Case 621 Loader Service Manual (JAK0021700 & Below)

Covers: Case 621 Loader (Serial/PIN JAK0021700 & Below)
Language: English
Pages: 1,602
Format: PDF
File size: 515mb
Compatibility: Windows/Mac/Tablet/Smartphone

Latest downloadable edition. The Case 621 service manual for serial numbers JAK0021700 and earlier includes comprehensive service/repair instructions, and troubleshooting steps for the wheel loader. This complete service manual has over 1,600 illustrated pages of technical information for mechanics and owners. View the service manual on your tablet, smartphone or computer, and save time and money on repairs.

Machines before PIN JAK0020901 have Clark transmissions. Machines with PIN JAK0020901 to JAK0021700 have ZF transmissions. For the ZF 4WD150 trans. repair, refer to separate manual from the manufacturer.

For 621 loaders with serial numbers JAK0021701 and above, click here.

Topics:

GENERAL INFORMATION

• Standard Torque Specs
• Fluids and Lubricants
• Detailed Engine Specifications

ENGINE

• Engine and Radiator Removal and Installation
• Stall Tests
• Cylinder Head and Valve Train
• Cylinder Block, Pistons, Rods, Camshaft, Main Bearings, Oil Seals, and Flywheel
• Lubrication System
• Cooling System
• Turbocharger

FUEL SYSTEM

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

ELECTRICAL SYSTEM

• Specifications, Schematics, Troubleshooting, and Using Booster
• Batteries to Start the Engine
• Starter and Starter Solenoid – Nippondenso
• 45 or 65 Amp Alternator – Bosch
• Batteries
• Instrument Cluster

STEERING

• Removal and Installation of Steering Components
• Steering Troubleshooting and Pressure Check
• Steering Control Valve
• Flow Control Valve
• Steering Cylinder
• Center Pivot
• Auxiliary Steering Pump, Valve, and Flow Indicator

POWER TRAIN

• Removal and Installation of Components .
• Transmission Specifications and Troubleshooting (Clark)
• Transmission Repair (Clark)
• Differential and Planetary Repair
• Drive Shafts, Center Bearing and Universal Joints
• Wheels and Tires

BRAKES

• Removal and Installation of Brake Components
• Specifications, Schematic, Troubleshooting, Leakage Tests and Adjustments
• Air Compressor and Governor
• Brake Valve
• Brake Actuator
• Pressure Reducing Valve and Pressure Protection Valve
• Parking Brake
• Disc Brakes
• Air Dryer

HYDRAULICS

• Removal and Installation of Components
• Hydraulic Specifications, Schematics, Troubleshooting, and Pressure Checks
• Cleaning the Hydraulic System
• Hydraulic Pump
• Loader Control Valve
• Cylinders
• Remote Control Valves
• Pressure Regulator Valve and Accumulator

CHASSIS

• Air Conditioning Troubleshooting and System Checks
• Discharging and Charging the Air Conditioning System
• Removal and Installation of Air Conditioning Components
• Compressor and Clutch
• Loader
• ROPS Cab and ROPS Canopy
• Seats and Seat Belts
• Suspension Seat
• Pedals and Levers

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