Piston Stop 904685
Part Number: 904685
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and your part ships today!
Product Information
Description:
| This is a genuine Porter Cable replacement part, it is sold individually. This part acts as a cushion when the piston/driver retracts back into the cylinder after being fired. Because this part get so much abuse it has a tendency to crack and fall apart. If the part is damaged or falls out you should replace it. |
Frequently Purchased With
Compatibility
This part is compatible with the following machines:
Products Compatibility
This item works with the following types of products:
- • Nailer
Questions & Answers for Piston Stop
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Repair Instructions: Submitted by Customers Like You
18 of 18 people found this instruction helpful
Tool Type:
Nailer
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Pliers, Hex wrenches
Rebuild head valve
The piston stop had hardened and crumbled. I removed the top of the gun by removing the four hex screws. Then the top of the gun comes off and you can take out the piston stop. I also replaced the head valve seal because it is made out of the same kind of plastic. Pretty easy and now the gun works again.
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6 of 6 people found this instruction helpful
Tool Type:
Nailer
Parts Used:
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
, Allen wrench
Would not drive nails. Driver rod would not fully retract preventing a new nail from loading
1. Removed top cover
2 Removed shattered piston stop and cleaned out all of the bits and pieces
3. Reassembled and tested
4..OK
2 Removed shattered piston stop and cleaned out all of the bits and pieces
3. Reassembled and tested
4..OK
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5 of 5 people found this instruction helpful
Tool Type:
Nailer
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
, Allen keys
Urethane Piston stop crumbled
Super easy, E replacements online video walked me though it. The repair it showed was different than mine, but the disassembly steps showed me how to take apart the gun in order to diagnose the issue.
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3 of 3 people found this instruction helpful
Tool Type:
Nailer
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
, Alan wrench
The gun would not nail and a lot of air came out of the top
Removed the cylinder cap from the top of the gun. I then noticed the broken piston stop and loose head seal. I removed all of the pieces of the broken piston stop. and replaced the head seal. Thoroughly cleaned the inside and oiled it. It fires nails like it new.
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2 of 2 people found this instruction helpful
Tool Type:
Nailer
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Wrench Set, Dental pick to clean debris
Leaking air at rop
Remover allen head screws.
Gently, lifted head from body careful not to damage gasket.
Removed damaged parts and replaced.
Gently, lifted head from body careful not to damage gasket.
Removed damaged parts and replaced.
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1 of 1 people found this instruction helpful
Tool Type:
Nailer
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Allen wrench
Worn out seals and busted piston bumper
Follow video that was provided by ereplacement parts and then go from there.
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Tool Type:
Nailer
Parts Used:
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Allen wrench
Piston stop shattered
Removed the head of the nailer with an allen wrench
Cleaned out all the debris from the old piston stop
Installed new piston stop
Reassembled nailer head.
Cleaned out all the debris from the old piston stop
Installed new piston stop
Reassembled nailer head.
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Tool Type:
Nailer
Parts Used:
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
, Allen wrench
Nailer leaked air and would not fire nails
Replaced part (which had totally degraded into several pieces) and put back together (second time correctly). Nailer worked great after that.
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Tool Type:
Nailer
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
, Allen Wrench
Non-metalic internal parts disintigrated
1. Disassembled Nailer
2. Removed debris, residue and broken parts
3. Installed new parts.
4. Applied pressurized air and tested for correct operation.
5. Test failed. Nailer drove one nail, but did not reset. All air pressure lost.
6. Disassembled Nailer again.
7. Installed parts correctly.
8. Reassembled and retested.
9. Nailer worked properly.
2. Removed debris, residue and broken parts
3. Installed new parts.
4. Applied pressurized air and tested for correct operation.
5. Test failed. Nailer drove one nail, but did not reset. All air pressure lost.
6. Disassembled Nailer again.
7. Installed parts correctly.
8. Reassembled and retested.
9. Nailer worked properly.
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Tool Type:
Nailer
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Pliers, Allen wrench
air finish nailer leaking air from top of gun
1) Open top
2) Remove broken / deteriorated parts, replace with new parts. Only hard part was the old piston stop needed needle-nose pliers to pull out.
3) Close top
2) Remove broken / deteriorated parts, replace with new parts. Only hard part was the old piston stop needed needle-nose pliers to pull out.
3) Close top
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Reviews
11 Reviews
Average Rating (out of 5):
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Great company
Correct part. Shipped quick. Recommend
Guest -
May 5, 2023
Verified Purchase
Easy repair.
Perfect part to get my nail gun back to operating.
Joel -
March 25, 2023
Verified Purchase
Nailer works like newe.
Always confident in dealing with ereplacement that I will get what I need.
Peter -
January 17, 2023
Verified Purchase
Piston stop
So far so good. We’ll see after using for a while:
GABRIEL -
April 29, 2021
Verified Purchase
Piston Stop for nail gun.
Great site to buy from. Received the right part in a timely manner. Will definitely recommend this site.
Guest -
March 29, 2021
Verified Purchase
Quick service
I needed a small part, was notified they were out of stock. The caller told me where I could go to get my tool repaired. I went there and was told that repair would be almost the cost of a new tool. When I got home the part from eReplacement was in the mailbox.
Guest -
June 8, 2020
Verified Purchase
Exact replacement
Part was received early and in great shape. Was exactly as specified and shown in product picture
Roger -
October 25, 2019
Verified Purchase
Easy and necessary repair
I had a rebuild kit for a long time and finally got around to doing the repair. I opened the top of the gun and the piston stop was rotted and in pieces! No Wonder the gun did not work right. This piece was not in the "official" rebuild kit so I got it from E-Replacements and it went right in and now the tool works perfectly. Easy to do and simply essential!
Guest -
October 15, 2019
Verified Purchase
Great service. Parts arrived on time!
See above.
Guest -
September 11, 2019
Verified Purchase
Works great!
My nail gun is sitting in my storage for years, thinking about throwing it because its not working. But when i heard about ereplacementparts.com, and ordered the part, it brings back the life on my tool. I should have known that earlier before i bought a new one. Thank you very much. Still have some tools that needs some repair. That will be next.
David -
July 5, 2019
Verified Purchase
Verified Purchase
eReplacementParts Team
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Product Information
