Model Spotlight

Case 721G Wheel Loader: 2017+ Current G-Generation Production Wheel Loader

The Case 721G is Case's current production-class wheel loader at the 721 size - Tier 4 Final Case diesel, full DPF + DEF + SCR aftertreatment, refined power-shift drivetrain, and the G-series cab. It replaced the 721F and carries the 721 platform into the modern emissions and telematics era.

Broken Tractor Editorial Team• Updated May 2026• 8 min read

Where the 721G fits in the Case wheel loader line

The 721G is the current production version of Case's 721 platform - successor to the 721F. G-series Tier 4 Final emissions, G-series cab, refined power-shift transmission, and updated electrohydraulic loader controls. It sits between the smaller 621G and the larger 821G in Case's current G-gen production lineup.

For the 721 size class this is the machine production fleets are running today. Tier 4 Final aftertreatment is standard, telematics is integrated, and the G-series cab brings refined ergonomics, climate control, and full-color monitor display.

Case 721G Wheel Loader - Quick Specs

Class: Production Wheel Loader
Generation: G-Series, 2017+ (current)
Frame: Articulated
Drivetrain: Power Shift
Engine: Tier 4 Final Case Diesel
Aftertreatment: DPF + DEF + SCR
Front Tool: Hydraulic Loader
Predecessor: Case 721F

Locating your serial number On the Case 721G the serial plate is on the left side near the articulation joint, above the front axle, behind the front left tire. Confirm the serial before ordering year-specific or generation-specific parts.

What changed from the 721F to the 721G

Engine and emissions. Tier 4 Final Case diesel with full DPF + DEF + SCR aftertreatment. The F generation ran Tier 4 Interim; the G stepped up to Final.
Drivetrain. Refined power-shift transmission control and improved low-speed modulation.
Loader hydraulics. Piston pump with electrohydraulic control valves for smoother metering and configurable joystick response.
Cab. G-series operator station with refined ergonomics, full-color monitor, climate control, and integrated telematics.
Lighting. LED work-light packages on most configurations.

Tier 4 Final aftertreatment - service implications The 721G's DPF, DEF, and SCR systems are reliable when fed clean fuel and quality DEF, but they require attention. DEF tank must stay topped up, DPF will request periodic high-temperature regenerations, and NOx sensors fail occasionally and trigger derate conditions if not replaced. Factor aftertreatment service into the maintenance budget on any G-gen wheel loader.

Engine, hydraulics, and drivetrain

The 721G runs a Tier 4 Final Case diesel through a refined power-shift transmission. Aftertreatment is the full DPF + DEF + SCR stack with NOx sensors, DEF dosing module, and DPF differential pressure sensors. Loader hydraulics use a piston pump with electrohydraulic control valves; steering and articulation use dedicated cylinders working off the main hydraulic circuit.

The drivetrain is a power-shift transmission feeding planetary axles with wet-disc service brakes. Articulation steering uses paired cylinders at the chassis pivot. Cab control is by electrohydraulic joysticks with configurable response curves on equipped configurations.

Common service items on the 721G

Engine internals: Case diesel pistons, rings, sleeves, bearings, gaskets. R49482 engine motor mount is a recurring service item across the Case wheel loader family.
Tier 4 Final emissions: DPF, DEF tank and dosing module, SCR catalyst, EGR cooler service, NOx sensors, DPF pressure sensors.
Fuel system: Common-rail injection components, electronic injectors, lift pump, tight water-separator filtration.
Cooling system: Radiator, water pump, thermostat, fan, charge-air cooler, hoses, belts.
Loader hydraulics: Cylinder seal kits, piston-pump rebuilds, electrohydraulic control valves, hoses.
Articulation steering: Steering cylinder seal kits, articulation pivot pins and bushings. G109152 steering cylinder bushing fits 521F, 621, 721, and 821 series.
Loader components: Bucket teeth, cutting edges, bushings, pivot pins, quick coupler hardware.
Drivetrain: Power-shift clutch packs, transmission components, axle seals, planetary final drives. Transmission shift lever assembly for service.
Brakes: Wet-disc service brakes. S300718 brake shoe, A12985 slave cylinder, and N8695 master cylinder are recurring items across the family.
Electrical / ECU: Engine ECU, instrument cluster, sensors, wiring harness, telematics module. 87528688 AC blower speed resistor fits 521E through 1121F.
Operator station: Seat, gauges, control levers, cab parts. 47880728 cab fresh-air filter on cab-equipped units.

Parts we carry for the Case 721G

Category	Common Parts	Browse
Engine	Tier 4 Final diesel internals, mounts	Browse Engine Parts
Aftertreatment	DPF, DEF, SCR, EGR, NOx sensors	Browse Aftertreatment
Fuel System	Common-rail injectors, lift pump, filters	Browse Fuel System
Cooling	Radiator, water pump, charge-air cooler, hoses	Browse Cooling
Loader Hydraulics	Piston pump, cylinders, seal kits, valves	Browse Hydraulics
Articulation Steering	G109152 bushing, pivot pins, cylinder seals	G109152 Bushing
Loader / Bucket	Bucket teeth, cutting edges, pins, bushings	Browse Loader Components
Drivetrain	Power-shift clutch packs, shift lever, axles	Shift Lever Assembly
Brakes	S300718 shoe, A12985 slave, N8695 master	S300718 Brake Shoe
Cab / Climate	87528688 blower resistor, 47880728 cab filter	87528688 Blower Resistor
Electrical	ECU, sensors, harnesses, telematics	Browse Electrical

Need a part for your Case 721G Wheel Loader?

Aftertreatment components, Tier 4 Final engine parts, and power-shift drivetrain pieces are the highest-value items on a 721G. Call our parts team with your serial number and we'll match the right component to your machine.

Request a Part

What to verify before ordering

Generation. The 721-series saw multiple generations. Confirm G-gen by serial before ordering generation-specific parts.
Serial number. Confirm the serial on the left side near the articulation joint before ordering year-specific parts.
Engine serial. Tier 4 Final Case diesel internal parts must match the engine serial number.
Aftertreatment configuration. DPF, DEF dosing, and SCR part numbers can vary across the production run. Confirm against existing aftertreatment serial tags.
Cab vs. ROPS canopy. Operator station equipment varies between configurations.
Loader configuration. Bucket and quick-coupler options affect pin and cylinder selection.

Why the 721G still earns a paycheck

The 721G is Case's current production-class wheel loader at the 721 size. Tier 4 Final emissions, DEF dosing, telematics, and the G-series cab make it the modern option for fleets standardizing on the 721 platform. The underlying power-shift drivetrain and articulated chassis carry forward the proven Case loader architecture.

Maintenance priorities on a 721G: clean fuel and tight water separation (common-rail injectors don't tolerate contamination), DPF/DEF/SCR service per Case schedule, hydraulic system condition, and wet-disc brake service. Parts coverage is available at Broken Tractor across the engine, aftertreatment, drivetrain, hydraulics, brakes, and cab systems.