Easy
30-60 minutes
O-rings are made to contain thousands of PSI pressure by creating a seal between two or more parts. O-ring measurements are defined by the inside diameter and the thickness.
rnrnThere are many causes for O-Ring failure. The most common among power tools are:
• Extrusion and Nibbling – The O-ring has ragged, tattered edges. These are commonly caused by pressure spikes which shear off tiny “bites” from the o-ring, or caused by clearance gaps.
• Abrasion – One or both sides of the o-ring appear rough and slightly flattened. Commonly caused by a contact surface that it too rough, contains grit or is too smooth to allow lubrication.
• Over Compression – The O-ring is flattened on both sides and may have a “ring” split along its length. Commonly caused by excessive pressure or heat.
• Heat Hardening – The O-ring has a pitted or cracked surface, and is often flattened on both sides. Caused by temperature exceeding o-ring capacity.
• Weather/Ozone Cracking – The O-ring is covered in small surface cracks. Caused by exposure to ozone, UV rays and air pollution. Excessive seal stretching (greater that 5%) causes similar cracking.
O-ring ACG-45
OEM part for: Porter Cable, DeWALT, DeVilbiss, Black and Decker, Bostitch
Part Number: ACG-45
$4.99
In Stock
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 305 machines
Porter Cable
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PAFTV660V Type 3 Workshop/Auto Compressor View Diagrams & Manuals
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HFB5020VP Type 2 Workshop/Auto Compressor View Diagrams & Manuals
HFB5020VP Type 3 Workshop/Auto Compressor View Diagrams & Manuals
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IRFB5020VP Type 0 Workshop/Auto Compressor View Diagrams & Manuals
IRFB5020VP Type 1 Workshop/Auto Compressor View Diagrams & Manuals
IRFB5020VP Type 2 Workshop/Auto Compressor View Diagrams & Manuals
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100E4D-2 1 Horsepower-Single Cylinder Air Compressor View Diagrams & Manuals
100E8AD-2 1 Horsepower-Single Cylinder Air Compressor View Diagrams & Manuals
100E8AD-3 1 Horsepower-Single Cylinder Air Compressor View Diagrams & Manuals
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RAF3520 (Type 1) A 3.5Hp 20G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAF3520 (Type 2) A 3.5Hp 20G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAF5020 (Type 0) A 5.0Hp 20G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAF5030 (Type 0) A 5.0Hp 30G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB412 (Type 0) A 4.0Hp 12G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB412 (Type 1) A 4.0Hp 12G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB5020 (Type 0) A 5.0Hp 20G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB5020VP (Type 0) A 5.0Hp 20G Vp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB5020VP (Type 1) A 5.0Hp 20G Vp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFB5020VP (Type 2) A 5.0Hp 20G Vp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFBC412 (Type 0) A 4.0Hp 12G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFC18 (Type 4) A 1.0Hp 8G Hp Pl 1Stg 120 Air Compressor View Diagrams & Manuals
RAFC5020 (Type 0) A 5.0Hp 20G Hp Pl 1Stg 12 Air Compressor View Diagrams & Manuals
RAFCTV630 (Type 0) A 6.0Hp 30G Hp Tv 1Stg 24 Air Compressor View Diagrams & Manuals
RAFTV630 (Type 0) A 6.0Hp 30G Hp Tv 1Stg 24 Air Compressor View Diagrams & Manuals
SDS100E3D (Type 1) A 1.0Hp 3G Hd Pl 1Stg 120 Compressor View Diagrams & Manuals
SDS100E4D (Type 0) A 1.0Hp 4G Pc Pl 1Stg 120 Compressor View Diagrams & Manuals
SDS100E4D (Type 1) A 1.0Hp 4G Pc Pl 1Stg 120 Compressor View Diagrams & Manuals
SDS100E4D (Type 2) A 1.0Hp 4G Pc Pl 1Stg 120 Compressor View Diagrams & Manuals
SDS150E4STD (Type 0) A 1.5Hp 4G Ss Um 1Stg 120 Compressor View Diagrams & Manuals
SDS150E4TTD (Type 0) A 1.5Hp 4G Tt Pl 1Stg 120 Compressor View Diagrams & Manuals
SDS150E4TTD (Type 1) A 1.5Hp 4G Tt Pl 1Stg 120 Compressor View Diagrams & Manuals
SDSC100E3D (Type 1) A 1Hp 3G Hd Pl 1stg 120V Compressor View Diagrams & Manuals
SDSC150E4D (Type 0) A 1.5Hp 4G Pc Pl 1Stg 120 Compressor View Diagrams & Manuals
SDSC150E4D (Type 1) A 1.5Hp 4G Pc Pl 1Stg 120 Compressor View Diagrams & Manuals
SDSC150E4TTD (Type 0) A 1.5Hp 4G Tt Pl 1Stg 120 Compressor View Diagrams & Manuals
SDSC150E4TTD (Type 1) A 1.5Hp 4G Tt Pl 1Stg 120 Compressor View Diagrams & Manuals
