Greenlee 639 Right Angle Twin Yoke Sheave - Reconditioned - 639
Strong welded steel yokes
Forged steel closure type hook with 1" opening
5" wide aluminum alloy sheave with self-lubricating bearings
Yokes rotate independently to fit various setups
Right-Angle Twin Yoke Sheave 4,000 pound capacity
9-13/16" Minimum radius capacity
For Cable pulling
Use with any cable puller whose maximum pulling force is 4,000 pounds or less
What our Experts Think
Q&A
Q: What is the Greenlee 639 Right Angle Twin Yoke Sheave used for?
A: The Greenlee 639 Right Angle Twin Yoke Sheave is used to guide and support cable during pulling operations where a 90-degree directional change is required.
Q: What type of cable work is it designed for?
A: It is used in electrical, utility, and industrial cable pulling applications, especially in conduit and trench installations.
Q: What does a twin yoke sheave do?
A: It provides stable cable guidance at right angles while reducing friction and preventing cable damage during pulling.
Q: Is this unit new or reconditioned?
A: This listing is for a reconditioned unit that has been inspected and restored to working condition.
Q: What are the benefits of using a sheave system?
A: It improves cable control, reduces pulling tension, and helps prevent abrasion or insulation damage.
Q: Is it suitable for field use?
A: Yes, it is designed for rugged job site conditions in professional electrical and utility work.
Q: Does it require power to operate?
A: No, it is a mechanical system that operates without electricity or hydraulics.
Q: Why choose a reconditioned Greenlee 639?
A: It offers reliable performance at a lower cost while maintaining safe and functional operation after refurbishment.
Maintenance Tips
- Inspect sheave wheels before each use for cracks, wear, or flat spots
- Ensure both sheaves rotate smoothly without binding or unusual noise
- Clean grooves regularly to remove dirt, grease, and cable residue
- Lubricate bearings lightly to maintain consistent rotation performance
- Check yoke frame and hardware for bends, cracks, or loose fasteners
- Tighten all bolts, pins, and locking components before operation
- Verify alignment of twin sheaves for proper right-angle cable guidance
- Do not exceed rated load or cable pulling capacity
- Inspect hook or attachment point for deformation or wear
- Keep unit dry to prevent rust and corrosion, especially on reconditioned parts
- Remove debris that could damage cable insulation during pulling
- Store in a clean, dry location when not in use
- Replace worn bearings or sheaves promptly for safe operation
Damage 
Loss 
Theft 
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