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Repair Parts Home    Power Tool Parts    Porter Cable Parts    Porter Cable Finish Nailer Parts    

Porter Cable FN250A Finish Nailer Parts

Porter Cable FN250A Finish Nailer porter_cable logo

 Porter Cable FN250A Finish Nailer Parts

Page A

 Fig # Part # Img Part Name Availability Price Qty
99904673
Warning Label
Warning Label
Ships in 9 - 13 business days
$3.52
102883827
Spring Washer
Spring Washer
Ships in 9 - 13 business days
$1.18
103903143
Cylinder Cap Assembly
Cylinder Cap Assembly
Ships in 9 - 13 business days
$67.26
104883912
Set Screw
Set Screw
Ships in 9 - 13 business days
$1.75
105898306
Bolt
Bolt
Ships in 9 - 13 business days
$2.54
106886186
Washer
Washer
Ships in 9 - 13 business days
$2.55
107883849
O-Ring
O-Ring
In stock
4 available
$1.18
108886112
Deflector
Deflector
Ships in 9 - 13 business days
$7.02
109886188
Rubber Pad
Rubber Pad
Ships in 9 - 13 business days
$1.41
110886101
Ball
Ball
Ships in 9 - 13 business days
$1.10
111886189
Spring
Spring
Ships in 9 - 13 business days
$1.10
112886114
Gasket
Gasket
Note: Included In Figure 122
In stock
5 available
$4.77
113886115
BRG Washer
BRG Washer
In stock
3 available
$3.10
114886113
Piston Bumper
Piston Bumper
In stock
12 available
$16.99
115886116
Spring
Spring
Ships in 9 - 13 business days
$4.01
Fig #Part #ImgPart NameAvailabilityPrice
116886085
O-Ring
O-Ring
In stock
3 available
$2.75
117886555
O-Ring
O-Ring
In stock
3 available
$2.59
118892774
HD. Valve Piston
HD. Valve Piston
Ships in 9 - 13 business days
$39.42
119884585
O-Ring
O-Ring
In stock
3 available
$3.35
120886118
Cylinder Press Ring
Cylinder Press Ring
Ships in 9 - 13 business days
$8.54
121908890
O-Ring
O-Ring
Note: Included In Figure 122
In stock
2 available
$2.86
903767
Driver Maint Kit
Driver Maint Kit
Note: Included In Figure 122
In stock
4 available
$69.63
903767
Driver Maint Kit
Driver Maint Kit
Note: Includes Figures 112, 121, 122, 126, and 129
In stock
4 available
$69.63
123886079
O-Ring
O-Ring
In stock
3 available
$2.34
124891022
Cylinder
Cylinder
Ships in 9 - 13 business days
$46.80
125886119
Check Seal
Check Seal
In stock
3 available
$4.43
126886122
Bumper
Bumper Obsolete - Not Available
Note: Included In Figure 122
Discontinued
$0.00N/A
127886121
Cylinder Spacer
Cylinder Spacer
Ships in 9 - 13 business days
$10.12
128886098
O-Ring
O-Ring
Ships in 9 - 13 business days
$3.59
130886123
Driver Guide
Driver Guide
Ships in 9 - 13 business days
$4.01
Fig #Part #ImgPart NameAvailabilityPrice
131897480
Base
Ships in 9 - 13 business days
$38.48
134903505
Muffler Obsolete - Not Available
Discontinued
$0.00N/A
200A08368
Trigger Valve Assembly (Not Threaded)
Trigger Valve Assembly (Not Threaded)
Ships in 9 - 13 business days
$33.48
883831
O-Ring
O-Ring
In stock
7 available
$1.18
897340
O-Ring
O-Ring
Ships in 9 - 13 business days
$1.00
897342
Cap
Cap
Ships in 9 - 13 business days
$6.43
883934
Breather Valve
Breather Valve
Ships in 9 - 13 business days
$14.81
883935
O-Ring
O-Ring
Ships in 9 - 13 business days
$1.18
897341
O-Ring
O-Ring
Ships in 9 - 13 business days
$1.00
204883936
O-Ring
O-Ring
In stock
4 available
$1.18
205897374
Pin (3X12)
Pin (3X12)
Ships in 9 - 13 business days
$1.00
206883937
Trigger Valve
Trigger Valve
Ships in 9 - 13 business days
$13.55
207883938
O-Ring
O-Ring
In stock
4 available
$1.18
208883939
Plunger Spring
Plunger Spring
Ships in 9 - 13 business days
$1.18
897346
Plunger
Plunger
Ships in 9 - 13 business days
$1.00
Fig #Part #ImgPart NameAvailabilityPrice
883940
Plunger
Plunger
Ships in 9 - 13 business days
$7.55
210883848
O-Ring
O-Ring
In stock
17 available
$1.18
883941
Trigger Cap
Trigger Cap
Ships in 9 - 13 business days
$25.86
897347
Valve
Valve
Ships in 9 - 13 business days
$6.77
212883942
O-Ring
O-Ring
Ships in 9 - 13 business days
$1.18
214893930
Bottom Fire Trigger
Bottom Fire Trigger Obsolete - Not Available
Discontinued
$0.00N/A
2145140030-09
Bottom Fire Trigger
Bottom Fire Trigger
Ships in 9 - 13 business days
$9.96
215883945
Rolled Pin
Rolled Pin
In stock
1 available
$1.18
216884404
Rolled Pin (before serial number 80046)
Rolled Pin (before serial number 80046)
In stock
1 available
$4.43
890722
Trigger Pivot Pin (after serial number 80046)
Trigger Pivot Pin (after serial number 80046)
In stock
3 available
$7.93
884404
Rolled Pin (before serial number 80046)
Rolled Pin (before serial number 80046)
In stock
1 available
$4.43
218890725
Urethane Retainer
Urethane Retainer
