What Is a Grapple Saw?

Sennebogen 728M: The Land Clearing Machine That Outworks a Ground Crew 10-to-1

A forestry tree handler is a purpose-built mobile machine — like the Sennebogen 728M — that fells, cuts, and moves timber with a grapple saw from a single-operator cab, replacing chainsaw crews. SENNEBOGEN 728M grapple saw grasp-cut-move in one motion, hydraulic-driven, mounted to the 728M's dedicated auxiliary circuit. Used 2023 SENNEBOGEN 728M forestry tree handler

Most land clearing operations still rely on a combination of chainsaw crews, skid steers, and sheer manpower. That approach is slow, expensive, and puts people in the path of falling timber. The Sennebogen 728M Wheel Processor Harvester changes the math entirely. One operator. Up to 75 ft of vertical reach. A purpose-built hydraulic system that handles grapple saws, mulchers, and felling grapples without breaking a sweat. This guide covers everything you need to know about the 728M — what it does, where it excels, who it's built for, and what to check before you buy one.

Key Takeaways

• The Sennebogen 728M delivers up to 65 ft of horizontal reach (75 ft vertical) from a single-operator mobile platform weighing 88,818 lbs
• Powered by a Cummins B6.7 173 HP Tier 4 Final engine with dual hydraulic circuits and a dedicated attachment circuit
• The steering wheel control option — rare in North America — keeps hydraulic flow continuous during operations, a meaningful advantage over joystick-only machines
• Compatible attachments include grapple saws, mulchers, rootstock cutters, felling grapples, and trimmers — all swappable via a quick-change adapter
• Experienced arborists report up to 10 times the production output compared to traditional climbing and ground-crew methods (according to SENNEBOGEN NA)
• This specific unit is one-owner, 1,252 hours, located in Andover, NJ — available now through IronMart Online

What Is the Sennebogen 728M?

The Sennebogen 728M is the mobile-undercarriage variant of SENNEBOGEN's 728 E-Series tree care handler. It sits in the middle of SENNEBOGEN's three-machine tree care lineup — above the 718 E (43 ft reach) and below the 738 E (75 ft reach / 225 HP) — making it the most versatile option for contractors who need serious reach without the transport complexity of a heavier machine.

The "M" designation means mobile: pneumatic forestry tires, a 4-point outrigger support system, and the ability to self-load onto most standard low-boy trailers. Unlike tracked crawlers, the 728M can travel between job sites on public roads without special permits or waivers in most states — a practical advantage when you're running multiple contracts across a wide area.

This is not a repurposed excavator with forestry attachments bolted on. SENNEBOGEN engineered the 728M from the ground up for tree care, land clearing, and right-of-way maintenance. Every system — hydraulics, boom geometry, cab position, cooling — was designed around the demands of high-volume timber work.

Sennebogen 728M Specifications

The telescopic stick deserves attention. It extends and retracts continuously under load at the push of a button — no stopping, no repositioning the machine. That capability directly translates to faster cycle times when you're working through timber at volume.

What Makes the Sennebogen 728M Different From Standard Excavators?

This comes up often from buyers who already run excavators on their land clearing jobs. Here is the practical difference.

A standard excavator adapted for forestry work has one hydraulic circuit. Add a high-demand attachment like a grapple saw or mulcher, and you're pulling from the same circuit that drives the boom, stick, and slew. Attachment performance suffers. Cycle times slow. Operators compensate by being less aggressive with the arm — which defeats the purpose.

The 728M runs a separate, dedicated auxiliary hydraulic circuit for attachments. The boom, stick, and slew operate on their own circuits. The attachment gets full, consistent hydraulic flow regardless of what the rest of the machine is doing. That is the core engineering difference, and it is the reason the 728M can run a heavy grapple saw at full performance throughout an entire shift.

