Easy
Less than 15 minutes
This is a genuine OEM approved replacement part designed for use with Hitachi nailers. It is the part of the nail gun that drives the nail into the material that is being used. These assemblies do have a tendency to bend or break if not used correctly or if you are driving nails into extra hard material. Includes a metal piston, driver and the o-ring.
To help extend the life of a pneumatic tool use the specified oil in it daily 4-5 Drops will do every time you use it.
To replace this part you would need a hex key/allen wrench.
• First you want to remove the exhaust cover
• Remove old piston assembly and install new one
• Secure the cover and test the unit
Piston Driver Assembly 890385
OEM part for: Metabo HPT (Hitachi)
Part Number: 890385
$39.04
In Stock
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Product Description ?
- Classification: Part
- Weight: 0.26 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 10 machines
Metabo HPT (Hitachi)
NR83A2(S) Framing Nailer, Full Head, Plastic Strip Collation (without Depth Adjustment) View Diagrams & Manuals
NR83A 3-1/4" Full Head Nailer View Diagrams & Manuals
NV75A Nailer View Diagrams & Manuals
NR83A3S Strip Nailer View Diagrams & Manuals
NR83A3 Strip Nailer View Diagrams & Manuals
NR83A2 Strip Nailer View Diagrams & Manuals
NR83A5 Strip Nailer View Diagrams & Manuals
NR83A5(S)M 3-1/4 Inch Rnd Head Framing Nailer W/Out Depth Adjustment View Diagrams & Manuals
NR83A5M 3-1/4 Inch Rnd Head Framing Nailer W/ Depth Adjustment View Diagrams & Manuals
NR83A5(S) Nailer View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Nailer Parts
This part replaces obsolete part #: 885915, 877323, 877-323, 885-915
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Part is great...slow delivery
The driver works great. The delivery was slow
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December 10, 2020
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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.
Driver broken
Robert - June 7, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
I removed the four hex head screws from the top cover. I was able then to remove the broken driver and the piece that broke off. I cleaned the inside of the gun and oiled it. Then put the new o-ring on the piston, then inserted the driver into the cylinder. Placed the the top cover back on, and tightened the screws diagonally to keep equal pressure on the cover. Now the gun works like a new one.
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Piston leaked air
Chris - May 23, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Remove the for bolts from the top cap and remove the cap. Remove the old piston, then place the o-ring on the new piston and insert it into the cylinder. Clean the surfaces of where the new gasket is to be placed, be careful not to scratch or mar them. Place gasket on the tool and attach the top cap with the four bolts.
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Broken driver piston
Russ - September 20, 2023
Tool Type
Nailer
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
, Allen wrenches
Parts Used
Took off top of nail gun replaced piston put back together
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Wasn't inserting nails.
Sergio - May 2, 2021
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Wrench Set
Remove the trigger hold pin.
Remove the four bolts from the bottom cover.
Remove the old piston bumper.
Remove the piston assy.
Put the new piston assy.
And the new piston bumper
Spray wd-40 inside little bit.
Put everything together and make a test.
Remove the four bolts from the bottom cover.
Remove the old piston bumper.
Remove the piston assy.
Put the new piston assy.
And the new piston bumper
Spray wd-40 inside little bit.
Put everything together and make a test.
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NAIL BROKE THE END OFF OF THE PISTON
JACK - October 21, 2019
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, ALLEN WRENCHES
REMOVED BROKEN PART,REINSTALLED PISTON AND NEW BUMPER.REPAIR FINISHED
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Driver broke off of piston
Ray - May 14, 2018
👍 1 of 2 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set, Metric Allen wrench set
Parts Used
Removed 4 large Allen bolts at top of nailer.
Removed damaged piston driver.
Inspected cylinder, bumper, gaskets and o rings.
Apply oil to o ring and piston/cylinder.
Installed new piston driver and o ring.
Reinstalled cap and 4 Allen bolts.
Removed damaged piston driver.
Inspected cylinder, bumper, gaskets and o rings.
Apply oil to o ring and piston/cylinder.
Installed new piston driver and o ring.
Reinstalled cap and 4 Allen bolts.
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Piston snapped
Frank - December 10, 2017
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed top cap
Removed broken piston
Replaced piston with new one
Replaced top cap.
Removed broken piston
Replaced piston with new one
Replaced top cap.
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Broken piston and crack bumper
Victor - January 27, 2017
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Unscrew four screws and pull up the cover and pushed out the broken piston. And for the bumper remove four more screws the tip of the nail gun take out the old bumper put the new one and start putting everything back together.
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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.
