Model Spotlight

Case 585D Rough Terrain Forklift: D-Series Heavy-Duty RT Forklift

The Case 585D is a heavy-duty D-series rough terrain forklift built for construction, agriculture, and industrial material handling in the 5,000 lb capacity class. It carries forward the robust frame, Case diesel power, and D90752 steering motor valve architecture shared with its C-series predecessor while refining the power-shuttle drivetrain and operator station.

BT

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

Where the 585D fits in the Case forklift line

The 585D is the D-series successor to the 585C - refined power-shuttle, updated cab, and the same D90752 steering motor valve service architecture shared across the C and D generation rough terrain forklifts. It sits between the smaller 584D and the larger 586-class machines in the Case RT forklift family, and it shares a significant amount of drivetrain and cross-fit parts heritage with the later G-series (585G, 586G, 588G) forklifts and the Case loader-backhoe line.

The 585D was Case's mid-range answer for jobsite material handling - lumber yards, masonry yards, agricultural operations, and general construction. The combination of a high-torque Case diesel, power-shuttle transmission, and heavy-duty mast hydraulics put it firmly in the production-grade tier of rough terrain forklifts.

What changed from the 585C to the 585D

• Power shuttle. The D-series power-shuttle saw clutch pack and modulation revisions versus the C-series. Confirm by serial before ordering clutch-pack service parts.
• Operator station. Updated cab and ROPS canopy with revised gauge cluster and refined lever / joystick controls.
• Steering hydraulics. The D90752 steering motor valve carries forward from the C-series as the direct-fit service item across the 584C/D, 585C/D, and 586C/D rough terrain forklifts.
• Mast hydraulics. Refined control valves and updated cylinder service kits for the 5,000 lb capacity class.

Engine, hydraulics, and drivetrain

The 585D runs a Case mechanical-injection diesel through a refined D-series power-shuttle transmission. The power-shuttle is a defining feature on Case rough terrain forklifts - it gives the operator instant forward/reverse modulation under load, which is exactly the duty cycle a forklift sees in a lumber yard or on a tight jobsite.

Mast hydraulics deliver strong lift performance for the mid-range 5,000 lb capacity class through lift and tilt cylinders fed off a dedicated control valve. The D90752 steering motor valve is the canonical steering service item - it is a direct fit across the 584C/D, 585C/D, and 586C/D rough terrain forklifts.

Common service items on the 585D

• Engine internals: Case mechanical-injection diesel - pistons, rings, sleeves, head gaskets, bearings.
• Fuel system: Mechanical injection pump, injectors, lift pump, primary and secondary filters.
• Cooling system: Radiator, water pump, thermostat, fan, hoses, belts.
• Power shuttle / transmission: Power shuttle clutch packs, forward/reverse modulation, transmission filters and oil.
• Steering hydraulics: C/D-series direct-fit steering valve - D90752 steering motor valve is the canonical service part for 584C/D, 585C/D, 586C/D rough terrain forklifts.
• Mast hydraulics: Lift cylinder seal kits, tilt cylinder seal kits, chain tensioner, control valves, hoses.
• Mast components: Mast carriage rollers, lift chain inspection and replacement, fork carriage bushings, side-shift attachment service.
• Drivetrain: Front and rear axles, planetary final drives, driveshaft, axle differential service. 175978A1 needle bearing 10-pack and K395075 thrust washer are direct-fit on the 585G / 586G / 588G plus loader-backhoe.
• Brakes: A168790 parking brake disc cross-fits Case forklift / loader-backhoe / trencher applications - high-volume service item. Service brakes and brake hydraulics also.
• Cab / operator station: Seat, joystick / lever controls, gauges, key switch, ROPS canopy or enclosed cab. 377594A5 cab air filter fits Case loader tractor / backhoe / forklift cabs.
• Electrical: Starter, alternator, wiring harness, gauges, switches.

Parts and cross-fit components for the Case 585D

What to verify before ordering

• Serial number. Confirm the serial on the Case 585D before ordering year-specific parts.
• Engine serial. Internal engine parts must match the engine serial number.
• Mast configuration. Lift height, carriage width, fork length, and side-shift options vary - confirm mast spec before ordering carriage / chain / cylinder parts.
• Two-wheel vs. four-wheel drive. Some Case RT forklift models were available in 2WD and 4WD configurations - drivetrain parts differ.
• Steering motor lines. D90752 steering valve service must follow port connection instructions - incorrect line routing causes immediate steering damage.
• Power-shuttle generation. Power-shuttle transmissions saw revisions - confirm by serial before ordering clutch-pack components.

Why the 585D still earns a paycheck

The 585D is the heavy-duty D-series mid-range rough terrain forklift - robust frame and strong hydraulics in the 5,000 lb capacity class. Construction, agriculture, and industrial material-handling operators continue to run them because the Case mechanical-injection diesel, power-shuttle drivetrain, and D90752 steering valve service architecture are all well-supported in the aftermarket.

Maintenance priorities on a 585D: clean fuel, D-series power-shuttle oil and clutch-pack condition, mast chain and lift cylinder service, D90752 steering service (follow port connection instructions on install), and brake service (A168790 cross-fit). Broken Tractor maintains parts coverage for the 585D alongside the broader Case RT forklift family.