The second differentiator is the Maxcab. Standard excavator cabs sit fixed at machine level. The 728M's cab elevates up to 8.8 ft and tilts 30 degrees, giving the operator a direct line of sight into the cutting zone. You're not guessing where the saw is relative to the limb — you can see it. That precision reduces damage to surrounding vegetation, speeds up cuts, and eliminates the guesswork that causes accidents during precision felling.

Third: the boom geometry. The 728M's compact boom and telescoping stick combination is optimized for vertical reach on large-diameter trees — not horizontal digging. Reach up to 75 ft vertically means the machine can dismantle trees up to 125 ft tall from a stationary ground position. A standard excavator, even a large one, cannot do that safely or efficiently.

What Is the Steering Wheel Control Option — and Why Does It Matter?

The unit available through IronMart is equipped with a hydraulic steering wheel — one of very few 728M machines in the United States configured this way.

Here is why that matters. On a joystick-controlled machine, every time the operator uses the joystick for travel or positioning, hydraulic flow is diverted away from the attachment circuit. Continuous operation — cutting, repositioning, cutting again — requires switching between inputs. There is an inherent pause, however brief, in the work cycle.

The steering wheel option decouples machine travel from the attachment circuit. The operator steers with the wheel while the hydraulic attachment continues operating. No interruption. No flow diversion. In high-volume clearing work, that continuous operation adds up fast — more cuts per hour, fewer micro-stops, and less operator fatigue across a full shift.

For any contractor running this machine on production clearing contracts — right-of-way work, utility corridor maintenance, large-scale land development — the steering wheel configuration is a genuine operational advantage, not a preference detail.

Sennebogen 728M Applications: Where This Machine Works

Forestry Harvesting

The 728M was designed around fuel wood harvesting and commercial timber operations. The grapple saw attachment grasps, cuts, and repositions logs in one movement. Combined with the telescoping stick, an experienced operator can process a stand of trees at a pace that traditional ground crews cannot match. SENNEBOGEN NA reports that tree care handlers in this class can achieve up to 10 times the production of traditional climbing and ground-crew methods.

Land Clearing and Site Preparation

Development clearing, subdivision prep, pipeline corridors — the 728M handles them all. The quick-change adapter lets operators swap between a felling grapple for bulk clearing and a mulcher for brush and secondary growth, without changing machines. One machine, one operator, full site from standing timber to cleared ground.

Right-of-Way and Utility Corridor Maintenance

This is where the 728M's reach and road-legal mobility combine most effectively. Utility companies and municipal contractors use this machine specifically because it can work along active roadways with minimal traffic disruption. The compact transport width (9.8 ft) and road-legal mobile undercarriage mean it can be repositioned along a corridor quickly. The 65 ft horizontal reach means it can clear trees from the road surface without positioning equipment in the lane.

Problem Tree Removal and Emergency Response

Hazardous tree removal — storm damage, diseased timber, trees threatening structures — requires precision that chainsaws and cranes cannot always provide. The elevating Maxcab gives operators the sight lines needed for controlled, directed felling. The cab is protected by full steel grids and bulletproof glass side windows and windscreens. The operator is enclosed and protected; there is no ground crew in the drop zone.

After major storm events, SENNEBOGEN tree care handlers have been deployed for emergency railroad and highway clearance specifically because they can remove large volumes of windthrow without requiring ground personnel in the hazard zone.

Embankment and Slope Maintenance

The 4-point outrigger support and forestry tires allow stable operation on grades and uneven ground where other machines would not safely work. Slope maintenance along highways and waterways — tasks that would otherwise require expensive specialized equipment or hand labor — fall within the 728M's standard operating envelope.

Sennebogen 728M Attachments: Full Compatibility List

The dedicated auxiliary hydraulic circuit powers all of the following without compromising main machine performance:

• Grapple saw — grasp, cut, and move in one operation; primary attachment for tree felling and timber handling
• Felling grapple — bulk material handling and large-diameter tree felling
• Rootstock cutter — stump removal and root grinding after felling
• Mulcher — brush, secondary growth, and small-diameter wood processing
• Cutting unit — precision trimming and hedgerow work
• Trimmer — embankment vegetation management
• Mower — roadside and overpass vegetation control

All attachments connect via a quick-change adapter. Swapping from a grapple saw to a mulcher is a field-level operation — no shop time, no special tooling required.

