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Crankshaft – Part Number: 36-17-0305
Crankshaft
$7.72
On Order
Fix Number
FIX17016652
Manufacturer Part Number
36-17-0305
This replacement part is supplied directly from the original equipment manufacturer. It is specially designed for Milwaukee ratchets. The crankshaft is part of the mechanism that drives the anvil. It is driven by the gear on the end of the armature. Over time the part may wear out or get damaged eventually requiring a replacement to ensure the unit is functioning properly. Keep in mind this high-quality crankshaft is made of durable metal and is sold individually. Refer to the diagrams of your model for the correct installation of the new part.
Rotor Blade – Part Number: 864234
Rotor Blade
$10.02
On Order
Fix Number
FIX10304441
Manufacturer Part Number
864234
This part is an OEM from Cleco for use in nutrunners, grinders, and drills. The rotor blade attaches to the rotor and is made out of metal. If it becomes broken it will need to be replaced and may require a nutdriver during the installation. Keep in mind this high-quality part is sold individually.
Valve Seat – Part Number: 131-303
Valve Seat
$22.31
In Stock
Fix Number
FIX12094975
Manufacturer Part Number
131-303
This is an original part from Ingersoll Rand. The valve seat is compatible with several impact wrenches, allowing the valve to be secured onto the housing interior. A wrench is often necessary for the replacement, and the valve seat is sold individually.
O-ring – Part Number: A082777
O-ring
$6.51
In Stock
Fix Number
FIX10299731
Manufacturer Part Number
A082777
This O-ring fits air tools like hammers, sander polishers, and ratchets, providing a seal for the valve. With time and use, this part can shrink, crack and become brittle. In this case, it is important to replace the O-ring to prevent air leaks. *Please note: this part is sold individually. Refer to the diagram provided by the manufacturer for installation instructions and safety practices.
Throttle Valve – Part Number: KF125190
Throttle Valve
$6.51
In Stock
★★★★★
★★★★★
2 Reviews
Fix Number
FIX10301921
Manufacturer Part Number
KF125190
Genuine Chicago Pneumatic replacement part, this item is sold individually. This part acts as as a seal so that air will not leak out of the throttle assembly on the tools shown below. Over time it will become brittle and crack. It is a good Idea to keep an extra one on hand.
Anvil Service Kit – Part Number: 42-06-1030
Anvil Service Kit
$48.35
On Order
Fix Number
FIX11877804
Manufacturer Part Number
42-06-1030
Plug-throttle Valve – Part Number: KF134162
Plug-throttle Valve
$6.51
On Order
Fix Number
FIX10302052
Manufacturer Part Number
KF134162
The throttle valve plug fits next to the o-ring and the throttle spring and helps to cover the throttle valve. It is available as an individual replacement part and is made of plastic. This genuine item is supplied by the original equipment manufacturer for use with Chicago Pneumatic ratchets. A set of pliers and a screwdriver may be required to replace this plug if it becomes broken.
Spring-Throttle – Part Number: KF124390
Spring-Throttle
$6.51
In Stock
Fix Number
FIX10301854
Manufacturer Part Number
KF124390
This item is a genuine Chicago Pneumatic replacement part that has been sourced from the original manufacturer. The metal spring is used with pneumatic ratchets. This item is part of the throttle valve assembly and is used to provide compression for the valve when the throttle button is pressed. This item is available as an individual replacement part.

Installation Instructions

Thomas from OLMSTED FALLS, OH
Air rachet running at full speed
Removed the screw opposite of the throttle lever. Installed throttle valve with existing spring. The old throttle valve was plastic and disintegrated. It took less than 5 minutes. The rachet now works perfectly. Read more...
Vanes – Part Number: 301-42-4
Vanes
$22.31
On Order
Fix Number
FIX12095714
Manufacturer Part Number
301-42-4
A pneumatic tool that runs slowly or loses power may have worn rotor vanes. This replacement pack contains four vanes used inside the air motor of select grinders and ratchets. Each vane slides within the rotor while compressed air creates the force needed for rotation. Replacing the complete set helps maintain balanced contact inside the motor. Before ordering, verify the tool model and review its parts diagram. Shut off and disconnect the compressed-air supply, then release any stored pressure. Keep internal surfaces clean during service, check the cylinder for scratches, and place each vane in the direction shown by the manufacturer before reassembly.
Switch Assembly – Part Number: 23-66-3020
Switch Assembly
$75.52
In Stock
Fix Number
FIX11877356
Manufacturer Part Number
23-66-3020
A cordless ratchet that will not start or cuts out during use may have a worn switch assembly. The unit combines the trigger switch, control electronics, and battery connection to manage motor operation and variable speed. First test with a known-good battery and inspect the terminals, motor, and internal wiring. Match the replacement to the full tool model because similar assemblies may use different connectors. Remove the battery before service, keep small parts organized, and route each wire through its original guide. Test the trigger only after the housing is fully secured.

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