Easy
15-30 minutes
This replacement piston bumper is designed for use on Hitachi nailers. It is a genuine manufacturer sourced part. The purpose of this piston bumper is to keep the piston from hitting the bottom of the cylinder. If the bumper is cracked or missing pieces you can seriously damage the cylinder. Because this part get so much abuse it has a tendency to crack and fall apart. If you see and parts of this bumper falling from your nail gun, it is definitely time to replace it. This includes one (1) plastic piston bumper.
To complete this repair job you should need a screwdriver set.
• Remove the end cover/cap
• Carefully remove the internal components
• Replace the old bumper with a new one
• Reassemble and test the unit
Piston Bumper 890445
OEM part for: Metabo HPT (Hitachi)
Part Number: 890445
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Product Description ?
- Classification: Part
- Weight: 0.10 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Piston Bumper 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.
Metabo HPT (Hitachi)
Show More Compatible ModelsThis item works with the following types of products:
- Nailer Parts
This part replaces obsolete part #: 884959, 884-959
Customer Part Reviews ?
- 1
Questions & Answers ?
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Does this fit my product?Questions & Answers for Piston Bumper
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.
The driver was returning slow and made strange noise
Took out the inner driver wall
Took out driver
Then removed broken bumper
Put back in new bumper make sure bumper is right way it has a bevel to fit on bottom over all it is pretty simple fix gun works like new
Bumper broke and damage the piston o-ring
Tool Type
Nailer
Difficulty
Easy
Time
30-60 minutes
Tools Used
, Allen wrench
Parts Used
Piece itself broke in 2 piece
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Remove 4 bolts from top cover
Pull piston then replace broken w new piece
Put all back together the same way
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.
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.
