Model Spotlight

Case 40XT Skid Steer Loader: XT-Series Cummins-Powered Skid Steer

The Case 40XT is part of the XT-series skid steer loader line - Cummins-powered, hydrostatic dual-path drivetrain, and a modernized cab and electrical layout versus the vintage 18-series. The XT generation bridges the simplicity of the 18-series and the electronics of the alpha-series that followed.

BT

Broken Tractor Editorial Team• Updated May 2026• 7 min read

Where the 40XT fits in the Case skid steer line

The 40XT sits in the XT-series Case skid steer range between the Case 1845C and the Case 60XT. Cummins industrial diesel, hydrostatic dual-path drive, and the XT-series cab with improved ergonomics over the 18-series predecessors. It targets contractors who want vintage-era serviceability with a modern-enough operator station.

Engine, hydraulics, and drivetrain

The 40XT runs a Cummins 4-390 3.9L four-cylinder naturally aspirated diesel rated at 60 hp gross / 56 hp net through a hydrostatic dual-path drivetrain - closed-loop pumps drive sprocket-shaft motors. Loader hydraulics use a piston pump with electrohydraulic-pilot or mechanical control valves and direct-acting lift and tilt cylinders.

The Cummins B-series base engine is one of the most-supported industrial diesels ever produced, which keeps long-term parts availability strong. The hydrostatic dual-path drive is the same broad design family used across the XT and into the alpha-series - drive chains and sprockets transfer motor output to the wheels, and rebuilds are well-documented.

Common service items on the 40XT

• Engine internals: Cummins 4-390 3.9L pistons, rings, sleeves, bearings, gaskets. Mechanical-injection (early) and electronic (late) variants exist - confirm by serial.
• Fuel system: Cummins fuel injection, injectors, lift pump, filters, water separator.
• Cooling system: Radiator, water pump, thermostat, fan, hoses, belts.
• Hydraulics: Loader lift and bucket tilt cylinder seal kits, piston-pump rebuilds, control valves, hoses. The DMEL1075 cylinder spanner wrench is the right tool for cylinder gland service.
• Drivetrain: Hydrostatic dual-path pumps and drive motors, drive chains, sprockets, axles. The D64175 sprocket shaft needle bearing cross-fits broadly across Case skid steers.
• Hardware: The 191048A2 axle stud and nut cross-fits Case skid steer axle studs across the XT family.
• Brakes / control: Park brake, control linkage, and the 48139268 control shock absorber for Case/NH skid steer control valves.
• Electrical: Starter, alternator, wiring harness, gauges, switches, and the 47405956 windshield wiper blade on cab-equipped XT units.
• Cab / operator station: Seat, cab glass, ROPS canopy, gauges, joystick controls.

Parts we carry for the Case 40XT

What to verify before ordering

• Serial number. Confirm the serial on the Case 40XT before ordering year-specific parts. XT-series saw running changes through production.
• Engine serial. Cummins 4-390 internal parts must match the engine serial. Mechanical-injection vs. electronic-injection variants use different fuel system components.
• Hydraulic cylinder bore. Cylinder seal kit fit depends on bore dimension - measure before ordering.
• Cab vs. ROPS canopy. Operator station equipment varied between configurations - glass, wiper, and HVAC parts only apply to cab-equipped machines.

Why the 40XT still earns a paycheck

The Case 40XT is the XT-series Case skid steer that bridges the vintage 18-series simplicity and the alpha-series modern electronics. Cummins diesel reliability, hydrostatic dual-path service-friendliness, and modern-enough cab ergonomics keep it a working machine on contractor yards two decades after production.

Maintenance priorities on a 40XT: clean fuel and quality filtration on the Cummins, hydraulic oil at temperature, drive-chain tension, cylinder seal replacement on schedule, and brake/control linkage service. Broken Tractor maintains parts coverage across the XT-series and the broader Case skid steer family.