For Case 680CK models (produced from 1966 to 1971), the serial number plate is typically located on the left side of the frame just behind the front loader tower or stamped into the bell housing near the transmission. Always verify your serial number before ordering to ensure compatibility with early and late production units.
Case 680 Serial Numbers by Year
1966: #9100001 – 9101500
1967: #9101501 – 9101800
1968: #9101801+
Key Specifications
Feature
Specification
Years Manufactured
1966 – 1971
Engine Model
Case G188D (4-cylinder diesel)
Net Horsepower
58 HP (43 kW) @ 2,000 rpm
Max Torque
173 lb-ft (235 Nm) @ 1,200 rpm
Displacement
188 cu in (3.1 L)
Transmission Type
4-speed mechanical shuttle or torque converter
Hydraulic Flow Rate
17 – 20 gal/min (64 – 76 L/min)
Hydraulic Pressure
2,200 psi (152 bar)
Operating Weight
Approx. 13,500 lbs (6,123 kg)
Loader Bucket Capacity
1.0 – 1.25 cu yd (0.76 – 0.96 m³)
Backhoe Digging Depth
Up to 14' (4.27 m)
Breakout Force (Loader)
~8,900 lbs (4,037 kg)
Travel Speed (Max)
19.5 mph (31.4 km/h)
Dimensions (L×W×H)
21.8' × 7.1' × 10.1'
Performance & Design Highlights
Rugged Construction King Design
As part of the iconic CK series, the 680CK was known for its dependable mechanical simplicity and rugged field performance.
Versatile Powertrain Options
Offered with either a torque converter drive or mechanical shuttle, the 680CK was designed for flexible jobsite handling and easier gear shifting.
Heavy-Duty Loader Arms & Backhoe
Strong steel loader towers and reinforced backhoe booms made this machine reliable for trenching, lifting, and foundation work.
Simple Controls & Field Serviceability
Minimal electronics and straightforward mechanical systems make the 680CK easy to troubleshoot and repair in remote job sites.
Maintenance & Common Issues
Routine Maintenance
Component
Service Interval
Engine Oil & Filter
Replace every 250 hours
Hydraulic Fluid & Filter
Replace every 1,000 hours
Transmission Fluid
Replace every 1,000 hours
Air Filter
Clean every 250 hours; replace if clogged
Fuel Filter
Replace every 500 hours
Cooling System
Flush and inspect every 1,000 hours
Common Issues & Fixes
Issue
Quick Fix
Loader Arm Creep
Replace worn piston seals in lift cylinders
Torque Converter Slippage
Inspect fluid level; service converter clutch & linkage
Weak Backhoe Controls
inspect control valve and filter blockages
Steering Wheel Play
Replace steering shaft bushings or tie rod ends
Engine Stalling Under Load
Inspect fuel injection timing and fuel filter
Out of Stock
This item is OUT OF STOCK and must be special ordered.
Please call us to check availability.
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Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.
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