JBM - Model 3935 RBH - Stump Grinder
From Stump Grinder
Fully Hydraulic Stump Grinder on Crawler Track with Professional Equipment. Professional, fully hydraulic stump grinder for landscapers, gardening companies, and rental stations. Ease of use through remote control or – alternatively – through stationary control. Ideal machine for small to medium jobs or work with extremely limited access. Compact design with small machine dimensions. Machine width only 79 cm. Good off-road capabilities thanks to hydraulic traction drive as crawler track or wheel chassis. Smallest JBM stump grinder with gasoline engine as fully hydraulic machine. Extremely large swivel range. Weight approx. 900 kg.
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Highlights
- Stump grinder with high-torque 2-cylinder Briggs & Stratton engine with 35 hp (26 kW)
- Fully hydraulic drive of all swivel, lifting, and traction drives as well as of the grinding wheel
- Large swivel range of 145 cm so that even large trunks can be ground without moving the machine
- Large vertical operating range: 50 cm below ground level and 50 cm above ground level
- Large grinding wheel 450 x 15 mm
- Hydraulic crawler track or – alternatively – fully hydraulic wheel chassis (optional with dual tires)
- Robust construction with extremely low center of gravity thanks to center engine concept
- High grinding capacity due to segment grinding wheel with 24 grinding blades
- Special cutting teeth ensure high grinding capacities and long service life
- Transport lugs for secure fastening
- Operator safety system with integrated dead-man switch for machines with remote control as well as for machines with stationary control
- Chain guard against stone chipping
- Easy maintenance thanks to well accessible lubrication points and maintenance points of the drive motor
- Small machine width of 79 cm only
- Machine dimensions L x W x H: 270 x 79 x 120 cm
- Machine weight: approx. 900 kg
At a Glance
Drive
- Briggs & Stratton gasoline engine 35 hp (26 kW)
- Decoupling of drive engine from vertical grinding arm movement
- Drive engine at maximum distance from the grinding area
Operation and ergonomics
- All swivel, grinding, and driving functions are operated via a remote control with integrated safety control functions (EMERGENCY STOP)
- Alternative operation of all swivel, grinding and driving functions via stationary control block and dead-man switch for grinding wheel drive
- Unique vibration-free operation thanks to slip-resistant hand rest
Chassis and frame
- Hydraulic wheel drive with differential and lowering brake valve for safe transport on sloping ground
- Tires with knobby profile
- Increased stability due to wheel track widening
- Stable crawler track with high torque
- Telescopic crawler track
- Low center of gravity of the machine due to center engine concept
- Small machine width of 79 cm
- Transport lugs
Swivel system
- Horizontal swiveling via large hydraulic cylinder with very large swiveling range of 145 cm
- Ball bearing mounted turntable in heavy-duty design for implementation of the horizontal swivel movement
- Vertical swiveling via large hydraulic cylinder with optimum geometrical steering for continuous grinding
- Stable, widely spaced bearing points to absorb vertical and horizontal forces
- Grinding height above ground level 50 cm
- Grinding depth below ground level 50 cm
- Extremely stable grinding due to low center of gravity of the machine and balanced weight distribution of engine and fluids in the tanks
- The vertical swivel movement of the grinding arm is decoupled from the engine
Grinding arm
- Robust grinding arm construction
- Widely spaced bearing points with over-dimensioned bearings provide a durable, very rigid construction
- Control via large hydraulic cylinder with optimum geometric steering position and results in high rigidity during grinding. Possible vibrations and sudden grinding wheel movements are avoided
- Small grinding width based on the v-belt drive with hydraulic motor on top allows optimum view on the grinding area
- Large pulleys for a powerful and durable drive
- Grinding wheel drive via hydraulic motor, which can be electro-hydraulically activated
Grinding wheel and cutting blades
- Stable blade mounting system
- Stable grinding wheel made of high-tensile steel, grinding wheel diameter Ø 450 x 15 mm
- Segment grinding wheel with increased cutting capacity
- Quality cutting blades made of wear-resistant holders and 24 carbide metal (Widea) cutting teeth
Control and hydraulic system
- All swivel, driving, and grinding functions are operated via a remote control with proportional valve technology
- Integrated safety control functions (EMERGENCY STOP) in machines with remote control
- As alternative to the remote control, in machine with stationary control, the swivel and driving functions are operated via a swivelable hydraulic control block
- Electro-hydraulic activation of the grinding function
- Integration of dead-man switch in machines with stationary control as well as in machines with remote control
- Filling level indicator for hydraulic oil
Maintenance and service
- Good access to the cutting system for adjustments and replacements
- Good access to all engine maintenance points
- Well accessible lubrication points
- Belt tensioning via quick-tensioning system
Safety
- Design according to the GS standard
- Pressurized hydraulic hoses with burst protection
- Reinforced steel housing in the area of the grinding wheel
- Integrated safety control functions (EMERGENCY STOP) in machines with remote control
- Dead-man switch (EMERGENCY STOP) for grinding wheel drive with stationary control
- Chain guard against stone chipping in the area of the grinding wheel to prevent escaping material
- Personal protection curtain for machines with stationary control
- Quality with extremely high breakage resistance
- Hinged spray protection wall, 3 pieces, 1 meter each
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