SFC100E3D (Type 1) A 1.0Hp 3G Hd Pl 1Stg 120 Compressor View Diagrams & Manuals
SFFC420 (Type 0) A 4.0Hp 20G Hp Pl 1Stg 12 Compressor View Diagrams & Manuals
SFFC420 (Type 1) A 4.0Hp 20G Hp Pl 1Stg 12 Compressor View Diagrams & Manuals
T1061PE100-P (Type 0) A 1.0Hp 0G Nt Pl 1Stg 120 Compressor View Diagrams & Manuals
Black and Decker
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919-16561 Type 0 7.0 Horse Power 60 Gallon Compressor View Diagrams & Manuals
919-16561 Type 1 7.0 Horse Power 60 Gallon Compressor View Diagrams & Manuals
919-16561 Type 2 7.0 Horse Power 60 Gallon Compressor View Diagrams & Manuals
919-16561 Type 3 7.0 Horse Power 60 Gallon Compressor View Diagrams & Manuals
919-16670 Type 0 3.5 Horse Power 20 Gallon Compressor View Diagrams & Manuals
919-16670 Type 1 3.5 Horse Power 20 Gallon Compressor View Diagrams & Manuals
919-16728 Type 0 120 Volt Air Compressor View Diagrams & Manuals
919-16728 Type 1 120 Volt Air Compressor View Diagrams & Manuals
919-16732 Type 0 Air Compressor View Diagrams & Manuals
919-16732 Type 1 Air Compressor View Diagrams & Manuals
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
919-16778 Type 0 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-16778 Type 1 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-16778 Type 2 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-16778 Type 3 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-16778 Type 4 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
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919-72432 Type 1 6.0 Horse Power 30 Gallon Compressor View Diagrams & Manuals
919-72432 Type 2 6.0 Horse Power 30 Gallon Compressor View Diagrams & Manuals
919-72550 Type 0 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-72550 Type 1 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-72550 Type 2 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
919-72550 Type 3 3.5 Horse Power 25 Gallon Compressor View Diagrams & Manuals
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Bostitch
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Compressor
I looked for head gaskets for an older air compressor. You had the parts needed, price was fair and delivery was quick. You have my business!
Guest -
August 11, 2020
Verified Purchase
Perfect fit
The part fit my 33 gallon Craftsman compressor perfect.
Dnnis -
August 1, 2020
Verified Purchase
Amazing, before schedule, grate team ( Just perfect ) thanks so much
The parts exactly the same not a single problem
Guest -
March 10, 2020
Verified Purchase
Exact fit
Had seen youtube vids of people repairing their compressors and the oem gaskets ordered from the craftsman website were too big. This one was perfect. Up, running and compressing air. Now my compressor blows. :-)
Guest -
November 23, 2019
Verified Purchase
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t days ago
Verified Purchase
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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
👍 1 of 1 people found this instruction helpful
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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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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The compressor gasket broke
Omar - October 28, 2020
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Nutdriver, Torque Wrench
Removed all 4 bolts. 2 had their head broken off so the top part slid off exposing the shaft.
Used a vise grip to unscrew the broken bolts.
Replaced both gaskets and reassembled with new bolts.
Used a vise grip to unscrew the broken bolts.
Replaced both gaskets and reassembled with new bolts.
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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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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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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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Air leaking from the head
Mark - May 27, 2016
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Removed the four screws holding the head on. The o-ring was cracked and worn. I replaced the o-ring on the valve plate, replaced the head. No more air leaks.
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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.
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.
