Inside Greenlee 6906A: The Two-Speed Cable Puller Built to Handle Every Pull on the Job

Cable pulling is one of the most time-sensitive phases of a commercial electrical project. When a pull goes wrong, it slows everything downstream. 

A motor that doesn't have enough force to complete a heavy run costs you the pull and the time to reset. A motor that only runs at one speed burns through the light-load pulls slowly when it doesn't need to. Neither situation is acceptable when you're moving through a high-pull-count job and the schedule is tight.

The Greenlee 6906A Mobile VersiBoom II sets up in under two minutes, folds down to fit in a pickup truck, and covers conduit sizes from 2" through 5" with the included adapter weldments. 

For electrical contractors pulling cable on commercial jobs across a range of conduit sizes and pull weights, this combination is designed to keep the crew moving through the pull schedule instead of fighting setup time and puller limitations.

• (1) UT10-2S Ultra Tugger Puller Assembly 
• (1) Mobile VersiBoom II
• (1) 3' Boom
• (1) 4' Boom
• (1) Adapter Weldment, 2" (00563)
• (1) Adapter Weldment, 2-1/2" (00564)
• (1) Adapter Weldment, 3" (00565)
• (1) Adapter Weldment, 3-1/2" (00566)
• (1) Adapter Weldment, 4" (00567)
• (1) Adapter Weldment, 5" (00610)

The Greenlee 6906A is a complete cable pulling package built around the UT10-2S Ultra Tugger, the only two-speed cable puller on the market that shifts from high-speed/low-load to low-speed/high-load pulling with a double-tap of the foot pedal. 

This tugger UT10-2S has a continuous operation capacity of 6,500 lbs, a 15-minute duty cycle rating up to 8,000 lbs, and a momentary peak capacity of 10,000 lbs. The Mobile VersiBoom II positions the puller over the conduit opening and stores the six included adapter weldments on board, covering conduit sizes from 2" to 5" without any separate parts management.

The 6906A packages everything needed to run the UT10-2S from a Mobile VersiBoom II across a full range of commercial conduit sizes. That means:

• No separate boom or adapter purchases to cover the 2" through 5" conduit range
• Two-speed pulling capability across the full 10,000 lb capacity range out of the box
• Sub-two-minute setup on the VersiBoom II from one pull location to the next

Greenlee defines the UT10-2S's core strengths as: Two-Speed Pulling Power, Fast and Flexible Setup, and Operator Control. Those are the design decisions that separate this puller package from single-speed alternatives.

A single-speed cable puller forces a compromise on every job. Run it fast and you have enough speed for light pulls, but the motor is working harder than it needs to and lacks the force for a heavy run. Set it up for heavy pulls and you're pulling light runs slowly. On a job with a mix of short, lightweight pulls and long, heavy conductor runs through loaded conduit, that trade-off shows up in your pull count at the end of the day.

The UT10-2S covers the full range without compromise:

• High speed is the right mode for lighter pulls. No-load speed is 16 FT/MINT, and at loads up to 4,000 lb, the puller maintains 12 FT/MINT. Light-to-medium pulls move through quickly without the motor working at capacity.
• Low speed handles the heavy work. No-load speed is 9 FT/MINT, and the motor can sustain loads up to 8,000 lb continuously at 6 FT/MINT. Momentary peak capacity reaches 10,000 lb for the hardest pulls.

The duty cycle ratings matter in real field use. Continuous operation is rated to 6,500 lb, meaning the UT10-2S can run without interruption on pulls in that range. Pulls between 6,500 and 8,000 lb operate on a 15-minute on / 15-minute off cycle. The 10,000 lb rating is a momentary capacity for the initial force required to break a pull free and get it moving.

The six adapter weldments in the 6906A kit extend that versatility to the conduit side of the job. With adapters covering 2", 2-1/2", 3", 3-1/2", 4", and 5" conduit, the setup handles the range of conduit sizes found across commercial and industrial electrical work from a single tool package.

Not all two-speed claims mean the same thing. Understanding what makes the UT10-2S different requires a look at how the motor manages the relationship between speed and force on a cable pull.

A single-speed motor runs at one fixed combination of pulling speed and torque output. It is designed to a point on the force-speed curve, and it stays there regardless of what the load actually requires. If the rated speed is set for heavy pulling, light pulls run slow. If it's set for speed, the motor struggles under high load.

A two-speed motor separates those operating points. The UT10-2S runs at two distinct speed-torque combinations, and the operator selects between them based on what the pull actually requires:

• High speed mode is optimized for pulls where speed matters more than force. At 12 FT/MINT under load up to 4,000 lb, lighter pulls complete faster, increasing the number of pulls a crew can run in a shift.
• Low speed mode is optimized for force. The motor delivers higher torque at 6 FT/MINT, sustaining pulls up to 8,000 lb and reaching the 10,000 lb momentary peak. On long runs with heavy conductor or high conduit fill, low speed is where the pull gets finished.

Greenlee designed the UT10-2S with a specific efficiency advantage: the two-speed motor delivers stronger pulling power at lower amperage than competitive single-speed alternatives. Lower amperage draw at equivalent pulling force means the motor runs more efficiently under load, which translates directly to longer motor life and greater durability across a high-pull-count workday.

