How to Rebuild Carburetors for Farm Tractors
The carburetor on a farm tractor can be as simple as the one on a lawn mower or as complicated as the one on an automobile. Tractors often operate under extreme conditions and sometimes all that is necessary is to give the carburetor a thorough cleaning. If you have good mechanical skills you should be able disassemble, clean, replace worn parts and reassemble a tractor carburetor. Does this Spark an idea?
Other People Are Reading
Things You'll Need
- Basic mechanic's tools
- Cleaning solvent
- Stiff brush
- Large dishpan
- gasket set and/or rebuild kit
Instructions
-
Disassembly
-
1
Obtain an exploded diagram of the carburetor. This can sometimes be found in the service manual for the tractor, but is most often found in the parts catalog for the carburetor itself. This diagram can guide you during disassembly and will be very valuable during reassembly.
-
2
Remove the carburetor from the tractor and disassemble it. Put small parts, nuts and bolts in paper cups in the order that you removed them. Make sketches of the orientation of a part before you remove it.
-
-
3
Carefully remove gaskets and seals and save them as patterns in case new ones are not available.
Cleaning and Evaluation
-
4
Clean all of the parts, a few at a time, so that they can be replaced in order in their paper cups. The best way to clean small parts is with a small stiff brush and kerosene or a commercial cleaning solvent. Do this in a dishpan or similar container.
-
5
Examine all parts for breakage or wear. Your exploded diagram will help you determine if any parts are missing.
-
6
Obtain a gasket set and any necessary parts from your tractor dealer or from the manufacturer of the carburetor.
Reassembly
-
7
Reassemble the parts of the carburetor in the reverse order you disassembled them, replacing any worn parts with new ones.
-
8
Use a new set of gaskets if one is available. If not, using the old gaskets as patterns, make new ones from similar material.
-
9
Confirm that all of the moving parts are functioning correctly. The best way to test the float valve is to blow through the fuel inlet. You should be able to hear air passing through. Now, turn the carburetor upside down and blow. Air should not be able to pass through the valve.
-
10
Reinstall the carburetor on the tractor, connect the fuel line and attach the throttle and/or governor linkage.
-
1
Tips & Warnings
Cleanliness is very important. The smallest bit of foreign matter can prevent the flow of fuel through a carburetor.
Do not use gasoline as a cleaning solvent.
Be sure to work in a well-ventilated area when cleaning parts with solvent.
