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John Deere GR78B Rock Grapple
Front left studio view of GR78B Rock Grapple on 331 P-Tier Skid Steer
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John Deere
GR78B
New Equipment

John Deere GR78B Rock Grapple

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Key Features

  • Land Clearing
  • Brush Removal Applications
  • Jobsite Clean-Up
  • Material Sifting Tine Spacing
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Features
Specifications
Increased Capacity and Improved Design

The rock grapple features 3-in. (7.6-cm) spaced tines supported on both sides for maximum bend resistance and a serrated cutting edge for penetrating tough ground. Its heavy-duty build includes a solid backplate, thickened components, and wide independent-action grapple arms to handle large, uneven loads efficiently.

Front studio view of a black GR series rock grapple with claws open
Two Independent-Action Grapples

Each unit includes two independent-action grapples that allow for optimal clamping action when grappling objects with non-uniform sizes such as root balls, large rocks, or demolition debris.

Tracked compact loader with a front grapple attachment driving along a narrow dirt path in a wooded area with dense green vegetation
Heavy-Duty Construction for Demanding Applications

Featuring thickened side cutters, side sheets, and backplates, the GR Series Rock Grapple provides unparalleled durability. The increased cylinder size supports high grapple forces, while weld-in serrated edges enhance ground penetration capabilities.