In stock
25+ available
$1.84
219898323
Pin
Pin
Ships in 9 - 13 business days
$1.60
301901386
Housing
Ships in 9 - 13 business days
$110.76
302886099
O-Ring
O-Ring
Ships in 9 - 13 business days
$4.43
Fig #Part #ImgPart NameAvailabilityPrice
303886124
End Cap
End Cap
Ships in 9 - 13 business days
$12.31
304883859
Male Quick Coupler
Male Quick Coupler
Ships in 9 - 13 business days
$8.56
305884443
Protective Cover
Protective Cover
In stock
20 available
$1.51
403886542
Guide Cover B
Guide Cover B
Ships in 9 - 13 business days
$4.43
404907270
Guide Plate
Guide Plate
Ships in 9 - 13 business days
$35.15
405886075
Rolled Pin
Rolled Pin
Ships in 9 - 13 business days
$4.95
406886618
Guide Cover A
Guide Cover A
Ships in 9 - 13 business days
$20.41
407886256
Bolt
Bolt
Ships in 9 - 13 business days
$1.75
408888792
Latch Unit
Latch Unit
Ships in 9 - 13 business days
$14.49
409886136
Magazine Spacer
Ships in 9 - 13 business days
$6.34
886140
Lock Spring
Lock Spring
Ships in 9 - 13 business days
$1.84
888794
Lock Spring
Lock Spring
Ships in 9 - 13 business days
$1.10
412886543
Spring Fastener
Spring Fastener
Ships in 9 - 13 business days
$1.41
413886109
Spring
Spring
Ships in 9 - 13 business days
$11.38
414886069
E-Ring
E-Ring
Ships in 9 - 13 business days
$1.10
Fig #Part #ImgPart NameAvailabilityPrice
415893809
Pusher
Ships in 9 - 13 business days
$18.15
416886135
Channel
Channel
Ships in 9 - 13 business days
$7.93
417886261
Bolt
Ships in 9 - 13 business days
$1.34
418893810
Magazine Cover
Magazine Cover
Ships in 9 - 13 business days
$16.57
419886126
Spring
Ships in 9 - 13 business days
$9.54
420883882
Lock Nut
Lock Nut
In stock
3 available
$1.18
423886447
Driver Guide Safety
Driver Guide Safety
Ships in 9 - 13 business days
$6.91
883898
Bolt
Bolt
Ships in 9 - 13 business days
$1.75
883866
Bolt
Bolt
Ships in 9 - 13 business days
$1.18
425883867
Spring Washer
Spring Washer
Ships in 9 - 13 business days
$1.18
426893811
Bracket
Bracket
Ships in 9 - 13 business days
$11.46
427886259
Bolt
Bolt
Ships in 9 - 13 business days
$1.10
428883971
Washer-Flat
Washer-Flat
Ships in 9 - 13 business days
$1.41
429883970
Nut-Lock
Nut-Lock
Ships in 9 - 13 business days
$1.41
430887922
Safety Assembly Obsolete - Not Available
Discontinued
$0.00N/A
Fig #Part #ImgPart NameAvailabilityPrice
432888919
End Plate
End Plate
Ships in 9 - 13 business days
$4.43
433887913
Safety Guide
Ships in 9 - 13 business days
$21.02
434887969
Safety Spring
Safety Spring
Ships in 9 - 13 business days
$2.34
435886218
Ring
Ring
Ships in 9 - 13 business days
$1.10
436886128
Safety
Safety
Ships in 9 - 13 business days
$7.55
437886561
Thumb Wheel
Ships in 9 - 13 business days
$10.88
438887914
Safety Unit Obsolete - Not Available
Discontinued
$0.00N/A
439886137
Nose Cushion
Nose Cushion
In stock
25+ available
$4.43
440886139
Nail Guide
Nail Guide
In stock
3 available
$4.43
441884592
Bolt
Bolt
Ships in 9 - 13 business days
$1.18
443883864
Bolt
Ships in 9 - 13 business days
$1.75
893812
Magazine Assembly.
Magazine Assembly.
Ships in 9 - 13 business days
$67.87
898283
Driver Gde/Mag. Assembly
Ships in 9 - 13 business days
$102.49
884541
Screw
Screw
Ships in 9 - 13 business days
$1.18
894745
Bolt
Bolt
Ships in 9 - 13 business days
$2.09
Fig #Part #ImgPart NameAvailabilityPrice
891903
Hex Wrench 2.5mm
Hex Wrench 2.5mm
Ships in 9 - 13 business days
$5.12
884298
Hex Wrench (4mm)
Hex Wrench (4mm)
Ships in 9 - 13 business days
$5.12
884297
Hex Wrench (3mm)
Hex Wrench (3mm)
Ships in 9 - 13 business days
$5.12
800884293
Air Tool Oil (18CC)
Air Tool Oil (18CC)
In stock
10 available
$2.86
836903789
Overhaul Kit (Order Piston Bumper p/n 886113 Seperately)
Overhaul Kit (Order Piston Bumper p/n 886113 Seperately)
Note: This Kit Includes The Seals, Head Gasket, Lower Bumper, Trigger Kit and Pin and Check Seal
Ships in 9 - 13 business days
$75.32
856634065-01
Safety Glasses
Safety Glasses
Ships in 9 - 13 business days
$6.88
887712
Carrying Case Latch
Carrying Case Latch
In stock
21 available
$1.18
890687
Carrying Case Obsolete - Not Available
Discontinued
$0.00N/A
896004
Soft Carrying Case
Ships in 9 - 13 business days
$59.84
1000903767
Driver Maint Kit
Driver Maint Kit
In stock
4 available
$69.63
1001903789
Overhaul Kit (Order Piston Bumper p/n 886113 Seperately)
Overhaul Kit (Order Piston Bumper p/n 886113 Seperately)
Note: This Kit Includes The Seals, Head Gasket, Lower Bumper, Trigger Kit and Pin and Check Seal
Ships in 9 - 13 business days
$75.32

