Easy
15-30 minutes
This is an authentic replacement part manufactured for use with Craftsman air compressors. This special o-ring is used to for a seal on the valve plate. It is recommended to replace worn o-rings as part of normal maintenance, and this o-ring is available as an individual replacement part.
O-ring ACG-45
OEM part for: Craftsman
Part Number: ACG-45
$4.99
In Stock
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Compatibility
This O-ring will fit the following 395 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Craftsman
Show More Compatible ModelsThis item works with the following types of products:
- Compressor Parts
Customer Part Reviews ?
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i got all the parts i ordered and pretty quick , and they were all the right parts , i will be ordering parts from you again ,,, Thanks
Guest -
April 23, 2021
Verified Purchase
part was exactly a match
part works great and shipping was spot on
Guest -
April 20, 2021
Verified Purchase
Found Craftsman Parts
My Craftsman compressor would
not compress past 40 psi. This is the second time replacing the o-rings. Previously the piston and seal were replaced. Fortunately the o-rings and other critical parts were found at e Replacement Parts and easily installed. The compressor runs quieter and fills to the 150 psi specification.
Terry -
October 27, 2020
Verified Purchase
Simple repair.
Perfect replacement part. My compressor is working like new again.
Marc -
August 17, 2020
Verified Purchase
Ordered several repair items for air compressor.
All parts worked and repair accomplished successfully
Guest -
June 2, 2020
Verified Purchase
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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 build pressure
glen - August 21, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Compressor
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
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.
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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would'nt build up air
John - May 28, 2023
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
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
is obsolete. put back together works just fine now builds up air like it should easy fix
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Compressor would not build pressure, also external regulator leaked.
William - January 6, 2023
Tool Type
Compressor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Adjustable Wrench
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 tightening 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.
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 tightening 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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Piston ring worn out
Douglas - December 29, 2022
Tool Type
Compressor
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
Disassemble compressor and removed cylinder and installed new ring.
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compressor ring was worn out.
john - August 1, 2022
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
removed head from compressor,(4- bolts) took 1 screw out of the piston removed old compressor ring, installed new compressor ring put screw back in piston. Installed new o-rings,and put cylinder head back on compressor.
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Compressor was not building pressure over 89 lbs.
Mike - July 5, 2022
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, 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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Poor recharge of air compressor tank
Chuck - July 14, 2021
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set, Nutdriver
Removed head, removed and honed cylinder (replacement cylinder not available), replaced all o rings and compression seal.
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Would not store air in tank/build pressure.
Pete - July 7, 2021
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Wrench Set, Adjustable Wrench
Parts Used
Took apart head and found the o-ring split.
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no air pressure for compressor
Rob - February 18, 2021
Tool Type
Compressor
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
replaced piston ring and necessary o-rings
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Compressor was not building any pressure.
Sergio - May 5, 2019
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Torque wrench
Cleaned up and removed worn compression ring.
Installed new o and compression ring and torqued to specifications.
Installed new o and compression ring and torqued to specifications.
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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.
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.
