Part Location Diagram of ACG-45 DeWALT ORING P/L HEAD
See part B-83 in the diagram
Replacing your DeVilbiss Compressor ORING P/L HEAD
( Grid squares measure 1x1 inch )

ORING P/L HEAD ACG-45

Manufactured by:
DeWALT
ERP Number:
ERP12513125
Part Number:
ACG-45
Original Equipment Manufacturer ?
  Works with your model  CFFR350C!
In Stock
Delivers in 3-5 Business Days!
Minimum Quantity of 2 required

Easy 

30 - 60 mins 

(19 rated repairs) ?
  Works with your model   CFFR350C!

Product Description

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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: • <u>Extrusion and Nibbling</u> - 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. • <u>Abrasion</u> - 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. • <u>Over Compression </u> - The O-ring is flattened on both sides and may have a "ring" split along its length. Commonly caused by excessive pressure or heat. • <u>Heat Hardening</u> - The O-ring has a pitted or cracked surface, and is often flattened on both sides. Caused by temperature exceeding o-ring capacity. • <u>Weather/Ozone Cracking</u> - 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.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • DeVilbiss
  • Craftsman
  • Porter Cable
  • DeWALT
  • Black and Decker
  • Stanley
  • Bostitch
This part works with the following products:
  • Compressor
Part# ACG-45 replaces these:
  • ACG-45
  • PACG-45

Videos For installing this part.

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Replacing your ORING P/L HEAD

Customer Part Reviews

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Average Rating (out of 5):
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Questions & Answers

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My compressor runs fine but doesn't buildup air pressure and I've drained it and placed a bit of oil in the tank to help prevent condensation still no pressure please help
Sammie For model number Craftsman 919-165220 - March 20, 2023

Hello Sammie, Thank you for your inquiry. We would recommend checking the pressure switch, the safety valve, the regulator, the o-rings (which also come with the valve plate kit) and the piston seal. Check for any visible damage and you can test the pressure switch with a multimeter. If you are unfamiliar with how a multimeter works, we have a video on how to use one. Good luck with your repair. https://www.youtube.com/watch?v=Lx74qIn3YB4

eReplacementParts Team
March 20, 2023

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Does valve Plat come with o rings
Steve For model number 919167620 - May 27, 2023

Hello Steve, thank you for your question. No, the plate does not come with either of the Orings A03856 and ACG-45. Good luck with your repair.

eReplacementParts Team
May 27, 2023

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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.

Easy 

30 - 60 mins 

(19 rated repairs) ?
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Compressor was not building pressure over 89 lbs.

Mike from RICHWOOD, Ohio

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Socket set
Took apart and put new cylinder sleeve in, re-installed the piston and rod, put o-ring on cylinder plate, o-ring on head and re-installed them. Then hooked up air line to tank. Intallled filter and plugged in. Watched for pressure building. Worked well.
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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 from Exeter, New Hampshire

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Socket set
Parts Used:
AC-0798, A03856, ACG-45
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-in stalled cover.
7. Restarted compressor. No problems.
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Head Bolts Broken off

Earl from Bloomer, Wisconsin

2 of 2 people found this instruction helpful.
Difficulty Level:
Difficult
Total Repair Time:
1- 2 hours
Tools:
Pliers, Screw drivers, Socket set
Parts Used:
N022307, AC-0798, A03856, ACG-45
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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Compressor would not build pressure, also external regulator leaked.

William from Worcester, Vermont

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Screw drivers, Socket set, Wrench (Adjustable)
Parts Used:
K-0650, ACG-45, Z-AC-0032
Removed cover, and cooling fan.
On low pressure cylinder:
- Removed valve plate assy, piston/rod, and cylinder.
- Installed new cylinder.
- Replaced piston seal: removed piston top, replaced seal on piston, put piston top back on piston and hand tightened screw a bit, inserted piston in cylinder, finished tightenin g piston top screw.
- Attached piston rod to crank, replaced fan.
- Placed and tightened new valve assembly with new o-rings.
Removed/replaced external regulator.

Did not address high pressure side, parts are no longer available.
Still, compressor does build pressure good as new.
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Compressor was not building any pressure.

