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Case 680 CK Backhoe Loader

The Case 680CK is a Construction King series backhoe loader. This model was manufactured from 1966 to 1968. The Case 680 CK is equipped with two types of engines: a 267 cu.in (4.4 L) Case 267D four-cylinder liquid-cooled diesel engine with a max power of 71 hp (53 kW), or 251 cu.in (4.1 L) Case 251G four-cylinder liquid-cooled gasoline engine with a max power of 71 hp (53 kW).

The Power Shuttle transmission consists of a hydraulic clutch, gearbox with 4 forward and 4 reverse gears, and single-stage torque converter. The maximum forward speed - 17 mph (27.2 kph), maximum reverse speed - 21.7 mph (34.1 kph).

The open center hydraulic system includes a direct drive pump with a rated fluid flow of 27 gal/min (102.5 l/min). The hydraulic pressure is 134 bar (1950 psi). The Case 680CK backhoe loader was equipped with 11.0Lx16 or 8.25x15 front tires and 14.9x24 or 16.9x24 rear tires. The wheelbase is 80.5 in (2040 mm).

The front end loader has a lifting capacity (at pivot pin) of 5000 lbs (2270 kg) to 123.5" (3130 mm) full height, and breakout force of 8200 lbs (3725 kg). The bucket dump clearance is 97" (2455 mm) at maximum dump angle of 45 degrees. The raising time is 6 sec from ground level to maximum height, and bucket dump time is 2.1 sec. The loader is compatible with 82" (2070 mm) or 92" (2325 mm) buckets.

The backhoe work ranges consist of a bucket digging force of 11440 lbs (5200 kg), digging depth at max value of 192" (4855 mm), and reach from swing pivot of 228" (5770 mm) at ground level. The backhoe is compatible with 12" (305 mm), 16" (405 mm), 18" (455 mm), 24" (605 mm), 30" (760 mm), or 36" (910 mm) buckets.

Diesel Engine
Engine Model Case 267D
Engine Type 4-Stroke, 4-cylinder liquid-cooled diesel
Number of Cylinders 4
Displacement, cu in (L) 267 (4.40)
Engine Bore, in (mm) 4.13 (105.0)
Engine Stroke, in (mm) 5.00 (127.0)
Aspiration Naturally aspirated
Rated Engine Power, hp (kW) 71.0 (53.0)
Rated Engine Speed, rpm 2000
Maximum Torque, Nm (ft-lb) 278 (205)
Torque Speed, rpm 1300
Compression Ratio 15.0:1
Firing Order 1-3-4-2
Fuel System Injection pump
Governor Type Mechanical, flyweight
Lubricating System Type Positive pressure
Cooling System Type Pressurized
Air Cleaner Dry type
Oil Filter Full flow type
Fuel Tank Capacity, gal (L) 28.0 (106.0)
Electrical System Rating, Volts 12
Charging System Alternator
Alternator Rating, Amps 55

Gasoline Engine
Engine Model Case 251G
Engine Type 4-Stroke, 4-cylinder liquid-cooled diesel
Number of Cylinders 4
Displacement, cu in (L) 251 (4.12)
Engine Bore, in (mm) 4.00 (102.0)
Engine Stroke, in (mm) 5.00 (127.0)
Rated Engine Power, hp (kW) 71.0 (53.0)
Rated Engine Speed, rpm 2000
Maximum Torque, Nm (ft-lb) 274 (203)
Torque Speed, rpm 1300
Compression Ratio 7.5:1
Firing Order 1-3-4-2
Fuel System Up-draft carburetor
Ignition Type Coil and distributor
Governor Type Mechanical, flyweight
Lubricating System Type Positive pressure
Cooling System Type Pressurized
Air Cleaner Dry type
Oil Filter Full flow type
Fuel Tank Capacity, gal (L) 28.0 (106.0)
Electrical System Rating, Volts 12

