John Deere 748G Grapple Skidder – Parts, Specs & Common Fixes

Description:

The John Deere 748G Grapple Skidder is a heavy-duty forestry machine built for tough skidding jobs in demanding terrain. Known for its torque, traction, and long-lasting durability, the 748G delivers high productivity in timber extraction operations. This model features a powerful engine, responsive hydraulics, and a rugged frame that holds up under extreme loads.

Key Specifications:

• Engine: John Deere 6068T, 6-cylinder turbocharged diesel

• Horsepower: 185 HP gross

• Transmission: Powershift, 6 forward / 3 reverse gears

• Hydraulics: Closed-center, load-sensing system

• Pump Flow: 45 GPM at 2,200 RPM

• Operating Weight: Approx. 38,500 lbs

• Grapple Size: 120 to 140-inch opening range (varies by attachment)

• Axles: Heavy-duty Outboard planetary axles

• Tire Size: 30.5L x 32 standard

Performance & Durability Features:

• Powerful torque for large payloads on steep grades

• Dual-function grapple with strong clamping force for secure load handling

• Enclosed ROPS/FOPS cab with ergonomic controls and heating/AC option

• Articulated steering with 29° articulation angle for tight maneuvering

Maintenance Essentials & Replacement Parts:

• Frequent service items include grapple cylinder seal kits, blade pins and bushings, and brake valve repair kits

• Transmission solenoids and shift cables often wear with heavy use

• Hydraulic filters and engine air filters should be replaced regularly — browse all filters here

• Steering cylinder seals and axle bearing kits are among the most replaced items

Common Issues and Quick Fixes:

• Loss of drive in certain gears: Commonly traced to a failing transmission solenoid or worn clutch pack

• Leaking grapple cylinders: Replace with hydraulic seal kits from Broken Tractor

• Steering sluggish or delayed: Often fixed by rebuilding the steering valve or replacing the orbitrol

• Brake fade or slow release: Typically corrected by servicing the master cylinder or replacing brake discs

Pro Tip:

Locate the 748G serial number on the right-hand frame rail behind the front tire, or on the engine block ID tag. Always verify your serial before ordering parts to ensure exact fit.