Sergio from Moreno Valley, California

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Socket set
Parts Used:
CAC-248-2, CAC-1371, ACG-45
Cleaned up and removed worn compression ring.
Installed new o and compression ring and torqued to specifications.
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would\'nt build up air

John from TOWANDA, Pennsylvania

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set, Wrench set
Parts Used:
D24233, ACG-45, DAC-308
removed plastic covers.and took cylinder apart.and replaced ring/was wore and got some fine sand paper and sanded sleve down alittlewas rough from ring bad could\'nt get a new one cuase
is obsolete. put back together works just fine now builds up air like it should easy fix
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Head bolt for compressor broke.

James from JAMESTOWN, North Dakota

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
More than 2 hours
Tools:
Nutdriver, Socket set, Wrench (Adjustable)
Parts Used:
AC-0798, A03856, ACG-45, A09819SV
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
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no air pressure for compressor

Rob from Lebanon, Indiana

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set, Wrench set
replaced piston ring and necessary o-rings
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moisture had rusted reed valves(intake) on valve plate

JULIAN from YANCEYVILLE, North Carolina

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Socket set, Wrench (Adjustable)
Parts Used:
A03856, ACG-45, A09819SV
disassembled valve plate assembly/ordered parts/cleaned head and replaced valve plate assembly
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Wouldn\'t build pressure

glen from casey, Illinois

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Socket set, Wrench set
Parts Used:
N015593, ACG-45, Z-AC-0032
1. Disassembled second stage head
2. Replaced head, head gasket, and o-rings
3. Re-assembled, still wouldn\'t build pressure
4. Ordered new piston and cylinder assembly
5. Installed assembly and unit works like new
Should have known to replace piston and cylinder at initial disassembly because it was showing high wear.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP12513125
Manufacturer Part Number: ACG-45
Brand Model Number Description
DeVilbiss 100E3D-1 Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 100E4D Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 100E4D-1 Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 100E4D-2 Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 100E8AD-2 Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 100E8AD-3 Compressor - 1 Horsepower-Single Cylinder Air Compressor
DeVilbiss 150E4D-1 Compressor - 1.5 Horsepower-Single Cylinder Air Compressor
DeVilbiss 150E4D-2 Compressor - 1.5 Horsepower-Single Cylinder Air Compressor
DeVilbiss 150E4TTD Compressor - 1.5 Horsepower-Single Cylinder Air Compressor
DeVilbiss 150E4TTD-1 Compressor - 1.5 Horsepower-Single Cylinder Air Compressor
Craftsman 16871 Compressor - Air Compressor
DeVilbiss 1WC94 Compressor - Construction Compressor
DeVilbiss 1WC95 Compressor - Workshop/Auto Compressor
DeVilbiss 3JR71 Compressor - Workshop/Auto Compressor
DeVilbiss 4UP72 Compressor - A 6.0hp 25g Vp Pl 1stg 12
DeVilbiss 4UP73 Compressor - A 3.5hp 20g Hp Tv 1stg 12
DeVilbiss 4UP74 Compressor - A 3.5hp 20g Vp Tv 1stg 12
DeVilbiss 500TVE60V-2 Compressor - Air Compressor
DeVilbiss 5Z598C Compressor - A 2.0hp 3g Hd Pl 1stg 120
DeVilbiss 66-651 Compressor - Air Compressor
Craftsman 919-15445 Compressor - A 1.5hp 4g Ss Pl 1stg 120
Craftsman 919-16345 Compressor - A 1.5hp 4g Pc Pl 1stg 120
Craftsman 919-16500 Compressor - A 5.0hp 25g Hp Pl 1stg 12
Craftsman 919-16511 Compressor - A 6.0hp 33g Hp Pl 1stg 12
Craftsman 919-16512 Compressor - A 5.0hp 20g Hp Pl 1stg 12
Craftsman 919-16513 Compressor - A 6.0hp 30g Vp Pl 1stg 12
Craftsman 919-16518 Compressor - A 5.5hp 25g Hp Pl 1stg 12
Craftsman 919-16519 Compressor - A 5.5hp 25g Vp Pl 1stg 12
Craftsman 919-16523 Compressor - A 5.5hp 25g Vp Pl 1stg 12
Craftsman 919-16551 Compressor - A 6.0hp 30g Vp Pl 1stg 12