Model HR-300


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The HR-300 high-rise component jack features Gray’s patented head design and 2-stage lifting method to provide an effective and safe method for handling truck/trailer components.

U.S. Patent #6,189,864,B1

SKU: model-hr-300 Categories: ,
  • Foot pedal controls allow hands-free operation
  • Gray manufactured adapters
  • 2-stage design
  • Made in the U.S.A.
Model HR-300
US Units Metric
Capacity 300 lbs 136.08 kg
Minimum Start Height 40″ 101.6 cm
Maximum Lift Height 80 1/2″ 204.47 cm
Power 1st Stage: Air  –  2nd Stage: Hydraulic 1st Stage: Air – 2nd Stage: Hydraulic
Head Rotation 360° 360°
Width 41″ 104.14 cm
Length 41″ 104.14 cm
Supplied Spline Shaft 2″ 5.08 cm
Swivel Caster Diameter 4″ 10.16 cm
Required Air Pressure 100 – 160 PSI 6.9 – 11 Bar
Shipping Weight 105 lbs 47.63 kg


The HR-300 high-rise component jack features Gray’s 2-stage design creating speed of lift with 100% air operation and the precision of hydraulics.  The patented head design rotates 360 degrees and folds back to allow easy removal of components.  The HR-300 can be purchased with optional adapters to help with flywheel removal and installation, and refrigerated trailer jobs such as compressor replacement, batter replacement and turns replacing a remote evaporator into a one technician job.

Additional information

Weight 125 oz


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