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John Deere 622 G-Tier

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Features

Operator Essentials

View inside G-Tier motor grader cab showing steering wheel and lever controls on forward rack

Conventional lever-operated mechanical controls arranged in an ergonomic antler-rack configuration and centralized machine-function switches provide for intuitive use. Auto-Shift Plus automatically shifts through roading gears without the need to use the inching pedal.

Foundational Circle Options

Single input drive with slip clutch on motor grader

John Deere offers three circle options for motor graders: the premium circle, which boosts torque and speed while requiring minimal service; the single input circle for lighter‑load applications; and the dual input circle for heavier‑load use and improved gearbox durability. An optional slip clutch (standard on the premium circle) protects key components when the moldboard hits an immovable object.

Simple and Practical Maintenance

Rear left overhead studio view of motor grader with maintenance access panels open and fan assembly swung out

All daily service points are grouped on the left side of the machine for convenient ground-level access. On the right, periodic-service points including the engine oil, hydraulic, transmission, differential, and fuel filter bank are within easy reach. Cooling package minus stacked coolers plus hinged swing-out fan simplifies core cleanout.

Specifications

Engine

Non-Road Emission StandardsEPA Final Tier 4/EU Stage V
Manufacturer And ModelJohn Deere PowerTech™ PSS 6.8L
Cylinders6
Displacement 6.8 L
Displacement 414 cu in.
Net Engine Power Gear 1127 kW
Net Engine Power Gear 1170 hp
Net Engine Power Gear 2138 kW
Net Engine Power Gear 2185 hp
Net Engine Power Gear 3149 kW
Net Engine Power Gear 3200 hp
Net Engine Power Gear 4157 kW
Net Engine Power Gear 4210 hp
Net Engine Power Gear 5157 kW
Net Engine Power Gear 5210 hp
Net Engine Power Gear 6160 kW
Net Engine Power Gear 6215 hp
Net Engine Power Gear 7164 kW
Net Engine Power Gear 7220 hp
Net Engine Power Gear 8168 kW
Net Engine Power Gear 8225 hp
Net Peak Torque1035 Nm
Net Peak Torque763 lb-ft
Net Torque Rise38 %
AspirationSeries turbocharged, charge-air cooled
LubricationFull-flow spin-on filter and integral cooler
Air Cleaner With Restriction IndicatorDual element, dry

Powertrain

Six Wheel DriveAutomatic dual path hydrostatic drive; increases tractive effort and front-end control; includes separate left and right systems with variable-displacement pumps, axial piston wheel motors, and free wheel at transport speeds; operator-selectable 15-position rotary aggressiveness control and inching capability down to 0 mph; precision mode (propelled by front wheels only)
Six Wheel Drive Effective Gears1–4 forward and reverse
Precision Mode Effective Gears1–3 forward only
Precision Mode Operating Speeds8 km/h
Precision Mode Operating Speeds5 mph
Hydrostatic Pumps (2) Each53 cm³
Hydrostatic Pumps (2) Each3.2 cu in.
Wheel Motors57 cm³
Wheel Motors3.5 cu in.
Final Reduction38.7:1
Transmission TypeDirect-drive John Deere PowerShift Plus™, modulated shift-on-the-go, Event-Based Shifting (EBS), inching pedal; independent transmission reservoir with separate filtration and cooling system
Transmission Gears Forward8
Transmission Gears Reverse8
Maximum Travel SpeedsNo tire slip at 2,180 rpm, 14.0-R24 tires
Maximum Travel Speeds Gear 14 km/h
Maximum Travel Speeds Gear 12.5 mph
Maximum Travel Speeds Gear 25.6 km/h
Maximum Travel Speeds Gear 23.5 mph
Maximum Travel Speeds Gear 37.7 km/h
Maximum Travel Speeds Gear 34.8 mph
Maximum Travel Speeds Gear 410.9 km/h
Maximum Travel Speeds Gear 46.8 mph
Maximum Travel Speeds Gear 516.4 km/h
Maximum Travel Speeds Gear 510.2 mph
Maximum Travel Speeds Gear 623.2 km/h
Maximum Travel Speeds Gear 614.4 mph
Maximum Travel Speeds Gear 732.3 km/h
Maximum Travel Speeds Gear 720.1 mph
Maximum Travel Speeds Gear 845.5 km/h
Maximum Travel Speeds Gear 828.3 mph
Front AxleHeavy-duty welded fabrication
Front Axle Oscillation, Total32 degrees
Front Axle Wheel Lean Angle, Each Direction20 degrees
DifferentialsSpiral bevel; hydraulically actuated, clutch type can be applied on-the-go; selectable manual or automatic differential lock
Steering (All Models Include Steering Wheel)All-hydraulic power-frame articulation for maneuverability and productivity; crab steering reduces side drift, positions tandems on firm ground, and increases side-slope stability
Turning Radius: Front Steer And Articulation7.21 m
Turning Radius: Front Steer And Articulation284 in.
Turning Radius: Front Steer And Articulation23.67 ft
Articulation (Both Right And Left)22 degrees
Final DrivesInboard-mounted planetary sealed in cooled, filtered oil
BrakesFoot-controlled, hydraulically operated, multiple wet-disc brakes sealed in pressurized, cooled, filtered oil; both independent systems effective on all 4 tandem wheels
Primary And Secondary BrakesHydraulically actuated, inboard of tandem pivot, self-adjusting, sealed in cooled and filtered oil, multi-disc (ISO 3450)
Parking BrakeAutomatically spring applied, hydraulically released, oil cooled, self-adjusting (ISO 3450)

