Part Location Diagram of 897389 DeWALT O-RING
See part 129 in the diagram
( Grid squares measure 1x1 inch )

O-RING 897389

Manufactured by:
DeWALT
ERP Number:
ERP18987852
Part Number:
897389
Original Equipment Manufacturer ?
$6.16
On Order
Minimum Quantity of 2 required

Easy 

Less than 15 mins 

(2 rated repairs) ?

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Product Description

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O-rings are made to contain thousands of PSI pressure by creating a seal between two or more parts. O-ring measurements are specified by the inside diameter and the thickness. Of the many causes for O-Ring failure, the most common among power tools are: • <u>Extrusion and Nibbling</u> - O-ring has ragged, tattered edges. These are commonly caused by pressure spikes which shear off tiny "bites" from the o-ring, or caused by clearance gaps. • <u>Abrasion</u> - One or both sides of the o-ring appear rough and slightly flattened. Commonly caused by a contact surface that it too rough, contains grit or is too smooth to allow lubrication. • <u>Over Compression </u> - O-ring is flattened on both sides and may have a "ring" split along its length. Commonly caused by excessive pressure or heat. • <u>Heat Hardening</u> - O-ring has a pitted or cracked surface, and often is flattened on both sides. Caused by temperature exceeding o-ring capacity. • <u>Weather/Ozone Cracking</u> - O-ring is covered in small surface cracks. Caused by exposure to ozone, UV rays and air pollution. Excessive seal stretching causes similar cracking.

Troubleshooting

This part works with the following brands:
  • Porter Cable
This part works with the following products:
  • Nailer
Part# 897389 replaces these:
897389,

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Customer Repair Instructions

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Easy 

Less than 15 mins 

(2 rated repairs) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

Replaced internals.

Dennis from Chesapeake, Virginia

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
910771, 910769, 910767, 908928, 897389, 897387
Remove 4 Allen bolts on the back. Replace o-rings. and other parts. Reinstall the same way it came apart. Oil all parts. Works like new.
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leaked air

Bobby from Ely, Minnesota

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Nutdriver
Parts Used:
910769, 897389
removed piston and replaced o rings
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  • 1