Easy
15-30 minutes
This is a manufacturer sourced replacement part designed for use with Chicago Pneumatic ratchet/wrenchs. This o-ring provides an air-tight seal for the valve. Over time this o-ring will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber and it is sold individually.
Replacing this item you would need hex key/allen wrench and pliers to replace this item.
O-ring A082777
OEM part for: Chicago Pneumatic
Part Number: A082777
$4.99
In Stock
Ships within 1 business day 
Jump To:
Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This O-ring will fit the following 67 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 67 matching models.
Chicago Pneumatic
Show More Compatible Models67 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Chicago Pneumatic
This item works with the following types of products:
- Grinder
- Impact Wrench
- Ratchet Wrench
- Sander
- Screwdriver
This part replaces obsolete part #: CA157201, C136940, C136939, CA146654, C102551
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
4
4 stars
1
3 stars
0
2 stars
0
1 stars
0
< PREV
- 1
Parts worked perfectly
Was sceptical ordering these at first, however the detail about the order and the tracking was perfect. Thank you
Guest -
December 20, 2022
Verified Purchase
Good service and on time thanks
Arrived in perfect condition
iGlobal -
December 13, 2022
Verified Purchase
Easy repair
It was an easy repair and the part fit perfect
Guest -
September 24, 2021
Verified Purchase
parts were exactly what I expected. Air wrench now works well
parts were exactly what I expected. Air wrench now works well
iGlobal -
March 18, 2020
Verified Purchase
Right part
Fast delivery.
Exactly what I needed.
Guest -
October 21, 2021
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for O-ring
No questions have been asked yet
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.
Throttle valve cracked from age
Oliver - September 9, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Removed the throttle valve plug
Remove the old o-ring, spring and throttle valve
Installed the new throttle valve, spring and o-ring on the throttle valve plug and tightened it
Remove the old o-ring, spring and throttle valve
Installed the new throttle valve, spring and o-ring on the throttle valve plug and tightened it
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Bought as junk, tore it apart and went online to see what was missing. Worked when reassembled.
donald - April 2, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Adjustable Wrench
Cleaned the tool inside and out
Remove the throttle valve plug
Installed the throttle valve
Installed the spring
Put the o-ring on the valve plug
Dropped some air tool in it, hooked it up to the air hose, It ran like a new tool
Remove the throttle valve plug
Installed the throttle valve
Installed the spring
Put the o-ring on the valve plug
Dropped some air tool in it, hooked it up to the air hose, It ran like a new tool
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Air Ratchet would not work, It had not been used in quite a while.
Richard - November 20, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Replaced the Throttle Value and "O" Ring. The old ones had gotten Hard and cracked. It now works great.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
The valve throttle in my 3/8 inch air ratchet wrench disintegrated after sitting for an extensive period of time.
Joe - November 15, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed plug with the screwdriver. Replaced valve-throttle, O-ring, and plug. Lubricated the wrench with air tool lubricant. Worked perfectly. Straight forward repair using the diagram on the website. No issues.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Air tool trigger would not turn off or control tool.
Jay - October 7, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Replaced plug throttle valve only a couple parts in there. It is a 20 year old CP air ratchet I was surprised you had parts for it. Easy cheep fix. I will always check eReplacementParts first.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Unit wouldn't shut off
Randall - September 21, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Unscrewed plug, removed spring, replaced sealing plug, re-assembled.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
No power and air leakage in air ratched wrench
BRUCE - July 7, 2019
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
1. Removed black plastic screw cap from body of wrench.
2. Removed old spring and plastic valve.
3. Cleaned valve seat.
4. Removed o-ring from plastic screw and replaced with new o-ring.
5. Put new valve, spring and cap screw in body
6. Test to confirm.
2. Removed old spring and plastic valve.
3. Cleaned valve seat.
4. Removed o-ring from plastic screw and replaced with new o-ring.
5. Put new valve, spring and cap screw in body
6. Test to confirm.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
air would pass trigger.
Jeffrey - April 2, 2019
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
More than 2 hours
Tools Used
Screwdriver
Parts Used
1. unscrew cap.
2. pull spring and debris.
3. clean area with denatured alcohol.
4. blow down with compressed air.
5. add new throttle valve to spring, with plumbers grease.
6. add o ring to outer housing, with plumbers grease.
7. screw down housing to snug, you are ready to play.
2. pull spring and debris.
3. clean area with denatured alcohol.
4. blow down with compressed air.
5. add new throttle valve to spring, with plumbers grease.
6. add o ring to outer housing, with plumbers grease.
7. screw down housing to snug, you are ready to play.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
The trigger spring and valve were broke.
Patrick - October 17, 2018
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Took the old spring and valve body out and replaced it with new and a new "O" ring also.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Air valve sticking
ricky - September 30, 2018
Tool Type
Ratchet Wrench
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Removed old parts and installed new ones
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Load More Install Stories
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Learn MoreOur 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.
