This is an OEM replacement part for DeWALT compressors. The O-ring is designed to fit in between the cylinder head and body to provide an air-tight seal to allow the piston to work properly. The part is made of high-quality material. This item is sold individually.
Oring 5140069-99
OEM part for: DeWALT, Porter Cable
Part Number: 5140069-99
![](/images2/icon-shiptruck.png)
![DeWALT DeWALT](images/1009_white.png)
![Porter Cable Porter Cable](images/129_white.png)
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Frequently Purchased Together ?
Compatibility
This Oring will fit the following 5 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
DeWALT
Porter Cable
This item works with the following types of products:
- Compressor Parts
Questions & Answers ?
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Does this fit my product?Questions & Answers for Oring
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Compressor wouldn't make pressure, only produced 50 psi.
Tool Type
Compressor
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Power Drill, Wrench Set, Adjustable Wrench
Parts Used
2. Separated housing halves & removed electric motor assembly after disconnecting white
electrical leads from electric motor plus green ground wire and air tank fitting at the tank.
3. Exercise care in removal keeping track of the black rubber motor mounts which encompass the motor assembly on all sides. Take note how they fit in place and don't lose them.
4. Pulled cylinder head from the motor utilizing a 5/32" Allen wrench and replaced cylinder
head and the two translucent O-rings; one on each side of the head.
5. Reassembled in reverse order. Used a small zip tie to hold white electrical lead in place
around armature field as the zip tie had to be cut in disassembly.
O rings on piston cylinder leaked air
Tool Type
Compressor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Nutdriver, Adjustable Wrench
Parts Used
Would not build pressure above 30 lbs
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Wrench Set, Allen Wrench
Disconnected the wiring using pliers to pull the quick connects.
Disconnected the storage tank from the compressor using open ended wrench
Pulled the compressor apart using an allen wrench.
Cleaned off the rust with a scotch brite
Replaced defective valve and replaced the o rings
Reasembled.
Wouldn't build over 30 lbs of pressure
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Allen wrench
Reeds broke from moisture in air
Tool Type
Compressor
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set
2. Take off pipe at compressor head
3 Remove valve seat
4 Replace valve seat with new one with o-rings in place
5 Reassemble compressor head and cowling
Runs great now. Just like new
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.