Front left studio view of GR78B Rock Grapple on 331 P-Tier Skid Steer
No items found.
new
John Deere
GR78B
Attachments

John Deere GR78B Rock Grapple

Starting at

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
Question text goes here

Answer text goes here

Hydraulics
Cylinder Bore Diameter

63.5 mm

Cylinder Bore Diameter

2.5 in.

Cylinder Rod Diameter

35.6 mm

Cylinder Rod Diameter

1.4 in.

Cylinder Stroke

205.7 mm

Cylinder Stroke

8.1 in.

Maximum Operating Pressure

24131.7 kPa

Maximum Operating Pressure

3500 psi

Dimensions
Weight

553.4 kg

Weight

1220 lb.

Bucket Width

1981.2 mm

Bucket Width

78 in.

Grapple Arm Width

619.8 mm

Grapple Arm Width

24.4 in.

Grapple Width

1658.6 mm

Grapple Width

65.3 in.

Bucket Depth Length

838.2 mm

Bucket Depth Length

33 in.

Grapple Closed Length

1033.8 mm

Grapple Closed Length

40.7 in.

Grapple Opened Length

1059.2 mm

Grapple Opened Length

41.7 in.

Grapple Closed Height

828 mm

Grapple Closed Height

32.6 in.

Grapple Opened Height

1168.4 mm

Grapple Opened Height

46 in.

Grapple Opening (Tine Tip)

950 mm

Grapple Opening (Tine Tip)

37.4 in.

Grapple Opening (Grapple Closed)

459.7 mm

Grapple Opening (Grapple Closed)

18.1 in.

Grapple Opening (Grapple Opened)

1036.3 mm

Grapple Opening (Grapple Opened)

40.8 in.

Pivot Pin Diameter

34.9 mm

Pivot Pin Diameter

1.375 in.

Options
Bolt-On Side Plates

Yes

Vehicle Compatibility
Hydraulic Connection

12.7-mm (0.5 in) quick-connect couplers

Compact Track Loaders

325G, 331G, 333G

Skid Steer Loaders

320G, 324G, 330G, 332G