Part of the Case Repair Manuals.
This 762-page Case 721D Loader Service Manual (OEM #6-47281) puts every system on this machine under one cover: engines, steering, power train, brakes, hydraulics, and mounted equipment. It also comes with a second PDF: the original Case schematic set 6-47530 for the 721D Z-Bar, 721D XR and 721D XT wheel loaders, the fold-out sheets Case packed in the manual's rear pocket. Sheets 1 through 5 are the electrical schematic; sheet 6 is the hydraulic schematic, tracing the loader and steering pumps, loader control valve, steering control valve, priority valve, brake valve and ride control. The manual adds a troubleshooting rundown with error codes for the Information and Diagnostic Center so you're not chasing a fault code with a multimeter and a hunch. Pull the transmission control valve procedures, steering pressure checks, or brake accumulator service without flipping past irrelevant chapters. Change your hydraulic filter and top off with Case AKCELA Hy-Tran Ultra at the 2000-hour mark, exactly per Case spec, not shop guesswork. Your 721D doesn't run on approximations, and neither should your service routine. Bookmarked by section so you jump straight to Power Train or Electrical, download it once and keep it open on the shop tablet while you work.
What's Inside This Case 721D Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-24 | Section Index - General, Standard Torque Specifications (Decimal Hardware, Metric Hardware, Steel Hydraulic Fittings) |
| Engines | 25-54 | Section Index - Engines, Engine and Radiator Removal and Installation, Stall Tests |
| Fuel System | 55-56 | Section Index - Fuel System |
| Electrical | 57-270 | Section Index - Electrical, Removal and Installation of Starter and Alternator, Electrical Specifications and Troubleshooting, Batteries, Information and Diagnostic Center |
| Steering | 271-330 | Section Index - Steering, Removal and Installation of Steering Components, Steering Specifications, Pressure Checks, And Troubleshooting, Steering Control Valve |
| Power Train | 331-524 | Section Index - Power Train, Removal and Installation of Power Train Components, Transmission Specifications, Pressure Checks, And Troubleshooting, Transmission, Front Axle |
| Brakes | 525-554 | Section Index - Brakes, Removal and Installation of Brake Components, Hydraulic Brake Troubleshooting, Brake Accumulators, Parking Brake |
| Hydraulics | 555-670 | Section Index - Hydraulics, Removal and Installation of Hydraulic Components, Hydraulic Specifications, Troubleshooting, And Pressure Checks, Cleaning the Hydraulic System |
| Mounted Equipment | 671-762 | Section Index - Mounted Equipment, Air Conditioning Troubleshooting and System Checks for Systems with HFC-134a Refrigerant, Air Conditioner System Service |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil filter replacement value | new oil filter | p. 44 |
| Hydraulic filter replacement value | USE CASE FILTER | p. 18 |
| Transmission oil filter replacement value | USE CASE FILTER | p. 18 |
| Air cleaner elements replacement value | USE CASE FILTERS | p. 18 |
| Hydraulic oil type for 2000-hour change | Case AKCELA Hy-Tran Ultra® | p. 15 |
| Engine oil type for 500-hour change | Case AKCELA No. 1 engine oil | p. 15 |
| Replacement value for Ride Control Accumulator seals | new seals | p. 661 |
| Procedure to release hydraulic pressure before opening reservoir | Pump the brake repeatedly to be sure the brake accumulators have no hydraulic pressure, then move the loader control lever back and forth several times to release any hydraulic pressure in the pilot control circuit. Loosen the filler cap on the reservoir to release the air pressure in the hydraulic reservoir. | p. 559 |
| Troubleshooting step for sluggish bucket lifting (cylinder not moving) | The loader control valve is damaged. See Section 8005 and repair the loader control valve or See Section 8005. Disassemble the loader control valve and check for worn or damaged parts. | p. 598 |
| Engine Oil Capacity with Filter Change | 14.2 liters | p. 15 |
| Fuel Tank Capacity | 246 liters | p. 15 |
| Hydraulic Reservoir Refill Capacity with Filter Change | 123 liters | p. 15 |
