Part Location Diagram of AC-0781 DeWALT O-RING
See part A-7 in the diagram
( Grid squares measure 1x1 inch )

O-RING AC-0781

Manufactured by:
DeWALT
ERP Number:
ERP18991071
Part Number:
AC-0781
Original Equipment Manufacturer ?
  Works with your model  D55167!
In Stock
Delivers in 3-5 Business Days!
Minimum Quantity of 2 required

Easy 

15 - 30 mins 

(26 rated repairs) ?
  Works with your model   D55167!

Product Description

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This is an OEM part supplied directly from manufacturer. This part is guaranteed to fit compressors listed below to provide a seal on the interconnecting tube and lines. This part is made out of high quality rubber with the following dimensions .362ID X.103W. It is recommended to replace to maximize the power of your compressor. This part is sold individually.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Craftsman
  • DeWALT
  • Black and Decker
  • Porter Cable
  • DeVilbiss
  • Bostitch
  • Stanley
This part works with the following products:
  • Compressor
Part# AC-0781 replaces these:
AC-0781, PAC-0781,

Customer Part Reviews

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4.3
Average Rating (out of 5):
★★★★★
★★★★★
(6 Reviews)
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Questions & Answers

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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.

Easy 

15 - 30 mins 

(26 rated repairs) ?
  • 1
  • 2
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outlet tube cracked

james from westerly, Rhode Island

10 of 10 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Wrench set
Nothing special take tube off put nuts on new tube then o-ring , and tighten it back in place simple thank you for having the parts I needed. Planing on other repairs now I know where to get parts.
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Hole in the tube.

charles from LINCOLN, Arkansas

4 of 4 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Wrench set
Parts Used:
SSP-7812, AC-0781, A16998
Put the tube in and tighten the nuts.
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Tube broke.

Kathi from Central Point, Oregon

4 of 4 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Wrench set
Parts Used:
SSP-7812, AC-0781, AC-0780, A16998
Removed the existing assembly and reinstalled with the new.
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Compressor was leaking air from outlet tube

Michael from MILTON, Vermont

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
AC-0781, A16998
Unplugged compressor
Removed plastic cover
Removed outlet tube
Replaced outlet tube , and new compression fitting
Put cover back on and ran compressor to test fix
Compressor working great
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Pressure switch went bad caused it to not shutoff.

Kevin from McDowell, Virginia

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Socket set, Wrench set
Parts Used:
AC-0781, AB-9063158, A16998
Took off shroud around the electric motor and compressor. Removed the pressure switch and outlet tube. Reinstalled with the new parts. Then replaced shroud.
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The outlet tube was corroded through by the nut.

Walter from Griswold, Connecticut

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
SSP-7812, AC-0781, N034159, A16998
I removed the broken check valve and outlet tube. Replaced the new parts. Easy fix.
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The outlet tube was broken

Luis from Gaithersburg , Maryland

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench (Adjustable)
Parts Used:
SSP-7812, AC-0781, AC-0780, A16998
1. Removed the plastic cover.
2. Removed the old outlet tube.
3. Threaded the new outlet tube.
4. Make a test for air leaks.
5. Reattached the plastic cover.
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No pressure in tank and compressor running constantly

Robert from Pflugerville, Texas

2 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Wrench set
Parts Used:
AC-0781
Remove three screws on the compressor cover and pry cover apart. Removed the feed pipe from the compressor to tank and replaced the compressor side o-ring which had disintegrated. I coated the compressor with Vaseline and reinstalled.

It took me about 15 or 20 minutes to get the plastic compressor cover off and 5 minutes to replace the o-ring.
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Broken outlet air tube

joe from Kansas City, Missouri

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Screw drivers, Wrench set
Parts Used:
SSP-7812, AC-0781, AC-0780, A16998
Remove both Wheels to gain access to the shroud around the compressor once both shroud halfs are off the air outlet tube nuts are visible loosen nuts remove tube take notice where the o-ring is located.
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Parts wore out

mark from CORWITH, Iowa

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Wrench set
Parts Used:
AC-0781, 1000002673
replaced the check valve and took the compresser head off and replaced o-rings
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Model Cross Reference

This part works with the following models:
ERP Number: ERP18991071
Manufacturer Part Number: AC-0781
Brand Model Number Description
DeVilbiss 1WC94 Compressor - Construction Compressor
DeVilbiss 1WC95 Compressor - Workshop/Auto Compressor
Black and Decker 919-16561 Compressor - 7.0 Horse Power 60 Gallon Compressor
Black and Decker 919-16670 Compressor - 3.5 Horse Power 20 Gallon Compressor
Craftsman 919-16755 Compressor - Compressor
Black and Decker 919-16760 Compressor - Compressor
Black and Decker 919-16761 Compressor - Compressor
Black and Decker 919-16762 Compressor - Compressor
Black and Decker 919-16762-C Compressor - Compressor
Black and Decker 919-16763 Compressor - Compressor
Craftsman 919-16770 Compressor - Compressor
Craftsman 919-16771 Compressor - Compressor
Craftsman 919-16777 Compressor - A 3.5hp 20g Vp Tv 2stg 12
Black and Decker 919-16778 Compressor - 3.5 Horse Power 25 Gallon Compressor
Craftsman 919-16779 Compressor - A 3.5hp 25g Hp Tv 2stg 12
Craftsman 919-72427 Compressor - A 7.0hp 60g Vs Tv 2stg 24
Black and Decker 919-72550 Compressor - 3.5 Horse Power 25 Gallon Compressor
Craftsman 919-72850 Compressor - A 3.5hp 20g Vp Tv 2stg 12
Craftsman 919165610 Compressor - Air Compressor
Craftsman 919165611 Compressor - Air Compressor
Craftsman 919165612 Compressor - Air Compressor
Craftsman 919165613 Compressor - Compressor
Craftsman 919166700 Compressor - Air Compressor
Craftsman 919166701 Compressor - Air Compressor
Craftsman 919167600 Compressor - Air Compressor
Craftsman 919167610 Compressor - Air Compressor
Craftsman 919167620 Compressor - Air Compressor
Craftsman 919167621 Compressor - Air Compressor
Craftsman 919167630 Compressor - Air Compressor
Craftsman 91916770 Compressor - Compressor