John Deere 544G and 624G Loaders Comparison

[MikePhua]

John Deere’s 544G and 624G models are popular mid-sized wheel loaders widely regarded for their power, durability, and versatility in construction, agriculture, and material handling industries. Both loaders offer strengths and some commonly reported issues, especially related to electrical shifting and hydraulic controls.
Engine and Power

• The 544G features a John Deere PowerTech PVS 6068 turbocharged diesel engine with a displacement of 6.8 liters, delivering approximately 125 SAE gross horsepower (94 kW) at 2,200 rpm.
  
• The 624G is equipped with a John Deere 6068T turbocharged diesel engine, larger displacement of roughly 6.785 liters, rated at 150 SAE gross horsepower (112 kW) at 2,200 rpm.
  

Both engines include altitude-compensating turbochargers and are designed for fuel efficiency and reliable power output in tough working conditions.
Hydraulics and Transmission

• The 544G’s hydraulic system pumps about 69.5 gallons per minute (263 L/min) at 600 psi (4137 kPa), featuring a loader relief pressure of 2,750 psi.
  
• The 624G steps up with a hydraulic pump flow capable of 80 gallons per minute and loader relief at 2,800 psi, boosting lifting capability.
  
• Transmission systems on both loaders are powershift 4-speed gearboxes fitted with torque converters optimized for smooth shifting and power delivery.
  

Load Capacity and Dimensions

• The 544G has an operating weight near 24,092 lbs (10,926 kg), a fuel tank capacity of about 57.6 gallons (218 L), and max lift capacity at ground level around 24,264 lbs (11,006 kg) with a typical 2.25 cubic yard excavating bucket.
  
• The 624G weighs approximately 29,404 lbs (13,341 kg) with a fuel tank around 65.7 gallons (249 L) and a higher lift capacity near 27,000 lbs (12,247 kg) reflecting its larger bucket capacity and engine power.
  
• Both models have comparable dimensions designed to provide maneuverability in tight work environments with tire sizes approximately 20.5-25.
  

Common Electrical and Control Issues
Several users of the 624G model report electrical problems affecting shifting, bucket level stop, and boom float functions. These malfunctions can cause the machine to only shift gears manually rather than via the automatic shifter, reducing operator convenience.
Dealers usually address these issues before sale through software updates, rewiring, or replacing faulty sensors. Nevertheless, such problems are a concern for prospective buyers seeking trouble-free operation.
Buyers’ Recommendations

• Inspect electrical components related to transmission shift controls and hydraulic system sensors.
  
• Request detailed maintenance history and proof of issue resolution for used loaders.
  
• Consider the 544G if seeking a lighter, simpler machine with fewer electronic controls but possibly less power.
  
• For higher lifting capacities and power, the 624G is suitable but verify the unit’s electronic control system reliability.
  

Operational Experiences
Operators appreciate the responsive controls and solid frame designs of both loaders. One user noted that after dealer repairs on a 624G’s electrical shift issues, the machine operated smoothly with improved hydraulic cylinder responsiveness.
Another buyer preferred the 544G for its straightforward controls and fuel efficiency, although it offers slightly less power than the 624G.
Summary
The John Deere 544G and 624G loaders provide reliable performance with engine sizes and hydraulic capacity tailored for medium-duty loading jobs. The 544G appeals for its simplicity and fuel economy, while the 624G delivers more power and increased capacity but sometimes encounters electrical shifting and hydraulic control issues. Thorough inspection and maintenance records review remain essential when purchasing used models to ensure dependable performance in the field.