Dewalt 851439 O-ring Replacement Seal

Product Description

The DEWALT 851439 is a replacement O-ring designed for use in DEWALT power tools and equipment. O-rings serve as precision seals that prevent fluid or air leakage at joints, fittings, and moving components. This part maintains system pressure and protects internal mechanisms from contamination. Licensed technicians and experienced service professionals install this type of component during routine maintenance or after identifying a compromised seal during inspection. Proper fitment and material compatibility are critical to long-term sealing performance.

The DEWALT 851439 O-ring is intended for service and repair applications where the original seal has worn, cracked, or lost its ability to hold pressure. It is suited for use in professional tool repair shops and field service environments where DEWALT equipment is maintained to OEM standards. Consult the applicable DEWALT service manual to confirm this part number corresponds to the specific assembly requiring replacement before ordering.

Key Features

• OEM-style replacement seal for DEWALT power tools and accessories
• Maintains pressure integrity and prevents fluid or air leakage at sealing points
• Designed to restore equipment to factory sealing specifications
• Direct replacement reduces downtime during tool service

Compatibility

Designed as an OEM-style replacement O-ring for DEWALT power tools and accessories. Verify fitment against the applicable DEWALT parts diagram before installation.

Installation Notes

O-ring replacement should be performed by a qualified technician familiar with the specific DEWALT tool assembly. Disconnect and de-energize the tool completely before disassembly. Inspect the seating groove for damage or debris before installing the new O-ring, and apply a compatible lubricant to the ring as specified in the service documentation. Follow all applicable service procedures outlined in the manufacturer service manual.

Technical Specifications

• Part Type: O-Ring Seal

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: 851439