Introduction
This manual provides essential information for the PORTER-CABLE 903754 Overhaul Kit. This kit is a genuine OEM replacement part designed to restore optimal performance to compatible PORTER-CABLE brad nailers and staplers by replacing worn internal components.
Included Components: The 903754 Overhaul Kit typically includes a comprehensive set of O-rings, seals, and gaskets (specifically OVERHAUL KIT 60078 & 60001) necessary for a complete internal refurbishment of your tool. A small amount of lubricant may also be included.

Image: An assortment of O-rings, seals, and gaskets included in the Porter Cable 903754 Nailer Overhaul Kit, essential for tool maintenance.
Compatibility
This overhaul kit is compatible with the following PORTER-CABLE models:
- BN125 Type 1 1 1/4IN NAILER
- BN200 Type 1 2IN NAILER
- J-NS100 Type 1 1IN NC STAPLER
- NS100 Type 1
- NS200 W/0BATTRY
- NS150 Type 1 1 NC STAPLER
Important Note: Always consult your specific tool's owner's manual or an exploded parts diagram to confirm compatibility and proper part identification before attempting any installation. Variations within model types may exist.
Setup and Installation
Proper installation of the overhaul kit is crucial for tool performance and safety. Follow these general steps, always referring to your specific tool's service manual for detailed instructions.
- Safety First: Disconnect the nailer or stapler from its air supply or power source before beginning any work. Wear appropriate personal protective equipment, including safety glasses.
- Preparation: Clear a clean, well-lit workspace. Gather necessary tools such as screwdrivers, wrenches, and a small pick tool (often helpful for O-ring removal/installation).
- Disassembly: Carefully disassemble your tool according to its specific service manual. Pay close attention to the order and orientation of all existing components, especially springs, washers, and O-rings. Taking photos during disassembly can be helpful.
- Component Replacement: Remove all old, worn, or damaged O-rings, seals, and gaskets. Clean the internal surfaces thoroughly. Replace them with the new components from the 903754 kit. Apply a thin, even layer of the provided or manufacturer-recommended lubricant to each new O-ring before installation. This ensures proper sealing and prevents damage during assembly.
- Reassembly: Reassemble the tool in reverse order of disassembly. Ensure all parts are correctly seated and aligned. Tighten all fasteners to the manufacturer's specified torque settings.
- Testing: After reassembly, connect the tool to an air supply and perform a functional test. Check for any air leaks and ensure the tool operates smoothly and correctly before putting it into service.
Maintenance
Regular maintenance using genuine replacement parts like the 903754 Overhaul Kit extends the life and efficiency of your PORTER-CABLE tool.
- Periodic Inspection: Routinely inspect your tool's internal components for signs of wear, cracking, or hardening of O-rings and seals.
- Lubrication: Use only lubricants specifically designed for pneumatic tools. Incorrect lubricants can damage seals and internal components.
- Storage: Store your tool in a clean, dry environment when not in use.
Troubleshooting
If you encounter issues after installing the overhaul kit, consider the following:
- Persistent Air Leaks:
- Re-check all installed O-rings and seals for proper seating, damage, or incorrect size.
- Ensure all housing screws are tightened evenly and to the correct torque.
- Verify that the correct O-rings were used for each specific location as per the tool's diagram.
- Tool Malfunction (e.g., not firing, weak firing):
- Confirm that all internal components, especially springs and valves, are installed in the correct order and orientation.
- Ensure no debris or foreign objects are obstructing internal mechanisms.
- Refer to your tool's exploded parts diagram for precise component placement.
If problems persist, it is recommended to consult a qualified service technician or contact PORTER-CABLE customer support.
Specifications
| Specification | Detail |
|---|---|
| Model Number | 903754 |
| Part Number | 903754 |
| Item Weight | 1.28 ounces |
| Product Dimensions | 0.98 x 0.98 x 0.98 inches |
| Item Package Quantity | 1 |
| Manufacturer | Stanley Black&Decker |
| Date First Available | November 28, 2012 |
Warranty and Support
This 903754 Overhaul Kit is a genuine PORTER-CABLE replacement part. For specific warranty information regarding the kit or your power tool, please refer to the original product documentation that came with your tool or contact PORTER-CABLE customer support directly.
- Return Policy: A 30-day return policy typically applies for unused and undamaged kits. Please verify the specific return policy with your retailer at the time of purchase.
- Extended Protection: Extended protection plans (e.g., 3-Year or 4-Year plans) may be available for your power tool. These plans are separate from the overhaul kit and should be purchased for the tool itself.
- Customer Support: For technical assistance, parts inquiries, or further support, please visit the official PORTER-CABLE website or contact their customer service department.
Safety Information
Always adhere to general safety practices when working with power tools and their components:
- Disconnect Power: Always disconnect the tool from its air supply or power source before performing any maintenance, repairs, or installing parts.
- Personal Protective Equipment (PPE): Wear appropriate PPE, including safety glasses, to protect against potential hazards.
- Work Area: Ensure your work area is clean, well-lit, and free from distractions.
- Read Manuals: Always read and understand the original owner's manual for your power tool before attempting any repairs or maintenance.





