John Deere 450K Dozer – Hydrostatic Mid-Size Crawler

Description:

The John Deere 450K Dozer, produced from 2016 through the early 2020s, is a Tier 4 Final hydrostatic crawler built for efficient grading, clearing, and slope work. Powered by an 80–85 HP turbocharged diesel engine with SmartGrade™ 3D grade control options, the 450K combines smooth HST performance with low-effort blade operation. With its compact footprint and advanced controls, it's ideal for contractors demanding precision and low maintenance.

Key Specifications:

• Engine:
  John Deere PowerTech™ 4045H, 4-cylinder, 4.5L, Tier 4 Final

• Horsepower:
  80–85 HP (net)

• Transmission:
  Hydrostatic, dual-path, infinite speed control

• Hydraulics:
  Load-sensing, ~17 GPM

• Operating Weight:
  ~17,500 – 18,500 lbs (standard vs. LGP)

• Blade Type:
  6-Way PAT (Power-Angle-Tilt)

• Blade Capacity:
  ~1.6 cubic yards

• Undercarriage:
  Sealed and lubricated (SALT), standard or LGP track options

• Grade Control:
  Optional SmartGrade™ 3D integrated system

Serial Number Info:

• Production Start: 2016

• Serial Number Location:
  Left side of the frame, near the operator platform or track housing. Always verify the serial number before ordering parts.

Key Features:

• ✅ Tier 4 Final Turbo Diesel:
  Cleaner emissions and fuel efficiency without sacrificing power.

• ✅ SmartGrade™-Ready:
  Integrated 2D/3D grade control options improve accuracy and reduce rework.

• ✅ Hydrostatic Drive:
  Twin-path HST system gives smooth directional changes and hill-holding.

• ✅ Operator Comfort:
  Quiet cab with low-effort joystick controls, digital display, and optional climate control.

• ✅ Easy Maintenance:
  Swing-out coolers and grouped service points reduce downtime.

Common Replacement Parts:

Available from Broken Tractor

• Engine Parts: Turbochargers, filters, water pumps, injectors

• HST Components: Pumps, motors, pressure sensors, relief valves

• Hydraulics: Blade cylinders, hoses, seal kits, joystick control valves

• Undercarriage: Chains, sprockets, idlers, adjusters, LGP track shoes

• Blade Parts: Cutting edges, pins, bushings, tilt cylinders

• Electronics: SmartGrade sensors, monitors, wiring harnesses

Maintenance Schedule:

• Engine Oil & Filter: Every 250 hours

• Fuel Filters: Every 250 hours

• Hydraulic & HST Fluid: Every 500 hours

• Coolant System Flush: Every 1,000 hours

• Grease Points (Blade & Track): Weekly

• Electronic Diagnostics (SmartGrade): As needed or via JDLink alerts

Common Issues & Fixes:

• Drifting Blade or Weak Lift:
  Worn cylinder seals — repair with hydraulic seal kits.

• HST Slipping or Hesitation:
  Common in high-hour machines — inspect and replace hydrostatic pumps or motors.

• SmartGrade Fault Codes:
  Often caused by sensor wiring or calibration issues — check connections and replace damaged components.

• Track Noise or Looseness:
  Worn or stretched chains — solve with undercarriage rebuild kits.