Case 688 Excavator - Specs & Serial Number Guide

Description:

Serial Number Location

To identify the exact year of manufacture and ensure part compatibility for your Case 688 Excavator, check for the serial number in these locations:

• Stamped on the frame near the base of the boom (left side)

• Inside the cab, typically on the data plate near the operator’s seat or control console

Serial number verification is important for matching engine components, hydraulic specs, and undercarriage parts.

Key Specifications

Key Features

• ✅ Powerful Turbocharged Diesel Engine – The Case 6T-590 delivers reliable torque and excellent fuel efficiency

• ✅ High-Flow Hydraulics – Provides smooth, fast response for digging and lifting

• ✅ Long-Reach Capability – With 21.7 ft digging depth, ideal for deep trenches and site development

• ✅ Reinforced Steel Undercarriage – Engineered for stability and rugged terrain performance

• ✅ Comfortable Operator Environment – Ergonomic controls, wide visibility, and low vibration cab

Maintenance & Common Issues

Routine Maintenance

• Engine Oil & Filters – Replace every 250 hours

• Hydraulic Filter & Fluid – Change every 500 hours

• Swing Bearing & Gear Grease – Monthly, or more under high use

• Track Chain Tension & Rollers – Weekly checks

• Cooling System Cleaning – Monthly in dusty environments

⚠️ Common Issues & Solutions

• Swing Drift or Lag – Inspect rotary valve and swing motor seals – shop swing kits

• Hydraulic Creep – Repack boom and arm cylinders or replace worn spool valves

• Track Slap or Noise – Check tensioners and roller assemblies

• Hard Starting Engine – Clean injectors, test glow plugs and fuel pressure – view engine parts