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 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

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

Bumper A341-21
#21

Pneumatic brad nailer, 18 gauge diagram

Bumper

Part #A341-21

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

Scale Board A349-05
#67

Pneumatic brad nailer, 18 gauge diagram

Scale board

Part #A349-05

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

Spacer A290-14
#43

Pneumatic brad nailer, 18 gauge diagram

Spacer

Part #A290-14

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

Screw A200-09
Screw

Part #A200-09

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

Handle Grip A312-04
#69

Pneumatic brad nailer, 18 gauge diagram

Handle grip

Part #A312-04

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

O-ring 24.5-3 A311-B9
#78

Pneumatic brad nailer, 18 gauge diagram

O-ring 24.5-3

Part #A311-B9

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

Symptoms for gas ranges

Main causes: gas supply problem, faulty pressure regulator, clogs in burner or orifice, control system failure, faulty t…

Main causes: burner igniter switch failure, bad spark module, dirty or damaged spark electrode, wiring failure…

Repair guides for gas ranges

How to replace oven door hinges on a gas range

How to replace oven door hinges on a gas range

See how to replace the oven door hinges on a gas range yourself, in just 30 minutes.…

Repair difficulty
Time required
 15 minutes or less
How to replace a range spark igniter switch

How to replace a range spark igniter switch

Follow these steps to replace the spark igniter switch—sometimes called a burner switch or spark switch—on a gas or dual…

Repair difficulty
Time required
 60 minutes or less
How to replace a gas range oven control board

How to replace a gas range oven control board

These step-by-step instructions explain how to replace an oven control board on a gas range…

Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas ranges

5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

Get tips on completing essential holiday cleaning tasks to brighten your home.…

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…