Transmission
Transmission Type Power Shuttle
Gearbox Type 4F/4R, sliding gear
Number of Forward Gears 4
Number of Reverse Gears 4
Torque Converter Type Single stage
Torque Converter Ratio 2.42:1
Clutch Type Hydraulic
Maximum Forward Speed, mph (kph) 17.0 (27.2)
Maximum Reverse Speed, mph (kph) 21.7 (34.1)

Wheels and Tires
Drive Wheels 2WD 4x2
Steering Configuration Front steer
Steering System Hydrostatic power
Brakes Type Hydraulic disc
Front Tire Size (Std) 11.0Lx16
Rear Tire Size (Std) 14.9x24
Front Tire Size (Opt) 8.25x15
Rear Tire Size (Opt) 16.9x24
Front Tread, in (mm) 70.8 (1790)
Rear Tread, in (mm) 66.3 (1675)

Hydraulic System
Hydraulic System Type Open Center
Hydraulic Pump Type Direct drive, vane
Implement Pump Flow, gpm (Lpm) 27.0 (102.5)
Hydraulic Pressure, Bar (psi) 134 (1950)
Hydraulic Fluid Capacity, gal (L) 17.5 (66.2)
Number of Standard Remote Valves 2/4

Dimensions and Weight
Wheelbase, in (mm) 80.5 (2040)
Length (with Attachments), in (mm) 273 (6905)
Height (Steering Wheel), in (mm) 79 (2000)
Height (Exhaust), in (mm) 95.7 (2430)
Overall Width (with Attachments), in (mm) 81.8 (2070)
Ground Clearance, in (mm) 13.3 (330)
Shipping Weight (Diesel), lb (kg) 12800 (5820)
Shipping Weight (Gas), lb (kg) 12700 (5770)

Front End Loader
Maximum Lift Height (to pin), in (mm) 123.5 (3130)
Clearance, Dumped Bucket, in (mm) 97 (2455)
Dump Reach, in (mm) 34 (860)
Dump Angle, deg 45
Rollback Angle, deg 39
Reach At Ground, in (mm) 68.8 (1740)
Breakout Force (at pin), lb (kg) 8200 (3725)
Lift to Full Height (at pin), lb (kg) 5000 (2270)
Bucket Width (Std), in (mm) 82 (2070)
Bucket Width (Opt), in (mm) 92 (2325)
Lift Cylinder Size, in (mm) 4.0x25.5 (102x645)
Bucket Cylinder Size, in (mm) 2.5x10.8 (64x275)
Raising Time to Full Height, second 6.0
Bucket Dumping Time, second 2.1
Lowering Time, second 3.2

Backhoe
Max Digging Depth (Retracted), in (mm) 168 (4250)
Max Digging Depth (Extended), in (mm) 192 (4855)
Reach from Swing Pivot (Retracted), in (mm) 205.5 (5200)
Reach from Swing Pivot (Extended), in (mm) 228 (5770)
Loading Height (Retracted), in (mm) 122 (3500)
Loading Height (Extended), in (mm) 153 (3880)
Swing Arc, deg 190
Bucket Rotation, deg 157
Loading Reach (Retracted), in (mm) 85 (2150)
Loading Reach (Extended), in (mm) 108.5 (2745)
Digging Force, lb (kg) 11440 (5200)
Bucket Width, in (mm) 12 (305)
Bucket Width, in (mm) 16 (405)
Bucket Width, in (mm) 18 (455)
Bucket Width, in (mm) 24 (605)
Bucket Width, in (mm) 30 (760)
Bucket Width, in (mm) 36 (910)
Boom Cylinder Size, in (mm) 4.5x39.8 (114x1007)
Crowd Cylinder Size, in (mm) 4.5x35.3 (114x894)
Bucket Cylinder Size, in (mm) 4.0x27.3 (102x690)
Swing Cylinder Size, in (mm) 4.0x11 (102x280)
Stabilizer Cylinder Size, in (mm) 3.5x16.4 (88x415)

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