Case 621B, 721B Loader Service Manual

Original price was: $59.99.Current price is: $47.99.

Covers: Case 621B, 721B Loader (All Serial Numbers)
Pages: 1,859
Format: PDF download
File size: 438mb
Compatibility: Windows/Mac/Tablet/Smartphone
Notes: Instant digital download only – no printed copy or CD-ROM media.

The Case 621B and 721B service manual covers comprehensive service, repair and troubleshooting procedures for the wheel loader. This service manual has over 1,800 pages of technical information with illustrations for professional and DIY mechanics. View the service manual on your tablet, smartphone or computer and save time and money on repairs.

Latest edition. Engine repair is included.


General Information

  • Loctite Products
  • Standard Torque Specs
  • Fluids and Lubricants

Engine (6T-590/6T-830)

  • Specifications
  • Cylinder Head and Valve Train
  • Cylinder Block – Crankshaft, Pistons, Rods, Sleeves, Camshaft, Bearings, Seals, Flywheel
  • Lubrication System
  • Cooling System
  • Turbocharger

Fuel System

  • Fuel System and Filters
  • Injection Pump and Drive Gear
  • Fuel Injectors

Electrical System

  • Removal and Installation of Starter Motor
  • Starter and Starter Solenoid – Denso
  • Electrical Wiring Schematics, Troubleshooting
  • Batteries
  • Instrument Cluster and Gauges
  • 65 Amp Alternator – Bosch


  • Removal and Installation of Steering Components
  • Steering Specifications and Troubleshooting
  • Steering Control Valve
  • Flow Control Valve
  • Steering Cylinder
  • Center Pivot
  • Aux. Steering Motor and Pump


  • Removal and Installation of Powertrain Components
  • Transmission Specifications, Schematic and Troubleshooting (With and Without Autoshift Transmission)
  • Transmission Repair – 4WG150/180
  • Axle Repair
  • Driveshaft, Center Bearing and Universal Joints
  • Wheels and Tires
  • Transmission Control Valve


  • Removal and Installation of Brake Components
  • Hydraulic Brake Troubleshooting
  • Brake Pump
  • Brake Accumulators
  • Brake Actuator Valve
  • Brake Accumulator Valve
  • Parking Brake

Hydraulic System

  • Removal and Installation of Hydraulic Components
  • Hydraulic Specifications, Pressure Checks and Troubleshooting
  • Cleaning the Hydraulic System
  • Hydraulic Pump
  • Loader Control Valve
  • Cylinders
  • Remote Control Valves
  • Coupler Lock Valve – XT Loader
  • Pressure Reducing/Sequence Valve


  • Air Conditioning Troubleshooting and System Checks
  • Air Conditioner System Service
  • Removal and Installation of Air Conditioning System Components
  • Air Conditioning Compressor and Clutch
  • Loader
  • ROPS Cab and Canopy
  • Seat and Seat Belts
  • Suspension Seat
  • Pedals and Levers
  • Cab Window Replacement

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SKU: CASE-621B-SM Categories: , Tags: ,

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