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Discussion
Discussion for the Porter Cable FN250A Finish Nailer

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  • Subject:
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  • Comment:
  •  
I have a Porter Cable FN250A gun that I started to use, I shot one nail, and then it would not load anymore,
But would fire, I saw that the driver was not retracting, I unscrewed the top housing assy, and found crumbled plastic, a hard waxy feel to the plastic, it was all in the bottom of the upper piece where the piston spring sits, I cleaned all this debris out of the housing thinking it was some wax buildup over years from the oil? re-assemble and now the gun leaks air out the port on the housing, reading the forum, many have said that it is the piston stop item 114? does this have anything to do with the air leaking out the top. I'm going to replace this and HD valve O-rings. since the driver assy was working.Where does this piston stop sit in relation to the cylinder under the cylinder cap there are 2 cylinders cast into the cap where the piston slides into outer and inner the cast cylinder on the inner diameter has 8 teeth.
I believe is where the bearing washer sits? Would be great if someone did a step by step youtube of this model.
I do not want to start buying repair kits since they now cost almost as much as a new gun.
Dennis
WJA
Reply: Porter Cable FN250A Leaks Air

WJA

Hello Dennis,

We have prepared an article and video on How to Install an Overhaul Kit in a Porter Nail Gun. This should help you with the installation of the 886113 Piston Bumper.

