1. Introduction
The Greenlee 39261 Flexible Mandrel is a specialized tool designed for preparing ducts before cable installation. It effectively clears obstructions and ensures the duct is ready for cable pulling. Its flexible design allows it to navigate tight bends within the duct system.
This manual provides essential information for the safe and efficient use, maintenance, and troubleshooting of your Greenlee 39261 Flexible Mandrel.
2. Safety Information
Always observe basic safety precautions when using any tools. Failure to follow these instructions may result in injury or damage to the equipment.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure the cable puller and associated equipment are in good working condition before use.
- Do not exceed the maximum pulling force of 2,000 pounds.
- Inspect the mandrel for any damage before each use. Do not use a damaged mandrel.
- Keep hands and loose clothing clear of moving parts during operation.
- Use only for its intended purpose: clearing and sizing 3-inch ducts for cable pulling.
3. Product Overview
The Greenlee 39261 Flexible Mandrel consists of multiple polyurethane discs connected to form a flexible body. This design allows the mandrel to articulate and pass through bends in a duct system without causing damage to the duct walls.
Figure 1: Greenlee 39261 Flexible Mandrel. This image shows the multi-segmented design of the mandrel, highlighting its flexible nature and the eyelets at both ends for attachment to a cable puller.
Key Features:
- Flexible Design: Articulated discs allow navigation through tight bends.
- Duct Protection: Polyurethane discs prevent scratching or damage to the inner duct walls.
- Dual-Directional Pulling: Tapered profile and eyelets on both ends allow pulling from either direction.
- Obstruction Clearing: Efficiently clears mud, dirt, and light debris.
- Duct Sizing: Ensures the duct is clear and correctly sized for 3-inch cable.
4. Setup
- Inspect Duct: Before using the mandrel, visually inspect the duct entry point for any large, obvious obstructions.
- Inspect Mandrel: Check the Greenlee 39261 mandrel for any signs of wear, cuts, or damage to the polyurethane discs or the connecting cable. Ensure the pulling eyelets are secure.
- Attach Pulling Line: Securely attach a suitable pulling line or rope to one of the mandrel's eyelets. Ensure the connection is strong enough to withstand the expected pulling force.
- Prepare Cable Puller: Set up your cable puller according to its manufacturer's instructions. Ensure it is properly anchored and ready for operation.
5. Operating Instructions
The Greenlee 39261 Flexible Mandrel is used to clear and prove the integrity of 3-inch ducts prior to cable installation.
- Insert Mandrel: Carefully insert the mandrel into the duct opening.
- Initiate Pull: Begin pulling the mandrel through the duct using the cable puller. Operate the puller at a steady, controlled speed.
- Monitor Progress: Observe the pulling force and the mandrel's progress. The flexible design allows it to navigate bends, clearing mud, dirt, and light obstructions.
- Address Resistance: If significant resistance is encountered, stop the pulling operation immediately. Do not exceed the 2,000-pound pulling force limit. Attempt to determine the cause of the obstruction. It may be necessary to pull the mandrel back and re-attempt, or investigate the duct for severe blockages.
- Complete Pull: Continue pulling until the mandrel exits the duct at the other end.
- Remove Mandrel: Disconnect the pulling line and remove the mandrel from the duct.
The successful passage of the mandrel indicates that the duct is clear and ready for cable installation.
6. Maintenance
- Cleaning: After each use, clean the mandrel thoroughly to remove any mud, dirt, or debris. Use water and a mild detergent if necessary. Rinse completely and allow to air dry.
- Inspection: Regularly inspect the polyurethane discs and the connecting elements for wear, cracks, or damage. Pay close attention to the pulling eyelets for signs of fatigue.
- Storage: Store the mandrel in a clean, dry place, away from direct sunlight and extreme temperatures. Avoid storing it in a way that could cause kinks or permanent deformation.
- Replacement: Replace the mandrel if any significant damage is observed, as a compromised mandrel may fail during operation or damage the duct.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mandrel stops or encounters high resistance. | Severe obstruction in the duct (e.g., large rock, collapsed section). | Stop pulling immediately. Attempt to pull the mandrel back. If unable to retrieve, further investigation of the duct is required to identify and remove the obstruction. Do not force the pull. |
| Mandrel appears damaged after use. | Excessive force applied, sharp edges in duct, or material fatigue. | Inspect for specific damage. If significant, replace the mandrel. Review operating procedures to ensure proper use and avoid exceeding force limits. |
| Mandrel does not clear all debris. | Very sticky mud or compacted debris. | Perform multiple passes. Consider using a duct brush or other cleaning tools before the mandrel for heavily soiled ducts. |
8. Specifications
| Model Number | 39261 |
| Brand | Greenlee |
| Duct Size Compatibility | 3 inches |
| Maximum Disk Diameter | 2.8 inches |
| Material | Polyurethane |
| Maximum Pulling Force | 2,000 pounds |
| Product Dimensions | 20.32 x 20.32 x 20.32 cm (approx. 8 x 8 x 8 inches) |
| Item Weight | 680.39 g (approx. 1.5 lbs) |
9. Warranty and Support
Warranty and support information for the Greenlee 39261 Flexible Mandrel is not available in the provided product data. Please refer to the official Greenlee website or contact Greenlee customer service for detailed warranty terms and support options.
For further assistance, please contact your local Greenlee distributor or visit www.greenlee.com.
