Easy
30-60 minutes
This O-ring is compatible with various models of compressors made by DeWALT, Black & Decker, and Bostitch. It is an authentic replacement part from original manufacturer. An O-ring is used to prevent pressure loss between joined rigid parts by creating a seal. Many tools require working O-rings in order to function. Please check that the correct O-ring is being used in the correct position, as many tools use multiple different O-rings throughout. Sold individually.
O-ring A03856
OEM part for: Porter Cable, DeWALT, Black and Decker, Bostitch
Part Number: A03856
$5.19
In Stock
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Compatibility
This part will fit the following 18 machines
DeWALT
D55167 Type 1 Compressor View Diagrams & Manuals
D55168 Type 1 Compressor View Diagrams & Manuals
D55146 Type 1 Compressor View Diagrams & Manuals
D55168 Type 2 200PSI, 15Gal., 120V Electric Compressor View Diagrams & Manuals
D55167 Type 2 200PSI, 15Gal., 120V Electric Compressor View Diagrams & Manuals
D55146 Type 2 4.5 gallon, 200 PSI Hand Carry Compressor View Diagrams & Manuals
D55146 Type 3 Compressor View Diagrams & Manuals
D55167 Type 3 Electric Compressor View Diagrams & Manuals
D55168 Type 3 Electric Compressor View Diagrams & Manuals
D55149 Type 4 Compressor View Diagrams & Manuals
D55168 Type 4 1.8HP 15G Compressor View Diagrams & Manuals
D55168 Type 5 1.8HP 15G Compressor View Diagrams & Manuals
D55146 Type 4 Compressor View Diagrams & Manuals
Black and Decker
919-16760 Type 0 Compressor View Diagrams & Manuals
919-16761 Type 0 Compressor View Diagrams & Manuals
919-16762 Type 0 Compressor View Diagrams & Manuals
919-16763 Type 0 Compressor View Diagrams & Manuals
Bostitch
CAP1645-OF (Type 1) C 4.5G Jb Ehp Of 200Psi B View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Compressor Parts
Repair Videos ?
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O-ring
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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.
Compressor head bolt failure
Matt - February 8, 2023
Tool Type
Compressor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Power Drill, Socket set, Adjustable Wrench, Tap and Die
Parts Used
Disassemble
Drill broken bolts.
Tap aluminum casting to restore threads.
Replace o-rings.
Reassemble.
Test.
Drill broken bolts.
Tap aluminum casting to restore threads.
Replace o-rings.
Reassemble.
Test.
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Head bolt for compressor broke.
James - September 12, 2022
Tool Type
Compressor
Difficulty
Easy
Time
More than 2 hours
Tools Used
Power Drill, Socket set, Nutdriver, Adjustable Wrench
1. Removed head
2. Drill out broke head bolt
3. Replaced valve body with new one and new gaskets
4. Reassembled compressor head using new head bolt
2. Drill out broke head bolt
3. Replaced valve body with new one and new gaskets
4. Reassembled compressor head using new head bolt
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Gasket pinched wouldn’t get up to proper pressure
Robert - May 2, 2020
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Pliers, Power Drill, Socket set, Wrench Set, Nutdriver, None
Parts Used
Removed main cover
Removed casing torque screws
Removed 4 bolts holding compressor body- had to easy out broken bolt
Replaced both gaskets
Put back together and tested pressure
Works like new-$15 with postage saved me buying a new $400 compressor
Removed casing torque screws
Removed 4 bolts holding compressor body- had to easy out broken bolt
Replaced both gaskets
Put back together and tested pressure
Works like new-$15 with postage saved me buying a new $400 compressor
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Loss of air pressure
rudy - February 26, 2020
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set
Replaced piston and sleeve
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moisture had rusted reed valves(intake) on valve plate
JULIAN - April 3, 2019
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Power Drill, Socket set, Adjustable Wrench
disassembled valve plate assembly/ordered parts/cleaned head and replaced valve plate assembly
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Dewalt 200 PSI compressor would not build up pressure. After removing cover noted one of the four head bolts was broken and the o-ring was protruding a bit.
Glenn - October 1, 2017
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Power Drill, Socket set, Torx drivers for cover, cobalt drill bits
Parts Used
1. Removed plastic cover with torx driver bits.
2. Removed head cover by removing the 3 remaining bolts.
3. Drilled out broken bolt.
4. Replaced the two internal o-rings on either side of head cover.
5. Installed head cover using 4 bolts (used loctite to keep bolts from backing out during operation).
6. Re-installed cover.
7. Restarted compressor. No problems.
2. Removed head cover by removing the 3 remaining bolts.
3. Drilled out broken bolt.
4. Replaced the two internal o-rings on either side of head cover.
5. Installed head cover using 4 bolts (used loctite to keep bolts from backing out during operation).
6. Re-installed cover.
7. Restarted compressor. No problems.
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Blown gasket broken bolt
john - July 27, 2017
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Torx bit
Parts Used
Removed the shroud
Removed the broken bolt from the cylinder head
Removed the cylinder head and the valve plate assembly
Removed the old o-ring and installed the new o-ring
Replaced the valve plate assembly
Replaced the cylinder head
Replaced the shroud
Removed the broken bolt from the cylinder head
Removed the cylinder head and the valve plate assembly
Removed the old o-ring and installed the new o-ring
Replaced the valve plate assembly
Replaced the cylinder head
Replaced the shroud
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Head Bolts Broken off
Earl - June 6, 2016
Tool Type
Compressor
Difficulty
Hard
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Drill Bits
Two head bolts were broken off so I had to drill them out and clean up all of the threads in order to put the unit back together, this was the hard part. Once that was done all I had to do was reassemble the unit back together and clean up some wire problems. Then after that did a test run and also found the pressure switch was turned up to full so that the compressor would not shut off yet at 200 lbs, so I turned that down so that the unit would turn off at 160 lbs and on at 120 lbs, then set the regulator to deliver air to the tools at 100 lbs. unit now runs great.
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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.
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