-WJA
sigala
Reply: Porter Cable FN250A Leaks Air

sigala

Does this apply also to the FN250A Finish gun>
WJA, thanks for the help on this, after viewing the video, I see why the leak is occurring since the piston stop is gone,, it would leak! So I will order the parts. Piston stop and O-rings.
will let you know how it all turns out.,
Thanks again!
Sigala
wargle
Question: PC Finish Nailer

wargle

My finish nailer FN250A stopped driving. Took the top off and found a nylon plug about 5/8" long and 1/2" dia. crosswise on top of the driver. Also, the piston bumper was crumbled. In looking at the exploded dwg. I don't see anything the looks like the nylon plug. Any idea what this is and could it be part of the piston bumper? Thanks.
Tinkerdave
Reply: PC Finish Nailer

Tinkerdave

Hi wargle,
There's no telling what that is .It could be the head valve bumper. Can you email us a picture of it?Thanks.
Tinker
My driver was not retracting after setting a nail so I opened it up. I found the plastic piston stop had deteriorated and was in pieces, but I also found the driver itself has a slight bend to it. I assume the driver isn't supposed to have that bend in it. If I just replace the piston stop, can I try to straighten the driver in a vise or do I need to order a replacement driver kit, too?
WJA
Reply: Bent Driver On Porter Cable FN25...

WJA

Hello 1054592,

You can order the 886113 piston bumper. And try to straighten your driver. You will find out the first time you fire it, if it worked. If it didn't do the job then you can order the 903767 driver maintenance kit. The driver has to be as straight as a new one to work properly. Or it may damage other parts inside the gun.

-WJA
cisco
Question: Driver

cisco

need help the driver fires on the firts but does no tretract back to original position?
need to know what parts may need to be replace to fix problem?
1128744
Question: Guide Cover

1128744

which way does this part install. With the indentation the outside or inside?
thanks
My nail gun was not working properly so I removed the top cap and found some rubbery subastance there that appeared to resemble deteriorated plastic. Could htis be the piston stop Part #886113. Does this come in the rebuild kit for the driver?
Thanks,
Sam Maggio
cisco
Reply: Porter Cable Nailer Model FN250A

cisco

did you get an answer, and was your problem the driver not moving back to its normal position
WJA
Reply: Porter Cable Nailer Model FN250A

WJA

Hello 1023832,

The part number 886113 bumper is sold individually. And is not included in the 903767 driver maintenance kit.

-WJA
barbarron
Question: Urethane Retainer - ( 890725

barbarron

Is this what holds the pin(Item 217) in place?
Tinkerdave
Reply: Urethane Retainer - ( 890725

Tinkerdave

Hi barbarron,
Yes it just pushes over the pin. Hope that helps.Good luck.
Tinker
catfisher521
Question: BRG Washer

catfisher521

What purpose does the BRG washer serve
lonewolfrunning
Question: Finish Nailer/porter Cable 250

lonewolfrunning

most of the time now the gun wants to fire more then 1 nail at a time ---what causes this?
bugboypl
Question: Help With Finish Nailer 250 A

bugboypl

I need help,
My gun has pressure, and is not leaking but when i push on the fire trigger nothing happens. Its not fireing (releasing the nails) Can someone help me find thr reason why this is happening?
675602
Question: Part Time

dirt800

I am working on a Porter Cable finish nailer, FN250A, I have gotten a kit for the upper end part # 903767. My question is on the skematic of the tool it shows a part number 125, check seal. How far on the cylinder does this check seal slide? Do you slide it past the slotted holes in the cylinder or is it supposed to cover the slots?
genek
Reply: Part Time

genek

Hi there,
The check seal will slide up from the bottom of the cylinder and completely cover the holes in the sleeve. Be sure that the thicker part is pointing up, and that the seal is lightly oiled before you up slide the seal onto the cylinder. I hope this helps,
Gene
JOHN
Question: FN250A DRIVER PROBLEM

