Porter Cable
Power Hammer

Model # 639 Official Porter Cable rotary hammer

Here are the diagrams and repair parts for Official Porter Cable 639 rotary hammer, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 106 parts  |

O-ring 1257776
#150

Rotary hammer diagram

O-ring

Part #1257776

The manufacturer no longer makes this part, and there's no substitute part

Guide Pin 1257767
#141

Rotary hammer diagram

Guide pin

Part #1257767

The manufacturer no longer makes this part, and there's no substitute part

Ball Set With Retainer 1257872
#19

Rotary hammer diagram

Ball set with retainer

Part #1257872

The manufacturer no longer makes this part, and there's no substitute part

Washer 1257883
Washer

Part #1257883

The manufacturer no longer makes this part, and there's no substitute part

Cord 1257712
#5

Rotary hammer diagram

Cord

Part #1257712

The manufacturer no longer makes this part, and there's no substitute part

Spring Ring 1257757
#131

Rotary hammer diagram

Spring ring

Part #1257757

The manufacturer no longer makes this part, and there's no substitute part

Chuck Collar, Incl: 108, 109 1257736
#110

Rotary hammer diagram

Chuck collar, incl: 108, 109

Part #1257736

The manufacturer no longer makes this part, and there's no substitute part

Idler Shaft 1257721
#40B

Rotary hammer diagram

Idler shaft

Part #1257721

The manufacturer no longer makes this part, and there's no substitute part

Wobble Assembly 1257771
#145

Rotary hammer diagram

Wobble assembly

Part #1257771

The manufacturer no longer makes this part, and there's no substitute part

Brush 1257652
#3

Rotary hammer diagram

Brush

Part #1257652

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty
Time required
 45 minutes or less

Articles and videos for gas walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

How to remove a lawn mower blade using a removal tool

How to remove a lawn mower blade using a removal tool

Learn how a blade removal tool makes replacing the blade easier and safer…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…