How Does the 728M Compare to the 718 and 738 in the SENNEBOGEN Lineup?

Choose the 728M over the 718 when your work consistently involves trees above 60 ft or second-row felling where reach beyond 43 ft is a regular requirement. Choose the 728M over the 738 when transport flexibility matters — the 738 carries significantly more weight and may require permits for road transport that the 728M avoids.

What to Check Before You Buy a Used Sennebogen 728M

Used machinery in this class represents a significant capital commitment. These are the areas that directly affect what you'll spend after purchase.

1. Operating hours vs. application type
Hours alone don't tell the full story. 1,252 hours of right-of-way clearing on stable ground is a different machine than 1,252 hours of slope work in abrasive conditions. Ask where the machine worked and what attachments it ran. The unit available through IronMart is one-owner, 1,252 hours — low for this class — with documented use history.

2. Hydraulic system condition
Request a hydraulic pressure test on all circuits, including the auxiliary attachment circuit. Seal wear, pump output degradation, and valve response are the first indicators of deferred maintenance. Look for hydraulic fluid condition — color, clarity, contamination — and ask for service records on filter changes.

3. Boom and stick wear
Inspect boom pins and bushings for play. Telescoping stick cylinders should extend and retract smoothly under load with no hesitation or drift. Cylinder seals are a maintenance item, but worn boom structure is a repair cost.

4. Maxcab operation
The elevating mechanism should raise and lower smoothly with no binding. Test the full tilt range (0–30 degrees). Cab glass — bulletproof spec — is expensive to replace. Check for impact damage or delamination in the side windows.

5. Tire condition
Forestry tires on the 728M are specialized, load-rated for this machine's operating weight. Replacement cost is significant. Check tread depth and sidewall condition on all four. Look for cuts, punctures, and sidewall bulging from overload events.

6. Attachment compatibility
If you're buying without attachments, confirm the auxiliary hydraulic circuit output specs are compatible with the attachments you plan to run. Flow and pressure requirements vary by attachment manufacturer. Incompatibility here is a hidden cost that appears after purchase.

7. Undercarriage and outrigger pads
Check outrigger cylinder seals for leaks. Inspect pad surface condition — cracked or deformed pads affect machine stability ratings. Outrigger cylinders that drift under load are a safety concern and a hydraulic seal replacement job.

The IronMart unit has been maintained by its original owner, is available for pre-buy inspection, and can be run on-site before purchase. That is the standard we recommend for any machine in this price class.

The Production Case: What the 728M Costs vs. What It Saves

The question most buyers are really asking is not "what does it cost?" — it's "what does it pay back?"

A traditional tree felling operation on a right-of-way project might run four to six crew members: climbers, ground handlers, a skid steer operator, and a supervisor managing safety. Labor costs, workers' compensation exposure, equipment staging time, and the pace limitation of manual work all combine into a cost structure that scales poorly with project size.

The 728M runs with one operator. Dan Mayer, President of Mayer Tree Service in Essex, MA, described his SENNEBOGEN tree care handler as a machine that outpaces local competition "by a 10:1 clip — but it's probably actually greater than that, because there is no operator fatigue. With the purpose-built equipment, you're just not beating up on your people."

Fewer crew members in the cutting zone also means fewer workers' compensation incidents, fewer OSHA exposures, and lower insurance risk on high-hazard tree work. The machine doesn't get tired at hour six. It doesn't slow down in bad weather. Its production curve stays flat across a shift in a way that hand crews simply can't match.

The IronMart 728M: Unit-Specific Details

This specific Sennebogen 728M is currently available through IronMart Online in Andover, NJ.