JOHN

DRIVER DOES NOT RETRACT ALL THE WAY AFTER FIRING
tommy moreno
Question: FN250 Will Not Fire Continuously

tommy moreno

FN250 will not fire continuously.
I have a FN250A Nail gun Porter Cable - was using it and the breaker went off at home. Gun gave a sound of air coming out. Reset breaker and replugged everything and tried to use gun still was letting air out at top but wouldn't shoot or trigger wouldn't work. Took apart and top bumper is plastic bumper is crumbled and gun won't work at all. What part to order to repair it? Thanks Joe
joey robert
Question: Bending Nails

joey robert

When driving nails they are bending. They will not go all of the way in. I am nailing Hardie board. I can't seem to figure out the problem. I've used it before with no problem.
Paul Johnston
Question: Air Leak

Paul Johnston

When the nailer is plugged into the hose under pressure, the nail fires weak and air leaks from the trigger.
Roger Donnelly
Question: Driver Not Returning

Roger Donnelly

My nailer fires the first nail then the driver does not return for the next nail. The driver is not broken, but I did find the plastic piston stop #886113 is shattered at the bottom. Also how does the check seal #886119 install? Do you stretch it so it will fit around the cylinder if so how fare down to you slide it?
Dong Yang
Question: Air Leak Repair

Dong Yang

Air is leaking through the top and the nailer does not work.
Which of the parts do I need to repair?
chris
Question: Fn250a 16 Ga

chris

The gun is firing but the plunger does not come back past the nail. If I open the front and push the plunger up then it will drive the nail. What part should I replace?
Ray Kilgore Jr.
Reply: Fn250a 16 Ga

Ray Kilgore Jr.

I have the same problem, I opened the tool up to find the driver pin assembly broke at the pin holding the driver to the piston. It should be item #122 on your schematic. But the problem is you/we need to buy the whole driver assembly kit, item #60030 not just the driver and piston. I have had this tool for 6 years and this is the first replacement I have had to do. When the driver breaks from the piston it stays at the nails, and doesn't return to it's reset position.
william
Reply: Fn250a 16 Ga

william

Clean the gun and replace the upper piston bumper.
Bill
Question: FN250 Type-1 Driver Wan

Bill

I have an older Porter Cable FN250 type 1. The nail driver will not retract. There is a little plastic or nylon cup that sits on top of the drive piston. It is fractured. I am trying to find a replacement and also replace any O-rings, etc. that should be replaced while I have this thing apart. Is there a rebuild kit that includes this plastic cup and essential O-rings and other parts?
lee crawford
Question: Finish Nailer Problem

lee crawford

The drive pin will not return back to allow a new nail to be chambered.
kmb
Reply: Finish Nailer Problem

kmb

I've had this nailer for about 10 years. Mine started to do the same thing, not returning back far enough to pick up a new nail. When I opened it up the piston stop was broken, part #886113. I'm ordering a new one. I think it will cure the problem.

Hoke
Reply: Finish Nailer Problem

Hoke

It is possible that the Piston Stop has shattered. As the unit gets older the plastic pin stop will get brittle and fail. Remove the 4 screws from the top cap and disassemble. If you see plastic debris, this is probably the problem. Refer to the parts breakdown in this section and order the new parts. When reassembling, be cautious of the o rings, they are a tight fit and will tear if improperly installed.
GHC Hawaii
Question: Won

GHC Hawaii

I have a Porter Cable FN250A that has stopped driving the nail. I don't see any jam and the air pressure seems OK. Is this something easy to fix or should I take it to a professional? Thanks for any suggestions.
Wilmer Layton
Question: Reload

Wilmer Layton

Driver will not return in order to reload.
My Porter Cable finish nailer misfires the majority of the time. I will turn the air pressure control up and it will work for a while and then start the misfiring again. Any suggestions on what I can do to get it to work correctly?

Thanks in advance.
AlphaCarbideLLC
Reply: Porter Cable FN250 Finish Nailer

AlphaCarbideLLC

You may have broken the check seal. Without that, the piston will not retract all the way causing a misfire. Also check to see if there is a piece of nail stuck in the nose.
Let me know how it goes.
tufunuf
Reply: Porter Cable FN250 Finish Nailer

tufunuf

Well...I got tired of trying to figure it out. It is now on Ebay. I started the bidding at $30. You win some and lose some. :) Thanks for the help.
gun will fire but driver does not return. replaced damaged piston stop p.n.#886113 made very little difference. any ideas?? also where exactly does check seal p.n. 886119 set on the cylinder.
genek
Reply: Portercable Finish Nailer FN250A

genek

Hello Retired1,
The check seal covers the holes on the cylinder, with the "wedge" part pointing up. Hopefully this will take care of your problem.
Gene
retired1
Reply: Portercable Finish Nailer FN250A

