Joy 4LD loader


Joy 4LD

  • Rated load capacity of 4,000 kg (8,800 lbs.)
  • Largest operator compartment in its class
  • Ideal for narrow vein applications
  • Mechanical drive
  • Designed for ground-level maintenance with no climbing
  • Collet-style pins for lower wear and reduced maintenance

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The 4LD hard rock loader is a diesel-powered heavy-duty machine intended for the most demanding mine environments. The 4LD is designed for small narrow-vein applications where maneuvering space is limited. The 4LD, like all Joy underground mining loaders, is designed specifically for ease of use and maintenance, with simple operation gauges and a rugged long-life structure, providing the lowest possible total costs of operation including low capital costs.

Designed for safe operation and maintenance

The 4LD includes multiple features that are designed to maximize safety for both the operator and the maintenance staff:

  • ROPS/FOPS open cabins and enclosed cabins provide protection from falling rock or rollovers
  • Fail-safe braking system features a spring-applied braking system that activates when low hydraulic oil pressure or electrical failures are detected
  • Operation interlocks prevent accidental machine activation
  • Three-point mounting and anti-slip steps minimize slips and falls
  • Hot components isolation to prevent burns or risk of fires

Designed for reliability

The 4LD has been designed for reliability and long component life, including the following features:

  • Rugged steel frame designed to withstand rigors and punishment typical of the hard rock mining environment
  • MIL (military specification) components that meet international standards
  • Heavy-duty all-mechanical powertrain featuring Dana components for a rugged platform and long service life
  • Hydraulic systems with piston pumps
  • Severe-duty electrical system
  • Collet-style pins for lower wear and reduced maintenance

Designed for ease of maintenance

The 4LD includes several key features that reduce maintenance times and costs, including:

  • Ground-level maintenance design to eliminate climbing
  • Sight glasses remove need to open hoods or covers
  • Centralized lubrication system
  • Simple mechanical design

Designed for productivity

The 4LD has been designed to provide the highest possible productivity in its class:

  • First LHD of this class to feature a Z-bar linkage bucket that optimize bucket cycle time and breakout forces.     
  • Combines power and efficiency to provide fast tramming speeds and cycle times, with impressive breakout power
  • Easy-to-use controls are simple to train and simple to operate
  • Rugged structures and heavy-duty components increase equipment uptime

Designed for customization

The 4LD has many options available, including:

  • 2.2 m3 (2.9 cu yd) bucket
  • Ejector bucket - 1.4 m3 (1.8 cu yd)
  • Enclosed cabin with air conditioning and/or heater
  • Fire suppression system (manual, automatic)
  • Quick attach system (bucket, forks)
  • Radio remote control
  • Arctic package (-40C)
  • Spare rim/wheel


Tramming capacity 4,000 kg 8,800 lbs.
Hydraulic breakout force lift 11,361 kg 25,046 lbs.
Breakout force Mechanical 9,189 kg
20,258 lbs.
Bucket 1.9 m3 2.5 yd3

Overall dimensions

Height to top of canopy 2,053 mm 80.8 in.
Tramming length 7,649 mm 301.1 in. 
Length: rear axle to bumper 2,413 mm 95 in.
Center hinge to rear axle 1,270 mm 4 ft. 2 in.
Center hinge to front axle 1,323 mm 52.1 in.
Reach 1,413 mm 55.6 in.
Height to top of hood 1,561 mm 61.5 in.
Height: ground clearance 260 mm 10.2 in.
Height: dump clearance 1,340 mm 52.8 in.
Height: bucket pin 2,506 mm 98.7 in.
Height: bucket raised 3,936 mm 155 in.
Width overall 1,778mm 70 in.
Maximum width RF 1,575 mm 62 in.
Outside radius 5,213 mm R 205.2 in.
Inside radius 2,937 mm R 115.6 in.
Turn angle 40 degrees
Dump angle 41 degrees
Roll back angle 45 degrees