Option Weights

3.66-m x 610-mm x 22-mm Moldboards With 203-mm x 19-mm Cutting Edge And 16-mm Hardware45 kg
12-ft x 24-in. x 7/8-in. Moldboards With 8-in. x 3/4-in. Cutting Edge And 5/8-in. Hardware99 lb.
Extensions 610 mm Right Or Left116 kg
Extensions 24 in. Right Or Left255 lb.
Overlay End-Bits, Reversible (One Pair) For 152 mm Cutting Edge19.5 kg
Overlay End-Bits, Reversible (One Pair) For 6 in. Cutting Edge43 lb.
Overlay End-Bits, Reversible (One Pair) For 203 mm Cutting Edge23 kg
Overlay End-Bits, Reversible (One Pair) For 8 in. Cutting Edge51 lb.
Circle Drive Slip Clutch9 kg
Circle Drive Slip Clutch20 lb.
Standard Circle0 kg
Standard Circle0 lb.
Premium Circle289 kg
Premium Circle638 lb.
Moldboard Impact-Absorption System43 kg
Moldboard Impact-Absorption System95 lb.
Ripper/Scarifier, Rear Mounted With Hitch And Ripper Shanks (3)1139 kg
Ripper/Scarifier, Rear Mounted With Hitch And Ripper Shanks (3)2510 lb.
Scarifier Shanks With Teeth, 9 For Rear Ripper/Scarifier68 kg
Scarifier Shanks With Teeth, 9 For Rear Ripper/Scarifier150 lb.
Rear Counterweight With Integral Rear Hitch727 kg
Rear Counterweight With Integral Rear Hitch1603 lb.
Rear Hitch54.4 kg
Rear Hitch120 lb.
Push Block, Front907 kg
Push Block, Front2000 lb.
Scarifier, Front Mounted With Teeth (5)831 kg
Scarifier, Front Mounted With Teeth (5)1833 lb.
Scarifier, Midmount With 11 Teeth1481 kg
Scarifier, Midmount With 11 Teeth3265 lb.
Front Lift Group (Balderson-Style)763 kg
Front Lift Group (Balderson-Style)1682 lb.
Opening Front and Side Windows14.5 kg
Opening Front and Side Windows32 lb.
Premium Seat, Air Suspension, Heated, Adjustable Arm And Headrests13 kg
Premium Seat, Air Suspension, Heated, Adjustable Arm And Headrests28 lb.
Coolant Heater4 kg
Coolant Heater9 lb.
Quick Service11 kg
Quick Service24 lb.
Secondary Steering26 kg
Secondary Steering58 lb.
Fire Extinguisher14.5 kg
Fire Extinguisher32 lb.
Lighting Packages - 10 Halogen Lights4.5 kg
Lighting Packages - 10 Halogen Lights10 lb.
Lighting Packages - 18 Halogen Lights8 kg
Lighting Packages - 18 Halogen Lights18 lb.
Lighting Packages - 18 LED Lights7 kg
Lighting Packages - 18 LED Lights16 lb.
High Front Light Bar For Snowplowing20 kg
High Front Light Bar For Snowplowing44 lb.
Auxiliary Hydraulic Control Valve Section And Controls7 kg
Auxiliary Hydraulic Control Valve Section And Controls15 lb.
Hydraulics For Front-Mounted Equipment9 kg
Hydraulics For Front-Mounted Equipment19 lb.