retired1

[QUOTE=genek;8731]Hello Retired1,
The check seal covers the holes on the cylinder, with the "wedge" part pointing up. Hopefully this will take care of your problem.
Gene"

thank you for your help, will place the check seal in that location and try again after getting my new parts
I have a Porter Cable FN250A Finish Nailer. It shoots fine, but the piston does not retract to allow the next nail to enter, so I have to retract it manually. I opened up the gun and everything appeared to me to be in good shape. I can manually move the piston up and down. It seems to create a seal with a vacuum suction sound when I move it up and down. Everything seemed to be oiled well inside. The plastic cylinder ring was in good shape. I am thinking about ordering the driver rebuild kit, but thought if I understood the theory of operation better, maybe I could figure out the problem. I am guessing here so if someone could explain the theory I would appreciate it. I noticed in the cylinder there are small holes. I am assuming the air enter through those holes normally pushing the piston assembly up. And then when you press the trigger the air is redirected to the top pushing the piston assembly down. I noticed when I push the piston assembly down it goes below those holes. Also could some air be direct up and pushing the piston down? Lastly what does the bumber do and how does it play a role in the piston retracting. Repairing would be easier if I had seen something obviously broken. Any help would be appreciated.

Thanks in advance,
Robert
rotti1968
Reply: Porter Cable FN250A Driver Not R...

rotti1968

I suggest you do a complete cleaning and rebuild of the unit. I dont mess with just doing a driver rebuild , the complete overhaul takes care of everything and its very easy to do.
unit need porter cable part #903789 complete overhaul kit

heres a little info on how they work
link removed
rwbil
Reply: Porter Cable FN250A Driver Not R...

rwbil

Let me add to my question. When I took the gun apart I could pull the cylinder up about 2" or so to the point the small holes were outside the main gun body. I did not want to use excess force to pull the cylinder out. Is the cylinder suppose to slide out out of the main gun easily? Also if I replace the bumber and can not slide the cylinder out do I force the bumber through the bottom of the cylinder or top of the cylinder? Any tool recommendation for removing cylinder and bumber and reinstalling.

Robert
rwbil
Reply: Porter Cable FN250A Driver Not R...

rwbil

The contents of these maintenance kits seems to be complete mystery. I can find no site that says exactly what is included. For 903789 / 60075 some sites say bumber included and other say order seperately. 90367 / 60030 I think is piston, gasket and bumber. Also say a 903756 / 60080, not sure what it contains. Does anyone know the exact breakdown of what is included in these kits. I do not want order a kit to find out the bumber or something else is not included.

Thanks,
Robert
rwbil
Reply: Porter Cable FN250A Driver Not R...

rwbil

I was able to remove the piston, but now have an additional question. Everything looks to be good shape. The seal can slide up and down. If I slide it all the way up the part 127 cylinder space sits on top of the seal and blocks the air holes. Is that were it sits. Or maybe the design is such that at certain points it is suppose to block and at certain points it is suppose to be below the air holes. Any info would be appreciated. I think I am first just going to disassemble clean and regrease. Any suggestion of the right grease to use.
DAVECAD
Reply: Porter Cable FN250A Driver Not R...

DAVECAD

As you may have already discovered, the Porter Cable FN 250A finish nailer is a huge POS!
I had shot approximately one hundred nails with mine when the Nose Cushion P/N 429 totally disintegrated. After about three hundred nails it would only fire once. I had to manually reset for each shot. Disassembled the gun and found that the Piston Bumper P/N 114 was a pile of crumbs. I don’t expect equipment to last forever but, with so little use? I would describe this as a “Toy”, not a “Tool”.
UtahAV
Reply: Porter Cable FN250A Driver Not R...

UtahAV

Sorry to hear that you have had such poor success with your gun. My experience with mine has been very different. I have owned a FN250a for around 10 years now and have had nothing but trouble free use. My gun is primarily used in a home woodshop but I have also installed trim in 3 basements, a family room and several bed rooms. It has not been used professionally by any means but it has definitely had some use. Out of curiosity, what brand of oil do you use when you lubricate the gun? That is the only thing I can think of that could cause the bumper to fail prematurely.

