Case 680CK, 680CK Series C, 680CK Series E Loader Service Manual

Table of Contents – 680 CK Series C Service Manual

10 SERIES – GENERAL
• General Engine Specifications
• Maintenance and Lubrication
• Torque Chart

20 SERIES – ENGINES
• Cylinder Head and Valves
• Engine Block Assembly
• Water Pump, Thermostats, Oil Cooler, and Filters
• Engine Removal and Stall Checks
• Air Cleaner

30 SERIES – FUEL SYSTEM
• Fuel System and Filters
• Fuel Injection Pumps
• Roosa-Master Fuel Injectors
• Electric Fuel Pump
• Fuel Lines and Throttle Adjustment

40 SERIES – HYDRAULICS
• Hydraulic Diagrams, Trouble Shooting, Pressure Checks
• Hydraulic Pump
• Loader Control Valve
• Case Backhoe Control Valve
• Commercial-Shearing Backhoe Control Valve
• Extendahoe Control Valve
• Stabilizer Lock Valve
• Hydra-Guide
• Boom Lockout Valve and Relief Valve
• Loader and Backhoe Cylinders
NOTE: Also see Sections 9011 and 9012 for exploded views of hydraulic system.

50 SERIES – STEERING
• Hydraulic Diagram, Trouble Shooting, Pressure Check
• Steering Pump
• Steering Valve and Column
• Steering Cylinders
• Front Axle

60 SERIES – POWER TRAIN
• Transmission/Converter Hydraulic Diagram, Operation and Description
• Trouble Shooting and Testing
• Forward-Reverse Transmission (Power Shuttle)
• Four Speed Mechanical Transmission
• Rear Axle
• Drive Shaft

70 SERIES – BRAKES
• Air System Diagrams, Operation, Pressurizing/Depressurizing the Air System, and Trouble Shooting
• Foot Brakes and Slack Adjuster
• Air Compressor, Governor, Reservoir, Moisture Ejection Valve
• Brake Valve
• Brake Actuator
• Parking Brake Control Valve and Quick Release Valve
• Pressure Reducing Valve, Pressure Protection Valve
• Double Check Valve, Clutch Cutout Valve, Stoplight Switch
• Alcohol Evaporator

80 SERIES – ELECTRICAL
• Wiring Diagrams
• Trouble Shooting and Adjustments
• Batteries
• Starter and Starter Solenoid
• Alternator

90 SERIES – MOUNTED EQUIPMENT
• Loader
• Backhoe
• ROPS Cab and Canopy
• Front Floor Plate Assembly

Manual Extract Cylinder Check

a. If checking loader lift cylinders, drive the machine onto blocks that are high enough to completely retract the lift cylinders. Completely retract the lift cylinders and shut off engine. Remove the tube to the closed end of a lift cylinder.
b. If checking the tilt cylinders, completely retract the tilt cylinders and shut off engine. Disconnect the hose at the closed end of one of the cylinders.
c. To check any other cylinder, run cylinder to end of stroke. Shut off engine. Provide supports to prevent collapse of attachment (if required), then disconnect hose or tube on the return side of the cylinder.
d. Start the engine and run at half throttle. Move the control lever into the same position as in step 2a, 2b, or 2c, and hold in place. System pressure will now rise to the setting of the main relief valve. Check for leakage through the open line. Any leakage indicates worn cylinder packing; however, slight leakage is permissible.
e. If leakage is found, remove the defective cylinder and repair. Recheck circuit operation. If the problem is not completely remedied, there is additional leakage in the control valve.