Model Spotlight

Case 921G Wheel Loader: 2020+ G-Generation Large Production Wheel Loader

The Case 921G is the 2020+ G-generation of Case's 921 large production wheel loader - Tier 4 Final, full DPF + DEF + SCR aftertreatment, refined power-shift transmission, and the G-series cab. It is Case's current production large wheel loader in this size class.

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

Where the 921G fits in the Case wheel loader line

The 921G is the current production version of Case's 921 platform - successor to the 921F. It sits at the large end of the G-series production wheel loader range, above the 821G and below the 1021G. The 921G runs a Tier 4 Final Case diesel paired with full DPF + DEF + SCR aftertreatment, a refined power-shift transmission, and the G-series sealed cab.

Mechanically the articulated frame, planetary final drives, and wet-disc service brakes carry forward from the F-series. The G updates focus on emissions compliance, electronic controls, cab comfort, and telematics integration. The 47821526 receiver drier is a 921G-era AC service item available at Broken Tractor.

Case 921G Wheel Loader - Quick Specs

Class: Large Production Wheel Loader
Generation: G-Series, 2020+ (current)
Frame: Articulated
Engine: Tier 4 Final Case Diesel
Aftertreatment: DPF + DEF + SCR
Drivetrain: Power Shift
Front Tool: Hydraulic Loader
Serial Plate: Left front frame near articulation joint
Predecessor: Case 921F

Locating your serial number On the Case 921G the serial plate is on the left front frame near the articulation joint, or behind the left front tire. Confirm the full serial before ordering year-specific or running-change parts.

What changed from the 921F to the 921G

Aftertreatment. Full Tier 4 Final emissions package - DPF, DEF tank and dosing module, SCR catalyst, EGR cooler. Adds NOx sensors, DPF differential pressure sensors, and DEF quality monitoring not present on earlier tiers.
Engine controls. Updated electronic engine control with closed-loop feedback for the common-rail fuel system.
Transmission. Refined power-shift with smoother shift quality and updated electronic control.
Cab. G-series operator station with improved climate control, full-color monitor, and refined joystick controls on equipped configurations.
Telematics. Standard telematics module on most configurations.

Tier 4 Final service implications The 921G's DPF, DEF dosing, and SCR systems require clean fuel and quality DEF to stay healthy. NOx sensors and DPF pressure sensors are recurring service items. DEF quality matters - poor DEF damages the SCR catalyst. Factor aftertreatment service into the maintenance budget on any production 921G.

Engine, hydraulics, and drivetrain

The 921G runs a Tier 4 Final Case diesel through a power-shift transmission, articulated frame, and planetary final drives. The loader hydraulic circuit uses piston-pump architecture with electrohydraulic control valves. Steering is full-hydraulic articulated, driven by twin steering cylinders at the articulation joint.

Wet-disc service brakes are oil-cooled and oil-lubricated. The cooling package handles the engine radiator, hydraulic oil cooler, charge-air cooler, and AC condenser in a swing-out configuration for service access.

Common service items on the 921G

Engine internals: Case diesel pistons, rings, sleeves, bearings, gaskets. R49482 engine motor mount is a recurring service item.
Tier 4 aftertreatment: DPF, DEF tank and dosing module, SCR catalyst, EGR cooler, 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, 821 series.
Loader components: Bucket teeth, cutting edges, bushings, pivot pins, quick coupler.
Drivetrain: Power-shift clutch packs, transmission, axle seals, planetary final drives. Transmission shift lever assembly for service.
Brakes: Wet-disc service brakes. S300718 brake shoe, A12985 slave cylinder, N8695 master cylinder are recurring service items.
Electrical / ECU: Engine ECU, instrument cluster, sensors, wiring harness, telematics module. 87528688 AC blower speed resistor fits 521E through 1121F.
Cab / Climate: Seat, gauges, control levers, cab parts. 47880728 cab fresh-air filter and 47821526 AC receiver drier on cab-equipped units.

Parts we carry for the Case 921G

Category	Common Parts	Browse
Engine	Tier 4 diesel internals, mounts	R49482 Engine Mount
Aftertreatment	DPF, DEF, SCR, EGR components	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, seal kits	G109152 Bushing
Loader	Bucket teeth, cutting edges, pins, bushings	Browse Loader Components
Drivetrain	Power-shift clutch packs, shift lever, axles	Shift Lever Assembly
Brakes	N8695 master, A12985 slave, S300718 shoe	N8695 Master Cylinder
Electrical	ECU, sensors, harnesses, blower resistor	87528688 Blower Resistor
Cab / Climate	47880728 cab filter, 47821526 receiver drier	47880728 Cab Filter

Need a part for your Case 921G Wheel Loader?

Aftertreatment components, common-rail fuel parts, and power-shift drivetrain items are the highest-value service categories on a 921G. Call our parts team with your serial number and we will match the right component to your machine.

Request a Part

What to verify before ordering

Serial number. Confirm the full serial on the left front frame near the articulation joint before ordering year-specific or running-change parts.
Engine serial. Case diesel internal parts must match the engine serial number.
Aftertreatment configuration. DPF, SCR, and DEF dosing part numbers can vary across the production run. Confirm against aftertreatment serial tags.
Cab vs. ROPS canopy. Operator station equipment varied; HVAC and harness parts differ.
Tire size and axle ratio. Confirm before ordering planetary final drive or axle components.

Why the 921G still earns a paycheck

The 921G is Case's current large production wheel loader. Tier 4 Final emissions, DEF dosing, telematics, and the G-series cab bring it to current production standards. The articulated frame, planetary final drives, and wet-disc service brakes are proven across decades of the Case large-loader line.

Maintenance priorities on a 921G: clean fuel and tight water separation, DPF / DEF / SCR service per Case schedule, hydraulic oil cleanliness, brake service, and AC receiver-drier (47821526) service whenever refrigerant work is performed. Parts coverage for the G generation is available at Broken Tractor alongside the broader Case wheel loader family.