-UtahAV
-Mark
retired1
Reply: Porter Cable FN250A Driver Not R...

retired1

replaced all my bad seals along with the plastic piston stop, gun fired fine for about 30 nails then quit working. driver will fire once and then won't retract,pulling air hose off then manually pushing driver back there is air pressure against the driver so for some reason there is no air release after firing the gun, HELP any ideas
bulletpusher
Question: Porter Cable FN250A Nail Gun Kit...

bulletpusher

I so glad that I found this forum, looks like my kind of place. I've got a Porter Cable FN250A nail gun thats 10+ years old, with very light use and well cared for. The driver is not retracting all the way back now to pick up a nail, and I looked to find that the piston bumper is shattered inside. It also is leaking a little air out the trigger now, maybe related to piston not resetting? Do I just get the bumper or rebuild the whole thing. The manual shows a top kit -60028, and bottom-60009 but I think these have been changed. What I'm finding are Driver Maintenance Kit 60030 & 903767, and Overhaul Kit 903789. I can't seem to find a answer to, do these kit overlap, which is more complete. Sorry for my ignorance this is all new stuff, but I'm willing to learn. I don't fear taking anything apart. Thanks Robert
Mike
Reply: Porter Cable FN250A Nail Gun Kit...

Mike

Welcome bulletpusher. Usually the piston bumper is to blame when your driver isn't retracting, and since yours is shattered it's a good bet that replacing it will fix your problem (part #886122, $20.67). As for the trigger valve leak, it is probably unrelated to the driver retraction problem. There is a trigger valve assembly available to repair that problem (part #A08368, $28.40).

In the case of the FN250A you're in luck though, because the overhaul kit contains both the bumper and the trigger valve for $34.95 which is definitely what I'd recommend. The driver maintenance kit only contains the driver, compression ring, and bumper. Here's a link to the overhaul kit for your nailer:

Porter-Cable FN250A Overhaul Kit

I hope this helps!
bulletpusher
Reply: Porter Cable FN250A Nail Gun Kit...

bulletpusher

Thanks Mike for clarifying what the different kits contain, thats what I was unsure of. I look forward to "This old dog, learning a new trick." Thanks again
Moon
Reply: Porter Cable FN250A Nail Gun Kit...

Moon

Mike, your post of sometime back about the FN250A was extremely helpful to me . I ordered and received the overhaul kit. However there is no cylinder bumper in it. Should there be?
Thanks.

[QUOTE=Mike;2226]Welcome bulletpusher. Usually the piston bumper is to blame when your driver isn't retracting, and since yours is shattered it's a good bet that replacing it will fix your problem (part #886122, $20.67). As for the trigger valve leak, it is probably unrelated to the driver retraction problem. There is a trigger valve assembly available to repair that problem (part #A08368, $28.40).

In the case of the FN250A you're in luck though, because the overhaul kit contains both the bumper and the trigger valve for $34.95 which is definitely what I'd recommend. The driver maintenance kit only contains the driver, compression ring, and bumper. Here's a link to the overhaul kit for your nailer:

Porter-Cable FN250A Overhaul Kit

I hope this helps!"
Moon
Reply: Porter Cable FN250A Nail Gun Kit...

Moon

Mike, I was in error. The overhaul kit did have the bumber in it.
The plastic piston stop was shattered and I have ordered separately the piston stop.
Again, thanks for the excellent post.

[QUOTE=Moon;2873]Mike, your post of sometime back about the FN250A was extremely helpful to me . I ordered and received the overhaul kit. However there is no cylinder bumper in it. Should there be?
Thanks."
ncmike811
Reply: Porter Cable FN250A Nail Gun Kit...

ncmike811

Mike, in doing the re-assembly, does the check seal slide over the cylinder? If so, where should it rest on the outside of the cylinder? When the cylinder is inserted, the seal gets pushed up as the cylinder is seated, but I'm afraid it may be blocking the holes in the cylinder. Thanks.
cmoorejack
Reply: Porter Cable FN250A Nail Gun Kit...

cmoorejack

Hey Bulletpusher,
The check seal actually is supposed to cover the holes on the outside of the cylinder..[it helps diffuse the exhaust air..] the lip goes toward the top and the whole seal fits it the slot with the holes..make sure you install the cylinder spacer first and then slide the check seal up from the bottom of the cylinder and then reinsert the whole she-bang back into the tool..:)
Hope this helps..!
Craig
BillS2009
Reply: Porter Cable FN250A Nail Gun Kit...

