Rediscovering the 814 Super Power Slide Excavator with Grey Cab

[MikePhua]

The Forgotten Workhorse of European Earthmoving
The 814 Super Power Slide excavator, often identified by its distinctive grey cab, represents a transitional era in European construction machinery. Built during the late 1980s and early 1990s, this model was designed for versatility in tight urban environments and rural infrastructure projects. Though its exact manufacturer lineage is debated—some attributing it to early JCB collaborations or regional OEMs—the 814 earned a reputation for rugged hydraulic performance and a unique sliding boom mechanism that allowed lateral movement without repositioning the machine.
This “power slide” feature was particularly valuable for trenching alongside walls, curbs, or fences, where conventional swing booms would be limited. Operators could shift the boom left or right within the frame, enabling precise digging and backfilling without rotating the upper structure.
Cab Design and Operator Ergonomics
The grey cab variant of the 814 was more than a cosmetic update. It featured improved visibility, sound insulation, and a simplified control layout. Unlike modern excavators with joystick-controlled pilot hydraulics, the 814 relied on mechanical linkages and direct valve actuation. This gave operators tactile feedback and allowed for field repairs without electronic diagnostics.
Inside the cab:

• Levers controlled boom, dipper, bucket, and slide functions
  
• Foot pedals operated slew and auxiliary hydraulics
  
• Gauges monitored hydraulic pressure, coolant temperature, and fuel levels
  
• A sliding side window improved ventilation and communication
  

While primitive by today’s standards, the cab was considered advanced for its time, especially in comparison to open-station machines still common in Eastern Europe.
Hydraulic System and Powertrain
The 814 was powered by a mid-range diesel engine, typically in the 60–80 hp class, depending on market and year. The hydraulic system used gear-type pumps with flow rates sufficient for simultaneous multi-function operation. Key specifications included:

• Operating weight: ~7,000–8,500 kg
  
• Dig depth: ~4.5 meters
  
• Bucket breakout force: ~45–55 kN
  
• Hydraulic pressure: ~200–220 bar
  

The power slide mechanism was actuated by a dedicated cylinder mounted beneath the boom base, riding on a reinforced steel track. This system required regular greasing and inspection, as debris could jam the slide or damage seals.
Common Maintenance Issues and Solutions
Owners of surviving 814 units often report difficulty sourcing manuals and parts, especially for the slide assembly and cab-specific components. Common issues include:

• Hydraulic drift in the slide cylinder due to worn seals
  
• Electrical faults in the cab lighting and gauge cluster
  
• Rust and fatigue in the boom slide rails
  
• Engine overheating from clogged radiators or failed thermostats
  

Recommended solutions:

• Rebuild slide cylinders using custom seal kits from hydraulic shops
  
• Replace wiring harnesses with marine-grade equivalents
  
• Fabricate slide rails from hardened steel and retrofit grease fittings
  
• Upgrade cooling systems with aftermarket radiators and electric fans
  

In Ireland, one operator restored his 814 by salvaging parts from a similar machine used in a quarry. He fabricated a new slide rail using excavator track pads and replaced the cab glass with laminated panels sourced from agricultural suppliers.
Historical Context and Market Impact
The 814 Super Power Slide was never a mass-market machine, but it filled a niche in European job sites where space was limited and precision was essential. Its design influenced later compact excavators with side-shift booms and offset digging capabilities. While JCB, Liebherr, and Volvo eventually dominated the compact segment, the 814 remains a symbol of mechanical ingenuity and operator-first design.
Though production numbers are scarce, it’s estimated that fewer than 2,000 units were built, with most sold in Ireland, the UK, and parts of Scandinavia. Today, surviving machines are often found in rural yards, small farms, or restoration projects.
Preserving and Operating Vintage Excavators
For those maintaining or restoring an 814:

• Document all hydraulic hose lengths and fittings for future replacement
  
• Use modern synthetic hydraulic fluid to reduce wear and improve cold-start performance
  
• Retrofit LED lighting and backup alarms for safety compliance
  
• Keep a log of maintenance intervals and part sources
  

Operators should also consider scanning or digitizing any manuals they acquire, as original documentation is rare and often incomplete. Sharing these resources with other owners helps preserve the legacy of the machine and supports continued operation.
Conclusion
The 814 Super Power Slide with grey cab is more than a relic—it’s a testament to practical engineering and field-driven innovation. Its lateral boom movement, mechanical controls, and compact footprint made it a favorite among operators who valued control and simplicity. Though parts may be scarce and manuals elusive, the machine’s core design remains serviceable and effective. For those willing to invest in its upkeep, the 814 offers a unique blend of history and functionality that modern machines often overlook.