The speed change is handled by the foot pedal, not a separate switch or manual setting. A double-tap of the foot pedal shifts the motor between high and low speed while the operator stays positioned at the pull. No manual reconfiguration, no steps away from the conduit to adjust a control panel.

The pulling setup is only as productive as the positioning system that holds the puller over the conduit. A boom that takes significant time to set up, requires multiple people to position, or needs to be unpacked and reassembled between pulls is a productivity cost on every job it's used on.

The Mobile VersiBoom II was designed to solve those problems. The setup sequence is three steps and takes under two minutes per location:

• Lift the boom to the desired angle using the crank
• Position the elbow to the desired angle
• Position the nose just over the conduit and lower the adapter into the conduit by cranking the boom down

The boom includes both the 3' and 4' boom options in the 6906A kit, giving the crew flexibility on approach angle and reach based on the specific pull location. Boom angle and elbow position are independently adjustable, which means the setup adapts to the entry angle of the conduit without moving the base of the unit.

When the pull is complete, the VersiBoom II folds down in under two minutes to a footprint small enough to load into a pickup truck bed. For crews running multiple pull locations in a day across different floors or buildings, that transport capability is a direct time saver compared to boom setups that require a dedicated vehicle or significant disassembly to move.

The adapter weldments store directly on the VersiBoom II. The six conduit adapters in the 6906A kit -- 2", 2-1/2", 3", 3-1/2", 4", and 5" -- ride on the boom between setups, keeping the adapters with the puller at all times and eliminating the separate case or bag that would otherwise need to travel with the system.

Cable pulling on a commercial job involves managing a real-time relationship between force, speed, and the condition of the pull throughout the run. A puller that doesn't give the operator feedback on what is happening in the conduit puts the conductor and the conduit at risk when pulling force approaches the limit of the system.

The UT10-2S is designed with operator visibility in mind:

• The on-board force gauge provides a continuous visual readout of pulling force during the pull. The operator can see in real time how much force the puller is applying, allowing them to monitor the pull through difficult sections without guessing at what the motor is doing.
• Speed changes are visible through the force gauge display, which communicates both pulling force and speed changes as the motor shifts between modes.
• The foot pedal provides hands-free start, stop, and speed change control. The double-tap motion for speed change keeps both hands free to manage the conductor at the conduit entry while the foot controls the puller.
• The foot pedal is removable for situations where a different control configuration is needed for the specific pull setup
• The sub-two-minute setup time on the VersiBoom II reduces the per-pull preparation time and allows the crew to maintain a consistent pace across a multi-pull schedule without long transitions between locations.

The 6906A packages the UT10-2S with the Mobile VersiBoom II as the standard positioning system. The UT10-2S itself supports two additional mounting configurations for specific job situations.

For pull setups where the conduit entry is at floor level or the specific geometry of the pull location doesn't suit the VersiBoom II positioning range, the UT10-2S can be configured with a floor mount. Floor mounting anchors the puller directly to the floor surface at the pull location, providing a stable base for high-force pulls where the boom approach is not practical

In situations where the puller needs to be anchored to a structural element, a beam, or a conduit rack rather than to the floor or positioned on a boom, the UT10-2S supports chain mounting. Chain mounting is a common approach in cable tray and overhead pulling configurations where the pull geometry requires the puller to be positioned above the floor level of the pull.

Both floor mount and chain mount accessories are available separately. The mounting flexibility of the UT10-2S means the puller in the 6906A kit is not limited to boom-mount applications, and the same motor assembly transitions between mounting configurations as the job demands

The 6906A is a production cable pulling package for electrical contractors on commercial and industrial jobs where pull volume, pull weight variation, and conduit size range all create challenges for a single-speed puller.

• Electrical contractors running commercial and industrial cable pulls across a mix of light and heavy runs, where shifting between high-speed and low-speed modes keeps the pull count up throughout the day
• Crews pulling in conduit sizes from 2" through 5" who need a single package with all the adapters already included rather than sourcing them separately
• Electricians who need a fast-deploying, mobile positioning setup that can transition between pull locations quickly and fit in a pickup truck for transport
• Jobs where the full 10,000 lb momentary peak capacity is required for large conductor or high-fill conduit pulls, while also needing speed on lighter runs
• Foremen looking for a puller setup that gives the operator real-time force feedback to protect the conductor and the conduit on difficult pulls

• Residential or light commercial work where pull weights are consistently low and a smaller, lighter-duty puller covers the range of work
• Operations where the 2" to 5" conduit range does not match the conduit sizes on the job, requiring different adapter sizes outside the included kit
• Jobs where pull locations are fixed and accessible, and a mobile positioning setup does not provide a productivity advantage over a permanent or semi-permanent puller installation

The Greenlee 6906A delivers three practical advantages that add up directly in pull count and labor efficiency:

• The UT10-2S two-speed motor that shifts from 12 ft/min on lighter pulls to full-force low-speed mode for runs up to 10,000 lb with a double-tap of the foot pedal, without reconfiguring the setup between pulls
  
• The Mobile VersiBoom II that sets up in under two minutes, stores all six conduit adapters on-board, and breaks down to fit in a pickup truck, keeping the pace up between pull locations on a multi-pull job day
• The on-board force gauge that gives the operator continuous visual feedback on pulling force and speed, removing the guesswork from high-load pulls near the upper end of the capacity range