BillS2009

I'm going to bring this thread back, I have an FN250A that the driver is not retracting. I have replaced the driver, and both bumpers. Still won't retract. Any ideas?
cmoorejack
Reply: Porter Cable FN250A Nail Gun Kit...

cmoorejack

Hey BILLS2009,
Try a little air tool oil on the o-rings..also try plugging in the air with the safety depressed and trigger engaged..[to 'reset' it]..You may have a o- ring or trigger problem..the best thing to do in this case is to install an overhaul kit..# 60075
it has all the o-rings and trigger assy..
hope this helps..?
cmoorejack
Jason2
Reply: Porter Cable FN250A Nail Gun Kit...

Jason2

I am new to this but sure could use some clarification. I received a Porter Cable FN250A for repairs (driver not returning). When I took the tool apart I found the bumper facing cone down towards the nose. I do not have a ton of P/C experience but I believe the cone is supposed to face up towards the driver.
Any clarification would help?
cmoorejack
Reply: Porter Cable FN250A Nail Gun Kit...

cmoorejack

Hey Jason2,
It is supposed to face up..sorry for the late response..hopefully you got your gun back up and going..:)
cmoorejack
Ayrton
Reply: Porter Cable FN250A Nail Gun Kit...

Ayrton

Bumping this old thread to keep all the relevant info in the same place.

My wife picked up a used FN250A for me, however it appears have a blown ring or seal. When firing, there is no pressure built up

I have read there are several overhaul kits, but I need to know what exactly is wrong before I can replace parts. I am sure I can figure all this out with a good dis-assembly diagram.

Thanks
mumford
Reply: Porter Cable FN250A Nail Gun Kit...

mumford

Hello, I'm trying to figure out why my fn250 (after a complete overhaul) still leaks air somewhere around the trigger. It works ok but it's driving me crazy. Thanks, Mumford
pforporter
Reply: Porter Cable FN250A Nail Gun Kit...

pforporter

[QUOTE=cmoorejack;4244]Hey Jason2,
It is supposed to face up..sorry for the late response..hopefully you got your gun back up and going..:)
cmoorejack"

Hey cmoorejack, I think it's really cool that ur willing to give of ur expertise. I go to so many of these forums or help sites where so many people only do it for a buck. Ur alrite,
pforporter ;) P.S. I to was putting a new piston stop, in my FN250A and had not seen where the check ring was when i pulled it apart. I wondered about where u said, but the way the diagram was laid out it wasen't very clear, thanks for that.
confusedagain
Reply: Porter Cable FN250A Nail Gun Kit...

confusedagain

ok read the threads ogf 2009 . so let me get this right when the drive rod doesn't return . it is because of the bumper seal ... well my rod doesn't return ... i have good pressure .i pulled the head off and the bumper seal was just fine .... small end of cone of bumper was facing down for the seal top fit around valve on the head. when i press the trigger some air comes out but not near when it was working .... what's going on ?
hadn't used it in a while and u said usually bumper seal at fault..... any ideas of my problem.....
Mine stopped working and it needs a driver blade ($65) and piston bumper at least, which cost $15 !! With an overhaul kit of $70, it's costing over $150 to maintain this one. That's too much. Other brands are far less for parts. Next time, I'm checking parts costs before buying. Porter Cable is a fail due to parts costs.
rb jr
Review: Porter Cable - FN250A
3 star
rb jr
I liked it until the cheap plastic parts inside broke.
CoolBlueGlow
Reply: Porter Cable - FN250A

CoolBlueGlow

Note to all of you having trouble with the upper piston bumper "shattering". The wrong lubricant will do this. The part in question is nylon - which is an excellent choice for this application, as long as you don't expose it to aliphatic or chlorinated hydrocarbon solvents. If you do, it's toast. That's not the tool's fault. That's user error. Use only the proper air tool oil, The proper air tool oil is NOT WD-40, Marvel Mystery oil, and especially not spray cans of anything, like carb or brake cleaner, ( I know, but you'd be amazed at what folks spray in their air tools, thinking they are "helping it work better".) Also, I'd avoid the cheap Chinese oil from Harbor Freight. Just buy the right stuff. It only takes 2 or 3 drops every use.
Accessories
Accessories for the FN250A

Maintenance Kits:
See more maintenance kits 
903789
Overhaul Kit (Order Piston Bumper p/n 886113 Seperately)
$75.32

903767
Driver Maint Kit
$69.63

fancyboxy