Case 621D Loader Parts Catalog (87535531_int_USN)

The Case 621D loader usually lives in gravel pits, batch plants, and busy yards, loading trucks all day in dust and mud. This parts catalog is what I’d pull up when I need to identify exactly which components are on your machine before ordering anything. Say you’ve got play in the front axle or a leaking rotary joint—this book lets me break the assembly down on paper first, so I can see every seal, shim, and fastener I’ll need instead of guessing.

Applications & Use Cases

• Trace how the lower and upper carriage components stack together so you don’t miss spacers or wear shims during a rebuild quote.
• Cross-check main frame and axle support parts to confirm you’re ordering the correct revision for your serial range.
• Inspect exploded views of the wheel assemblies and drive shafts to catch small seals and snap rings that are easy to overlook.
• Verify fuel and oil tank fittings, brackets, and lines before replacing a damaged tank or routing new hoses.
• Compare counterweight and rotary joint variations to avoid mis-orders when machines have mid-production changes.

FAQ

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

A: Yes, it’s practical on a tablet; you can zoom in on the exploded views and part lists right next to the machine.

Q: Is it worth printing pages from this catalog?

A: Many techs print the specific assemblies they’re working on, mark them up with notes, and keep them in the job folder for future reference.

Safety Note

Always verify parts with the machine tag and follow the official service procedures and lockout practices before any work.

Case 621D Loader Index:

LOWER & UPPER CARRIAGE
MAIN FRAME
AXLE SYSTEM
SUPPORT PARTS
WHEEL ASSEMBLY
DRIVE SHAFTS
FUEL & OIL TANKS
ROTARY JOINTS
COUNTERWEIGHT
ENGINE UNIT
FUEL SYSTEM
COOLING GROUP
TRAVEL DRIVE / SWING UNIT
CLUTCH GROUP
STEERING SYSTEM
BRAKING UNIT
HYDRAULIC SYSTEM
PUMPS & MOTORS
VALVE SYSTEM
HYDRAULIC CYLINDERS
CAB HEATING / AIR CONDITION
LUBRICATION UNIT
BATTERY & ELECTRICAL PARTS
WIRING SYSTEM
SLIPRING
OPERATOR CAB
SAFETY & GUARD EQUIPMENT
PANELS & COVERS
CAB GUARDS
COLD WEATHER KIT
BOOM ASSEMBLY
STICK ASSEMBLY
ENGINE COMPONENT GROUP

CNH