Heavy-Duty Construction for Demanding Applications
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<div class="accordion-wrap"><div class="accordion2_component"><div class="accordion2_top"><div class="text-size-medium text-weight-bold">Hydraulics</div><div class="accordion2_icon w-embed"><svg width="100%" height="100%" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M25.3333 15.667V16.3336C25.3333 16.7018 25.0349 17.0003 24.6667 17.0003H17V24.667C17 25.0351 16.7015 25.3336 16.3333 25.3336H15.6667C15.2985 25.3336 15 25.0351 15 24.667V17.0003H7.3333C6.96511 17.0003 6.66663 16.7018 6.66663 16.3336V15.667C6.66663 15.2988 6.96511 15.0003 7.3333 15.0003H15V7.33365C15 6.96546 15.2985 6.66699 15.6667 6.66699H16.3333C16.7015 6.66699 17 6.96546 17 7.33365V15.0003H24.6667C25.0349 15.0003 25.3333 15.2988 25.3333 15.667Z" fill="currentColor"></path></svg></div></div><div style="width: 1118px; height: 0px;" class="accordion2_bottom"><div class="margin-bottom margin-small"><table class='custom-table-style'><tbody><tr><td><h5>Cylinder Bore Diameter</h5></td><td><p>63.5 mm</p></td></tr><tr><td><h5>Cylinder Bore Diameter</h5></td><td><p>2.5 in.</p></td></tr><tr><td><h5>Cylinder Rod Diameter</h5></td><td><p>35.6 mm</p></td></tr><tr><td><h5>Cylinder Rod Diameter</h5></td><td><p>1.4 in.</p></td></tr><tr><td><h5>Cylinder Stroke</h5></td><td><p>205.7 mm</p></td></tr><tr><td><h5>Cylinder Stroke</h5></td><td><p>8.1 in.</p></td></tr><tr><td><h5>Maximum Operating Pressure</h5></td><td><p>24131.7 kPa</p></td></tr><tr><td><h5>Maximum Operating Pressure</h5></td><td><p>3500 psi</p></td></tr></tbody></table></div></div></div><div class="accordion2_component"><div class="accordion2_top"><div class="text-size-medium text-weight-bold">Dimensions</div><div class="accordion2_icon w-embed"><svg width="100%" height="100%" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M25.3333 15.667V16.3336C25.3333 16.7018 25.0349 17.0003 24.6667 17.0003H17V24.667C17 25.0351 16.7015 25.3336 16.3333 25.3336H15.6667C15.2985 25.3336 15 25.0351 15 24.667V17.0003H7.3333C6.96511 17.0003 6.66663 16.7018 6.66663 16.3336V15.667C6.66663 15.2988 6.96511 15.0003 7.3333 15.0003H15V7.33365C15 6.96546 15.2985 6.66699 15.6667 6.66699H16.3333C16.7015 6.66699 17 6.96546 17 7.33365V15.0003H24.6667C25.0349 15.0003 25.3333 15.2988 25.3333 15.667Z" fill="currentColor"></path></svg></div></div><div style="width: 1118px; height: 0px;" class="accordion2_bottom"><div class="margin-bottom margin-small"><table class='custom-table-style'><tbody><tr><td><h5>Weight</h5></td><td><p>553.4 kg</p></td></tr><tr><td><h5>Weight</h5></td><td><p>1220 lb.</p></td></tr><tr><td><h5>Bucket Width</h5></td><td><p>1981.2 mm</p></td></tr><tr><td><h5>Bucket Width</h5></td><td><p>78 in.</p></td></tr><tr><td><h5>Grapple Arm Width</h5></td><td><p>619.8 mm</p></td></tr><tr><td><h5>Grapple Arm Width</h5></td><td><p>24.4 in.</p></td></tr><tr><td><h5>Grapple Width</h5></td><td><p>1658.6 mm</p></td></tr><tr><td><h5>Grapple Width</h5></td><td><p>65.3 in.</p></td></tr><tr><td><h5>Bucket Depth Length</h5></td><td><p>838.2 mm</p></td></tr><tr><td><h5>Bucket Depth Length</h5></td><td><p>33 in.</p></td></tr><tr><td><h5>Grapple Closed Length</h5></td><td><p>1033.8 mm</p></td></tr><tr><td><h5>Grapple Closed Length</h5></td><td><p>40.7 in.</p></td></tr><tr><td><h5>Grapple Opened Length</h5></td><td><p>1059.2 mm</p></td></tr><tr><td><h5>Grapple Opened Length</h5></td><td><p>41.7 in.</p></td></tr><tr><td><h5>Grapple Closed Height</h5></td><td><p>828 mm</p></td></tr><tr><td><h5>Grapple Closed Height</h5></td><td><p>32.6 in.</p></td></tr><tr><td><h5>Grapple Opened Height</h5></td><td><p>1168.4 mm</p></td></tr><tr><td><h5>Grapple Opened Height</h5></td><td><p>46 in.</p></td></tr><tr><td><h5>Grapple Opening (Tine Tip)</h5></td><td><p>950 mm</p></td></tr><tr><td><h5>Grapple Opening (Tine Tip)</h5></td><td><p>37.4 in.</p></td></tr><tr><td><h5>Grapple Opening (Grapple Closed)</h5></td><td><p>459.7 mm</p></td></tr><tr><td><h5>Grapple Opening (Grapple Closed)</h5></td><td><p>18.1 in.</p></td></tr><tr><td><h5>Grapple Opening (Grapple Opened)</h5></td><td><p>1036.3 mm</p></td></tr><tr><td><h5>Grapple Opening (Grapple Opened)</h5></td><td><p>40.8 in.</p></td></tr><tr><td><h5>Pivot Pin Diameter</h5></td><td><p>34.9 mm</p></td></tr><tr><td><h5>Pivot Pin Diameter</h5></td><td><p>1.375 in.</p></td></tr></tbody></table></div></div></div><div class="accordion2_component"><div class="accordion2_top"><div class="text-size-medium text-weight-bold">Options</div><div class="accordion2_icon w-embed"><svg width="100%" height="100%" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M25.3333 15.667V16.3336C25.3333 16.7018 25.0349 17.0003 24.6667 17.0003H17V24.667C17 25.0351 16.7015 25.3336 16.3333 25.3336H15.6667C15.2985 25.3336 15 25.0351 15 24.667V17.0003H7.3333C6.96511 17.0003 6.66663 16.7018 6.66663 16.3336V15.667C6.66663 15.2988 6.96511 15.0003 7.3333 15.0003H15V7.33365C15 6.96546 15.2985 6.66699 15.6667 6.66699H16.3333C16.7015 6.66699 17 6.96546 17 7.33365V15.0003H24.6667C25.0349 15.0003 25.3333 15.2988 25.3333 15.667Z" fill="currentColor"></path></svg></div></div><div style="width: 1118px; height: 0px;" class="accordion2_bottom"><div class="margin-bottom margin-small"><table class='custom-table-style'><tbody><tr><td><h5>Bolt-On Side Plates</h5></td><td><p>Yes</p></td></tr></tbody></table></div></div></div><div class="accordion2_component"><div class="accordion2_top"><div class="text-size-medium text-weight-bold">Vehicle Compatibility</div><div class="accordion2_icon w-embed"><svg width="100%" height="100%" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M25.3333 15.667V16.3336C25.3333 16.7018 25.0349 17.0003 24.6667 17.0003H17V24.667C17 25.0351 16.7015 25.3336 16.3333 25.3336H15.6667C15.2985 25.3336 15 25.0351 15 24.667V17.0003H7.3333C6.96511 17.0003 6.66663 16.7018 6.66663 16.3336V15.667C6.66663 15.2988 6.96511 15.0003 7.3333 15.0003H15V7.33365C15 6.96546 15.2985 6.66699 15.6667 6.66699H16.3333C16.7015 6.66699 17 6.96546 17 7.33365V15.0003H24.6667C25.0349 15.0003 25.3333 15.2988 25.3333 15.667Z" fill="currentColor"></path></svg></div></div><div style="width: 1118px; height: 0px;" class="accordion2_bottom"><div class="margin-bottom margin-small"><table class='custom-table-style'><tbody><tr><td><h5>Hydraulic Connection</h5></td><td><p>12.7-mm (0.5 in) quick-connect couplers</p></td></tr><tr><td><h5>Compact Track Loaders</h5></td><td><p>325G, 331G, 333G</p></td></tr><tr><td><h5>Skid Steer Loaders</h5></td><td><p>320G, 324G, 330G, 332G</p></td></tr></tbody></table></div></div></div></div>

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