Wheels And Tires Option 2

Wheel Size17.5R25 on 356-mm (14 in.) Rim
Wheel Size Wheel Tread On Ground2.16 m
Wheel Size Wheel Tread On Ground85 in.
Wheel Size Ground Clearance (Front Axle)587 mm
Wheel Size Ground Clearance (Front Axle)23.1 in.

Machine Dimensions

Height To Top Of Cab3.18 m
Height To Top Of Cab10.42 ft
Height To Top Of Exhaust3.1 m
Height To Top Of Exhaust10.17 ft
Height To Top Of Blade-Lift Cylinders3.05 m
Height To Top Of Blade-Lift Cylinders10 ft
Tandem Axle Spacing1.54 m
Tandem Axle Spacing5.08 ft
Blade Base2.57 m
Blade Base8.42 ft
Wheelbase 6.16 m
Wheelbase 20.25 ft
Overall Length8.89 m
Overall Length29.17 ft
Overall Length With Scarifier9.69 m
Overall Length With Scarifier31.75 ft
Overall Length With Pushblock And Ripper9.99 m
Overall Length With Pushblock And Ripper32.75 ft
Overall Length With Scarifier And Ripper10.59 m
Overall Length With Scarifier And Ripper34.75 ft
Overall Length with Front Mounted Blade and Ripper10.6 m
Overall Length with Front Mounted Blade and Ripper34.75 ft
Overall Width 14.00-R24 Tires2.49 m
Overall Width 14.00-R24 Tires8.17 ft
Overall Width 17.5-R25 Tires2.64 m
Overall Width 17.5-R25 Tires8.67 ft

Scarifier

Front TypeV-type toolbar with 2-pitch positions and hydraulic float
Midmount TypeRadial linkage, with NeverGrease™ pin joints; V-type manual 3-pitch positions and hydraulic float
Front Width Of Cut1.2 m
Front Width Of Cut48 in.
Front Width Of Cut4 ft
Midmount Width Of Cut1.19 m
Midmount Width Of Cut46.7 in.
Midmount Width Of Cut3.92 ft
Front Number Of Shanks/Teeth5
Front Number Of Shanks/Teeth (Maximum)9
Midmount Number Of Shanks/Teeth11
Front Lift Above Ground589 mm
Front Lift Above Ground23.2 in.
Midmount Lift Above Ground335 mm
Midmount Lift Above Ground13.2 in.
Front Maximum Depth335 mm
Front Maximum Depth (in.)13.2 in.
Midmount Maximum Depth325 mm
Midmount Maximum Depth12.8 in.
Front Shank Spacing146 mm
Front Shank Spacing5.75 in.
Midmount Shank Spacing117 mm
Midmount Shank Spacing4.6 in.
Front Shank Size (mm x mm)25 x 76
Front Shank Size (in. x in.)1 x 3
Midmount Shank Size (mm x mm)25 x 76
Midmount Shank Size (in. x in.)1 x 3

Electrical

Voltage 24 V
Number Of Batteries2
Battery Capacity1400 CCA
Reserve Capacity440 min.
Amp Hour Rating224 amp-hr
Base Alternator Rating130 amp
LightsDriving lights; 2 high- and 2 low-beam halogen headlights; front and rear LED turn signals and marker lights; LED brake and hazard warning lights

Operating Weights

Front 4802 kg
Front 10587 lb.
Rear 11999 kg
Rear 26453 lb.
Total 16801 kg
Total 37040 lb.

