Case 521D Wheel Loader Parts Catalog (87535530_int_USN)

A 521D wheel loader usually spends its life in quarries, yards, and construction sites, doing load-and-carry work all day. This parts catalog is what I’d pull up whenever I need to identify exactly which components are on your machine before ordering. If you twist an axle seal during a bearing change or bend a step bracket working in tight stockpiles, this book lets me break the assembly down on paper, trace each piece, and match the right replacements the first time.

Applications & Use Cases

Cross-check front and rear axle breakdowns to confirm correct seals, shims, and bearings before teardown.
Identify all small hardware, spacers, and bushings in the frame and mounting areas that are easy to miss in a visual inspection.
Compare tire and wheel variants to verify rim and wheel-end parts match your loader’s configuration.
Trace driveshaft and support components to route new shafts and guards correctly and avoid mismatch.
Verify tank, guard, and structural support revisions when machines have mid‑series updates or field mods.

FAQ

Q: Can I use this catalog on a tablet in the field?

A: Yes, it’s practical on a tablet; you can zoom into exploded views to see small parts and part numbers clearly.

Q: Is it worth printing sections of this catalog?

A: Many techs print only the assemblies they’re working on and keep them with the work order for quick, greasy-hands reference.

Safety Note

Always lock out, block, and relieve stored energy on the loader before inspecting or matching any parts on the machine.

Case 521D Wheel Loader Index:

UNDERCARRIAGE COMPONENTS
FRAME AND MOUNTINGS
AXLE ARRANGEMENTS
STRUCTURAL SUPPORTS
TIRE & WHEEL SYSTEM
DRIVE SHAFTS
FLUID TANKS & RESERVOIRS
ROTARY CONNECTIONS
BALANCE WEIGHTS
POWER UNIT
FUEL DELIVERY SYSTEM
ENGINE COOLING GROUP
TRAVEL DRIVE / SWING GEAR
COUPLING DEVICES
STEERING MECHANISM
BRAKING EQUIPMENT
HYDRAULIC SYSTEM GROUP
PUMPS AND DRIVE MOTORS
VALVE ASSEMBLIES
ACTUATOR CYLINDERS
CAB HEATING & AIR CONDITION
CENTRAL LUBRICATION
ELECTRICAL PARTS & ACCESSORIES
WIRING & ELECTRICAL SYSTEM
SLIPRING DEVICE
CAB STRUCTURE MODULE
SAFETY FEATURES
PANELS AND HOUSINGS
CAB PROTECTIVE GRIDS
CLIMATE PACKAGE
BOOM UNIT
WORKING ARM / STICK
ENGINE SUBASSEMBLIES