Makita
Power Nailer

Model # AF503 Official Makita pneumatic brad nailer

Here are the diagrams and repair parts for Official Makita AF503 pneumatic brad nailer, 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 79 parts  |

Hex Wrench 783201-2
#401

Pneumatic brad nailer, 18 gauge diagram

Hex wrench

Part #783201-2

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

Hex Wrench 783202-0
#402

Pneumatic brad nailer, 18 gauge diagram

Hex wrench

Part #783202-0

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

Body I22N-08
#23

Pneumatic brad nailer, 18 gauge diagram

Body

Part #I22N-08

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

Compression Spring A210-61
#64

Pneumatic brad nailer, 18 gauge diagram

Compression spring

Part #A210-61

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

Step Pin 5-27.3 A206-65
#76

Pneumatic brad nailer, 18 gauge diagram

Step pin 5-27.3

Part #A206-65

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

O-ring 11-1.05 A311-A2
#29

Pneumatic brad nailer, 18 gauge diagram

O-ring 11-1.05

Part #A311-A2

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

Air Seal A343-29
#6

Pneumatic brad nailer, 18 gauge diagram

Air seal

Part #A343-29

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

Tail Cover A235-AO
#25

Pneumatic brad nailer, 18 gauge diagram

Tail cover

Part #A235-AO

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

O-ring 22-1.5 A311-OQ
#79

Pneumatic brad nailer, 18 gauge diagram

O-ring 22-1.5

Part #A311-OQ

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

Conical Spring A210-AO
#31

Pneumatic brad nailer, 18 gauge diagram

Conical spring

Part #A210-AO

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

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

Main causes: punctured tire, damaged rim…

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case…

Main causes: dirty carburetor, stale fuel…

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

How to replace snowblower skid shoes

How to replace snowblower skid shoes

To prevent damage to your snowblower auger, replace the skid shoes when both sides of the shoe are worn. It's an easy re…

Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower auger drive cable

How to replace a snowblower auger drive cable

A loose or snapped auger drive cable can prevent the auger from rotating. Follow this step-by-step guide to replace the …

Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower electric starter

How to replace a snowblower electric starter

Replace the electric starter on your snowblower if it doesn't work.…

Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas snowblowers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

How to make your snowblower last longer

How to make your snowblower last longer

Learn the steps to take to adjust and maintain your snowblower so it lasts longer.…

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…

Snowblower chute won't turn: troubleshooting chute control and gearbox problems video

Snowblower chute won't turn: troubleshooting chute control and gearbox problems video

Learn how to replace the chute control assembly and gearbox if the chute on your snowblower won't turn.…