Blade Function

Blade TypeAll-hydraulic, industry standard lever placement of blade-function controls; includes float position; seven discrete saddle positions
Blade Range Lift Above Ground490 mm
Blade Range Lift Above Ground19.3 in.
Blade Range Blade Side Shift, Right Or Left683 mm
Blade Range Blade Side Shift, Right Or Left26.9 in.
Pitch At Ground Line Forward42 degrees
Pitch At Ground Line Back5 degrees
Shoulder Reach Outside Wheels (Frame Straight), Right Or Left2083 mm
Shoulder Reach Outside Wheels (Frame Straight), Right Or Left82 in.
Shoulder Reach Outside Wheels (Frame Straight), Right Or Left6.83 ft
Bank Cut Angle, Right Or Left90 degrees

Mainframe

Mainframe TypesWelded box construction
Width, Minimum307 mm
Width, Minimum12.1 in.
Height, Minimum307 mm
Height, Minimum12.1 in.
Thickness, Side16 mm
Thickness, Side0.63 in.
Thickness, Top And Bottom Plate23 mm
Thickness, Top And Bottom Plate0.89 in.

Circle

Circle TypeWelded construction, heat-treated, machined for flatness
Standard Circle Diameter1524 mm
Standard Circle Diameter60 in.
Premium Circle Diameter1524 mm
Premium Circle Diameter60 in.
Standard Circle Rotation360 degrees
Premium Circle Rotation360 degrees
Standard Circle Rotation SurfaceQuick-change bronze or nylon wear inserts
Premium Circle Rotation SurfaceSealed and lubricated roller element slewing bearing
Standard Circle Pinion/Ring Gear ConnectionAdjustable backlash and open for serviceability
Premium Circle Pinion/Ring Gear ConnectionNo adjustment; fully sealed and lubricated
Standard Circle DriveHydraulic motor and worm gear with positive lock
Premium Circle DriveHydraulic motor and worm gear with positive lock
Standard Circle Slip ClutchOption
Premium Circle Slip ClutchStandard
Standard Circle Circle Side Shift Right787 mm
Standard Circle Circle Side Shift Right31 in.
Premium Circle Circle Side Shift Right787 mm
Premium Circle Circle Side Shift Right31 in.
Standard Circle Circle Side Shift Left787 mm
Standard Circle Circle Side Shift Left31 in.
Premium Circle Circle Side Shift Left787 mm
Premium Circle Circle Side Shift Left31 in.

Rear Ripper/Scarifier

TypeParallel linkage, with NeverGrease pin joints, hydraulic float, and integrated hitch
Ripper Width Of Cut2.21 m
Ripper Width Of Cut87.2 in.
Ripper Width Of Cut (ft. in)7.25 ft
Scarifier Width Of Cut2.18 m
Scarifier Width Of Cut86 in.
Scarifier Width Of Cut7.17 ft
Ripper Number Of Shanks/Teeth3
Ripper Number Of Shanks/Teeth Maximum Capacity5
Scarifier Number Of Shanks/Teeth Maximum Capacity9
Ripper Lift Above Ground602 mm
Ripper Lift Above Ground23.7 in.
Scarifier Lift Above Ground810 mm
Scarifier Lift Above Ground31.9 in.
Ripper Maximum Depth426 mm
Ripper Maximum Depth16.8 in.
Scarifier Maximum Depth323 mm
Scarifier Maximum Depth12.7 in.
Ripper Shank Size (mm x mm)61.5 x 133
Ripper Shank Size (in. x in.)2.42 x 5.25
Scarifier Shank Size (mm x mm)25 x 76
Scarifier Shank Size (in. x in.)1 x 3

Operator Station

Rollover Protective StructureROPS (ISO 3471-2008)
Falling Object Protective StructureFOPS (ISO 3449-2005)

