John Deere 850L Dozer – Tier 4 Final High-Horsepower Crawler

Description:

The John Deere 850L Dozer, introduced in 2020, is one of Deere’s most powerful and productive crawler tractors, designed for large-scale earthmoving, grading, and slope work. Featuring a 9.0L Tier 4 Final diesel engine, powerful hydrostatic drive, and a redesigned cab with advanced tech, the 850L delivers unmatched pushing power, visibility, and precision.

Key Specifications:

• Engine:
  John Deere PowerTech™ 9.0L Tier 4 Final Turbo Diesel

• Horsepower:
  225 HP (net)

• Transmission:
  Dual-path Hydrostatic (HST)

• Hydraulics:
  Load-sensing, ~58 GPM

• Operating Weight:
  ~47,000 – 50,000 lbs (standard vs. LGP)

• Blade Type:
  6-Way PAT or Semi-U

• Blade Capacity:
  Up to 7.7 cubic yards

• Undercarriage:
  Dura-Trax™ SALT system, optional LGP configuration

Serial Number Info:

• Production Start: 2020

• Serial Number Location:
  Left side of the frame, near the cab step or track pivot. Always confirm before ordering parts.

Key Features:

• ✅ 225 HP 9.0L PowerTech Engine:
  Delivers class-leading torque and pushing performance with Tier 4 Final compliance.

• ✅ Hydrostatic Power Management:
  Automatically adjusts torque and speed under load for smoother operation.

• ✅ Redesigned Cab & Visibility:
  Wider glass, sloped hood, and ergonomic controls improve operator awareness and comfort.

• ✅ SmartGrade™ Ready (Optional):
  Fully integrated 3D machine control system with no masts or cables needed.

• ✅ Serviceability First:
  Ground-level access to filters, coolers, and diagnostics through swing-out compartments.

Common Replacement Parts:

Find all components at Broken Tractor

• Engine: Turbochargers, injectors, DEF sensors, cooling modules

• Hydrostatic System: HST pumps, motors, pressure sensors, electronic controllers

• Hydraulics: Blade lift/tilt cylinders, hoses, valves, joystick controls

• Undercarriage: Track chains, rollers, idlers, recoil springs, LGP shoes

• Blade & Frame: Cutting edges, push arms, blade pins and bushings

• Electronics: Monitors, JDLink™ modules, SmartGrade sensors

Maintenance Schedule:

• Engine Oil & Filter: Every 250 hours

• Fuel Filters & Water Separator: Every 250 hours

• Hydraulic/HST Fluid: Every 500 hours

• DEF System & Cooling Check: Every 500 hours

• Track Tension & Blade Greasing: Weekly

• JDLink/SmartGrade Diagnostics: As needed

Common Issues & Fixes:

• Hydraulic Drift or Blade Response Lag:
  Replace blade control valves or cylinders – seal kits and assemblies available

• DEF Sensor Failures:
  Common Tier 4 issue – shop replacement sensors and SCR parts

• Track Wear or Noise:
  Restore traction with undercarriage kits

• HST Warning or Power Drop:
  Address with diagnostic scan and replace worn HST components