Easy
15-30 minutes
This is a genuine Hitachi part that is sourced from the original manufacturer to ensure a high level of quality. The exhaust valve is used with pneumatic nailers and staplers. This item fits into the head cap. This item is used to allow air to escape when a fastener is fired to allow the piston to rise back up the cylinder. This item is available as an individual replacement part.
Exhaust Valve 878539
OEM part for: Metabo HPT
Part Number: 878539
$8.67
In Stock
Ships within 1 business day 
Jump To:
Frequently Purchased Together ?
Compatibility
This Exhaust Valve will fit the following 12 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 11 of 12 matching models.
Metabo HPT
Show More Compatible Models12 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Metabo HPT
This item works with the following types of products:
- Nailer
- Stapler
Repair Videos ?
Watch the Repair Video for
Exhaust Valve
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 Exhaust Valve
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.
Nail gun wouldn't cycle
Arlyn - August 13, 2022
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, hex driver
Parts Used
Removed cap and replaced exhaust valve.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Leaking air from exhaust pirt
Brad - December 23, 2020
Tool Type
Stapler
Difficulty
Medium
Time
30-60 minutes
Tools Used
, Allen wrench(metric)
Removed head
Removed exhaust deflector
Replaced all pets in head
Hard time removing part on outside of cylinder so I could replace o-ring between cylinder.
Found taped holes in part I couldn’t remove, screwed in two screws from head removal and could pull part out.
Replaced cylinder o-ring
Put back together
Still leaked from exhaust port
Disconnected from air supply and reconnect to air supply while holding trigger down.
Heard plop of driver returning to top
Air leak quit and stapler works great
Don’t know if any of the parts repaired the leak, moral of the story, try connecting to air supply while holding trigger
Removed exhaust deflector
Replaced all pets in head
Hard time removing part on outside of cylinder so I could replace o-ring between cylinder.
Found taped holes in part I couldn’t remove, screwed in two screws from head removal and could pull part out.
Replaced cylinder o-ring
Put back together
Still leaked from exhaust port
Disconnected from air supply and reconnect to air supply while holding trigger down.
Heard plop of driver returning to top
Air leak quit and stapler works great
Don’t know if any of the parts repaired the leak, moral of the story, try connecting to air supply while holding trigger
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Leaks air, doesn't drive staple
Keith - February 11, 2018
👍 0 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Remove Cap, replaced parts, put cap back on.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
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.