Refill Capacities

Engine TypeEPA Final Tier 4/EU Stage V
Fuel Tank397 L
Fuel Tank105 gal.
Diesel-Exhaust Fluid (DEF) Tank22.5 L
Diesel-Exhaust Fluid (DEF) Tank6 gal.
Cooling System51 L
Cooling System13.5 gal.
Engine Oil With Filter31.5 L
Engine Oil With Filter8.3 gal.
Transmission Fluid28.4 L
Transmission Fluid7.5 gal.
Differential Housing38 L
Differential Housing10 gal.
Tandem Housings (Each)74 L
Tandem Housings (Each)19.5 gal.
Circle Gearbox5.7 L
Circle Gearbox1.5 gal.
Hydraulic Reservoir60.5 L
Hydraulic Reservoir16 gal.

Hydraulics

TypeClosed-center, pressure-compensated load-sensing (PCLS), variable-displacement piston pump
Maximum Pump Flow2112 L/min
Maximum Pump Flow56 gpm
Maximum System Pressure18961 kPa
Maximum System Pressure2750 psi
Pump Displacement (cm3)90 cm³
Pump Displacement5.5 cu in.

Cutting Edge

Cutting Edge TypeDura-Max™ through-hardened steel edge
Thickness 16 mm
Thickness 0.62 in.
Width 152 mm
Width 6 in.

Tire, Rim, And Fender Option Weights

14.00-R24, Radial, G2/L2 General Purpose0 kg
14.00-R24, Radial, G2/L2 General Purpose0 lb.
14.00-R24, Radial, G2/L2 Snow40.8 kg
14.00-R24, Radial, G2/L2 Snow90 lb.
17.5-R25, Radial, L2 General Purpose51.7 kg
17.5-R25, Radial, L2 General Purpose114 lb.
17.5-R25, Radial, G2/L2 Snow95.3 kg
17.5-R25, Radial, G2/L2 Snow210 lb.
17.5-R25, Radial, G3/L3 General Purpose141.5 kg
17.5-R25, Radial, G3/L3 General Purpose312 lb.
Multi-Piece Rim 254 x 610 mm0 kg
Multi-Piece Rim 10 x 24 in.0 lb.
Multi-Piece Rim 356 x 635 mm85.3 kg
Multi-Piece Rim 14 x 25 in.188 lb.
Front Fenders99 kg
Front Fenders218 lb.
Rear Fenders158 kg
Rear Fenders348 lb.

Wheels And Tires Option 1

Wheel Size14R24 on 254-mm (10 in.) Rim
Wheel Size Wheel Tread On Ground2.08 m
Wheel Size Wheel Tread On Ground82 in.
Wheel Size Ground Clearance (Front Axle)587 mm
Wheel Size Ground Clearance (Front Axle)23.1 in.

Cooling

Engine Coolant Rating-37 ℃
Engine Coolant Rating-34 °F

Typical Operating Weight With Equipment

Front 5476 kg
Front 12072 lb.
Rear 13542 kg
Rear 19856 lb.
Total 19018 kg
Total 41928 lb.
Typical Maximum Operating Weight22680 kg
Typical Maximum Operating Weight50000 lb.

Dozer Blade

Front Dozer Blade TypeParallel linkage and hydraulic float
Lift Above Ground706 mm
Lift Above Ground27.8 in.

Moldboard

Moldboard MaterialHigh-strength, pre-stressed for higher strength; wear-resistant, high-carbon steel and reversible end bits
Moldboard TypeBlade side-shift wear system includes quick-change replaceable wear inserts and quick-adjust jackscrew system
Base Length3.66 m
Base Length144 in.
Height 0.61 m
Height 24 in.
Thickness 22 mm
Thickness 0.88 in.

Front Lift Group (Balderson-Style)

Front Lift Group TypeParallel linkage, mechanical pins, and hydraulic float
Lift Above Ground (Top Of Tube)1864 mm
Lift Above Ground (Top Of Tube)73.4 in.
Lift Range988 mm
Lift Range38.9 in.

Blade Pull

Blade Pull At Maximum Operating Weight20412 kg
Blade Pull At Maximum Operating Weight45000 lb.

Draft Frame (Drawbar)

Draft Frame TypeWelded box construction machined for flatness with double ball-and-socket pivot connection