This special grommet is an original part which is specially designed for use with DeWALT and Porter Cable staplers and nailers. It is utilized to secure the pin that holds the adjuster. This is a high-quality replacement for a damaged or a missing grommet that was installed on a new unit. To ensure the correct location and application of this part, refer to the appropriate diagrams of your model. It is made of durable rubber and is sold individually. You may need pliers to remove and secure the grommet with the pin.
Grommet 391814-00
OEM part for: DeWALT
Part Number: 391814-00
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Compatibility
This Grommet will fit the following 138 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
DeWALT
Show More Compatible ModelsThis item works with the following types of products:
- Nailer Parts
This part replaces obsolete part #: 391814-C3D1
Repair Videos ?
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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.
Wouldn't fire just a slight pop of air from trigger.
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Small hammer, punch, air, QTips, tool oil.
Remove trigger and punch the two pins for the trigger assembly out from either side the the shorter pin is on the bottom.
Remove trigger assembly by applying light air to hose fitting and the assembly will pop out quickly. Use a hook to pull out remaining housing of assembly that will be left behind. Hook air hose to gun to remove any trash inside gun housing then remove air hose and clean trigger assembly housing with a QTip to remove excess oil or trash. Lubricate trigger assembly O Rings with gun oil or Vaseline and press assembly in with fingers until seated. Install the two roll pins using the punch with short pin on bottom long pin on top. Finally install the trigger back into place using the punch to help line up for the pin to be inserted correctly on the first or second try. Slip the tiny grommet onto pin on the round grooved side of pin hole. Lightly oil gun and works like new again. This took maybe 20 minutes at most from getting the tools to putting them back up. 28$ worth of parts saved from spending 160$ on a new nail gun.
No fire when trigger pulled
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Pin punch
Nomar pad was gone and the heat in Florida rotted the grommets. One if the pins then fell out.
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, None. This repair was so simple. I only needed my hands.
Grommets split
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Punch
Parts Used
2. Remove old grommet.
3. push pin back in.
4. install grommet over pin.
Would not fire nails
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Nutdriver, allen wrench
Parts Used
trigger fell out
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, hands
Dewalt coil nailer would not feed nails
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Allen wrenches
Nailgun would not fire, air leaked
Tool Type
Nailer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Punch, hammer
2.Used punch to remove trigger pin and 2 spring pins holding valve in place.
3. Old trigger came right out, but had to use needle nose pliers to pull out valve. Came out in 2 parts, inner valve spring also popped out to my surprise.
4. Fitting new in took a few tries, schematic helped to show orientation.
5. Back together no problem.
6. To do O rings, opened back of gun and plunger came right out. O ring change there just off-on.
7. Used 2x4 as stop to bang gun body hard to release inner workings.
8. First O ring was easy to access and find on schematic, but ring was VERY gummy, more gum than solid, scrapped off and easy replacement. But what grease to use??? None included with 2 O rings purchased, recommended grease listed for $63 for 3 oz.!!??!! Use silicone instead, but could not find any assistance on this!!!
9 Second O ring much harder to access. Had to remove spring and retainer, spring stop and slide back part. This O ring also all gum and noted 3rd O ring also gum. Had to order 3rd and now waiting for delivery. Job not done, but did reassemble, just not tighten screws.
Porter Cable Brad Nailer
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Punch
2. It was very helpful to read the probable causes of the tool symptom which persuaded me to purchase the trigger valve assembly.
3. I removed the 3 pins that hold the trigger assembly and removed the assembly. The bottom plastic seat had separated from the main assembly so I removed that with a very small screw driver.
4. Slid the new assembly in and pinned. Take your time to ensure the pin holes are lined up when replacing.
5. Replaced the grommet. This was the hardest part of the job. They are very hard and tight. Had to put a drop of oil to get it to slide into place.
6. Gun worked like new.
Air blowing by trigger
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Hammer, punch and a dental pick
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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.
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