward / 3 Reverse
- Tandem Axle
- Brand / ManufacturerSEM / Caterpillar
- ModelSEM ST23
- DifferentialNo-Spin
- Service BrakeAir to Oil, Disc
- SecondaryDual Circuit
- Oscillation Front Up15°
- Oscillation Front Down25°
- Front Axle
- Ground Clearance602mm
- Wheel Lean, Left / Right18°
- Max. Oscillation±16°
- Steering Range, Left / Right47.5°
- Hydraulic System
- Circuit TypeLoad sensing,PPPC
- Pump TypeVariable Piston
- Max. Pump Output162.8L/min
- Max. System Pressure22MPa
- Standby Pressure2.4~2.6MPa
- Moldboard
- Blade Width, Standard4,279mm
- Blade Width, Optional3,669/3,974mm
- Moldboard Height610mm
- Moldboard Thickness25mm
- Throat Clearance85mm
- Float FunctionSTD
- Moldboard Sideshift, LH948.5mm
- Moldboard Sideshift, RH824.5mm
- Circle Centershift, LH926mm
- Circle Centershift, RH758mm
- Max. Blade Position Angle90°
- Blade Tip, Forward40°
- Blade Tip, Backward5°
- Max. Shoulder Reach outside of Tires, LH2,698mm
- Max. Shoulder Reach outside of Tires, RH2,407mm
- Max. Lift above Ground475mm
- Max. Cutting Depth715mm
- Max. Lifting Height475mm
- Max. Draw-Pull≥85kN
- Service Refill Capacity
- Fuel Tank320L
- Engine Oil22L
- Coolant65L
- Transmission28L
- Differential Case33L
- Tandem Case, Each Side62L
- Circle Drive, Non Slip Clutch2L
- Circle Drive, With Slip Clutch7L
- Hydraulic Oil Tank55L
- Rear Axle (Main Reducer & Tandem)157L
Media Gallery
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