• Year: 2023
• Hours: 1,252
• Engine: Cummins B6.7, 173 HP, Tier 4 Final
• Weight: 77,839 lbs (as-configured operating weight)
• Control system: Hydraulic steering wheel — one of very few in the US
• Condition: One-owner, excellent
• Location: Andover, NJ
• Applications run: Tree care, forestry, land clearing

The machine is sold as-is, consistent with standard heavy equipment industry practice. Pre-buy inspection is strongly encouraged and fully supported. If you want to run it before you commit, that can be arranged.

The Right Machine Doesn't Just Clear Land — It Builds Your Business Case

The 728M is not the cheapest way to clear trees. It is the fastest, safest, and most scalable. If your business is bidding land clearing contracts, utility corridor work, or municipal tree maintenance, the production math changes when you're running this machine instead of a ground crew. The Sennebogen 728M produces up to 10x the output of a traditional ground crew.

At 1,252 hours on a 2023 machine with a one-owner history and a rare steering wheel hydraulic configuration, this unit represents the kind of buying opportunity that doesn't sit for long.

Call Jay at 973-886-3020. See it in Andover, NJ.

Frequently Asked Questions About the Sennebogen 728M

What is the Sennebogen 728M used for?

The Sennebogen 728M is used for forestry harvesting, land clearing, right-of-way maintenance, problem tree removal, embankment maintenance, and storm damage clearing. It is a purpose-built tree care handler designed to fell, process, and handle large timber with one operator.

How much does a Sennebogen 728M weigh?

The maximum operating weight of the Sennebogen 728M (728 E-Series mobile) is 88,818 lbs (40,372 kg). The specific unit available through IronMart Online weighs 77,839 lbs in its current as-configured state.

What engine does the Sennebogen 728M use?

The Sennebogen 728M is powered by a Cummins B6.7 engine producing 173 HP (129 kW). It is Tier 4 Final / Stage V compliant.

How far can the Sennebogen 728M reach?

The 728M has a maximum horizontal reach of 65 ft (20 m). With the telescoping stick fully extended, it achieves up to 75 ft (23 m) of vertical reach and can safely dismantle trees up to 125 ft (38 m) tall from a stationary ground position.

What attachments are compatible with the Sennebogen 728M?

The 728M is compatible with grapple saws, felling grapples, rootstock cutters, mulchers, cutting units, trimmers, and mowers. All attachments connect via a quick-change adapter and are powered by the machine's dedicated auxiliary hydraulic circuit.

What is the difference between the 728M mobile and 728 R-HD crawler?

The 728M uses a mobile undercarriage with pneumatic forestry tires. It can self-load onto standard low-boy trailers and travel on public roads without special permits in most states. The 728 R-HD uses a tracked crawler undercarriage suited for steep, unstable, or highly abrasive terrain where wheeled operation is not practical.

Can one operator run the Sennebogen 728M?

Yes. The 728M is specifically engineered for single-operator use. The elevating Maxcab provides full sight lines into the cutting zone, eliminating the need for ground spotters in most applications. This is one of the machine's primary labor cost advantages over traditional tree felling methods.

What is the advantage of the steering wheel option on the Sennebogen 728M?

The steering wheel option allows the operator to control machine travel independently from the attachment hydraulic circuit. This means the grapple saw or other attachment can continue operating while the machine repositions — eliminating the hydraulic flow interruption that occurs with joystick-only controls. In production land clearing, continuous hydraulic operation translates directly into faster cycle times and higher output per shift.

How does the Sennebogen 728M compare to using a chainsaw crew for land clearing?

According to SENNEBOGEN NA, tree care handlers in this class can achieve up to 10 times the production output of traditional climbing and ground-crew methods. Beyond raw production speed, the 728M eliminates crew members from the active cutting zone, reducing workers' compensation exposure and OSHA risk on high-hazard tree work.