VALVE PLATE ASSY. AB-A640050
- Manufactured by:
- DeWALT
- ERP Number:
- ERP18991033
- Part Number:
- AB-A640050
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Need help finding your model number?Product Description
?This is a genuine Bostitch replacement part, it is sold individually. The purpose of the Valve Plate is to allow into the cylinder.<br<When the piston is being pulled down the reeds on the Valve Plate are closed and air is building up in the cylinder. Once the piston starts traveling up the reeds on the Valve Plate open and air is sent into the air tank. Overtime the reeds will become worn and the Valve Plate will need to be replaced. This is also a good time to replace the head gaskets.
Frequently Purchased Together
?Troubleshooting
- Bostitch
- Compressor
Customer Part Reviews
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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.
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Compressor didn\'t hold pressure above 20psi
John from Marblehead , Massachusetts
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- AB-A650300, AB-A640050
2. Unscrewed the cylinder head - immediately saw the broken reed valve.
3. Replaced the reed valve and the gasket that seemed compromised when taking off the cylinder head.
4. Put it back together.
Compressor would pump to 20 psi and no more
Gary from Lakeland, Florida
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 30 - 60 mins
- Tools:
- Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050
Installed new valve plate assembly and new gaskets.
Compressor works as should pumping to 130 psi.
Valve plate had a broken piece on the valve
Philip from Cloudcroft, New Mexico
- Difficulty Level:
- Easy
- Total Repair Time:
- 30 - 60 mins
- Tools:
- Screw drivers, Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050, AB-9412204
2. I replaced with the new valve plate assembly.
3. Placed new cylinder head gasket on the new plate.
4. Then replaced all the components of the cylinder head.
5. Pulled the broken quick coupling and replaced with the Quick Coupling 1/4in M.
Make sure to pu ... Read more t thread sealant on the quick coupling. Good luck.
Compressor would not build up air when running.
John from Richmond, Kentucky
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers, Socket set
- Parts Used:
- AB-A640050, A631040
Small metal reed valves had failed. Compressor would only pump to 65 PSI.
Tim from East Palestine, Ohio
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers, Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050, AB-9038193, AB-9007013, AB-9007012
2. Removed 2 screws and 2 bolts with the nuts that secure the cylinder head.
3. Removed the cylinder head to replace the damaged valve plate assembly.
4. Removed the intake reed valve from the top of the piston and replaced with the new part.
5. ... Read more Installed the new gasket between the valve plate and the head.
6. Reinstalled the bolts and the screws that hold the head and the torque.
7. Removed one screw on the piston rod and installed the new cooling fan.
8. Reassembled the cover and test ran. All worked fine.
Compressor not building pressure
luke from morganville, New Jersey
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- More than 2 hours
- Tools:
- Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050
Removed one air line and 4 bolts & nuts to inspect piston / valve plate.
Found valve plate damaged.
Ordered parts & replaced valve plate along with new gaskets on either side.
Reassembled all previously removed parts, operational & leak checks good.
Once parts ... Read more were in hand, actual time of repair was less than 30 minutes. Original troubleshooting and parts ordering process.
During my basement remodel, my Bostitch air compressor quit building up pressure. It sat idile for 3 years. Bought another inexpensive compressor but ccouldn\\
Richard from Windsor, Colorado
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 30 - 60 mins
- Tools:
- Nutdriver, Screw drivers, Wrench (Adjustable), Wrench set
- Parts Used:
- AB-A650300, AB-A640050
Compressor would not hold any air
Roberto from Belvidere, Illinois
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- AB-A640050
2 Removed four allen screws from cylinder head
3 Removed and replaced air valve plate assembly
4 Replaced cylinder head
5 Replaced plastic cover and handle
6 Tested compressor and verified function
7 Overall about 10 minutes to fix
Reed valve broke
Brian from Medford lakes, New Jersey
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers, Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050
Valve was broken.
Stephen from Coon Rapids, Iowa
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers, Socket set, Wrench set
- Parts Used:
- AB-A650300, AB-A640050
2. Disconnected the air line.
3. Removed the cylinder head.
4. Replaced the valve plate and the head gasket.
5. Reassembled the compressor.
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