Case 621B and 721B Loaders Service Manual PDF

This service manual is the complete factory edition and contains service procedures for the 621B and 721B Case loaders.  In this service manual, you will find detailed step-by-step instructions, illustrations, specifications, and diagrams to overhaul different systems and parts of this equipment.

Case service manual includes maintenance, disassembling and assembling, adjustment, tune-up, operation, inspecting, diagnostic, troubleshooting and other. The manual is divided into different sections. Each section covers a specific component and system with detailed illustrations (see below contents).

View the service manual on your computer or print off detailed information to repair your loader to the manufacturer’s standards.  This manual in PDF format and you can do all this alone. This high-quality indexed pages on English with function search. Only you need the installing the program Adobe PDF Reader for view quality and correct information and schemes. You can search, print, and view on any devices like computers, laptops, tablets, and smartphones.

If you have any questions regarding the content or working with this manual, please contact us. We will provide you with after-sales service support and answer all your questions.

Models:
621B
721B

CONTENTS:

• 1. General
  • Loctite Product Chart
  • Standard Torque Specifications
  • Fluids and Lubricants
• 2. Engines
  • Engine Removal and Installation and Radiator Removal and Installation - 621B
  • Engine Removal and Installation and Radiator Removal and Installation - 721B
  • Stall Teste
  • - 621B 6T-590 Engine
  • Specification Details
  • Cylinder Head and Valve Train
  • Cylinder Block - Crankshaft, Pistons, Rods, Sleeves, Camshaft,
  • Bearings, Seals, and Flywheel
  • Lubrication System
  • Cooling System
  • Turbocharger
  • - 721B 6T-830 Engine
  • Specification Details
  • Cylinder Head and Valve Train
  • Cylinder Block - Crankshaft, Pistons, Rods, Sleeves, Camshaft,
  • Bearings, Seals, and Flywheel
  • Lubrication System
  • Cooling System
  • Turbocharger
  • Turbocharger Failure Analysis
• 3. Fuel System
  • - 621B 6T-590 Engine
  • Fuel System and Filters
  • Fuel Injection Pump Drive Gear
  • Fuel Injectors
  • - 721B 6T-830 Engine
  • Fuel System and Filters
  • Fuel Injection Pump Drive Gear
  • Fuel Injectors
• 4. Electrical
  • Removal and Installation of Starter and Alternator
  • Electrical Schematics, Troubleshooting and Using Booster Batteries to Start the Engine
  • Electrical Schematics and Troubleshooting - Using with Auto shift Transmission
  • Starter and Starter Solenoid - Nippondenso - 621B
  • Starter and Starter Solenoid - Nippondenso - 721B
  • Batteries
  • Instrument Cluster and Gauges
  • 65 Ampere Alternator - Bosch
• 5. Steering
  • Removal and Installation of Steering Components
  • Steering Specifications and Troubleshooting
  • Steering Control Valve
  • Flow Control Valve
  • Steering Cylinder
  • Center Pivot
  • Auxiliary Steering Motor and Pump
• 6. Power Train
  • Removal and Installation of Power train Components
  • Transmission Specifications, Schematic and Troubleshooting - Units without Auto-Shift Transmission
  • Transmission Specifications, Schematic and Troubleshooting - Units with Auto-Shift transmission
  • Transmission repair - 621B (4WG150)
  • Transmission repair - 721B (4WG180)
  • Front and Rear Axle repair
  • Driveshaft, central bearing, and universal joints
  • Wheels and Tires
  • Transmission control valve - unit without auto shift transmission
  • Transmission control valve - unit with auto-shift transmission
• 7. Brakes
  • Removal and installation of brake components
  • Hydraulic Brake Troubleshooting
  • Brake pump
  • Brake Accumulators
  • Brake Actuator valve
  • Brake Accumulator Valve
  • Parking brake
• 8. Hydraulics
  • Removal and installation of hydraulic components
  • Hydraulic specifications, schematics, troubleshooting, and pressure checks
  • Cleaning the hydraulic system
  • Hydraulic pump
  • Loader control valve
  • Cylinder
  • Coupler lock valve - XT loader
  • Remote control valves
  • Pressure reducing/sequence valve
• 9. Chassis
  • Air Conditioning Troubleshooting and System Checks
  • Air Conditioner System Service - Refrigerant Recovery,
  • System Evacuation and Recharging
  • Removal and Installation of Air Conditioning Components
  • Air Conditioning Compressor and Clutch
  • Loader
  • Seat and Seat Belts
  • Pedals and Levers