A clean torque converter is crucial for optimal kart performance. A dirty or poorly maintained torque converter can lead to sluggish acceleration, reduced top speed, and even premature belt failure. This guide provides a step-by-step approach to Cleaning A Torque Converter, ensuring your kart runs smoothly and efficiently.
Disassembling the Torque Converter
Before cleaning, the drive clutch must be removed from the engine. This typically involves removing a bolt on the motor’s output shaft using an impact wrench. Once removed, carefully disassemble the clutch assembly. Note the orientation of components for proper reassembly. Separate the outer cover, hub, bronze bushing, and spring pack assembly. If the spring pack is difficult to remove, a flat-blade screwdriver can be used as a wedge.
Inspecting for Wear and Tear
After disassembly, thoroughly inspect all components for wear and damage. The aluminum spring pack assembly should have two springs that extend fully when unhooked, with both pins securely in place. Check the bronze bushing for cracks. Examine the main assembly and hub for excessive side-to-side play, which indicates significant wear. Wobble in the clutches often signals the need for replacement.
Cleaning the Components
Thorough cleaning is essential. A wire wheel on a bench grinder is ideal for cleaning the hub. Use a wire brush, and potentially a rat tail file or diamond bit chainsaw sharpener, to clean debris from the splines in the main assembly. The belt-riding surfaces of the clutches must be smooth and free of rust and pitting. A wire wheel, sandpaper, or a pneumatic sanding wheel can be used for this purpose. The hub should drop freely through the assembly when clean.
Reassembling the Torque Converter
Reassembly requires careful attention to detail. Place the spring pack assembly back into the main drive clutch with the flat side down. A flat-blade screwdriver or a piece of wood can assist with this. Reinstall the bronze bushing onto the backplate and then the hub, ensuring the ridged side faces up.
Lubrication: Less is More
Torque converters are dry assemblies and generally require minimal lubrication. A dry moly lubricant can be applied to the inner surface of the outer cover where the aluminum piece makes contact. Avoid wet lubricants, as they attract dirt and debris, hindering performance.
Reinstalling the Drive Clutch
Reinstall the clutch onto the kart, starting with the backplate and bronze bushing, followed by the main drive clutch with the beveled side first. Secure the assembly with the bolt, lock washer, and flat washer, tightening it firmly with an impact wrench or box end wrench while locking the washer.
Driven Clutch Maintenance
The driven clutch, located on the jackshaft, requires less frequent cleaning. Typically, spraying with brake cleaner and ensuring the belt contact surfaces are clean is sufficient. Disassembly of the driven clutch is more complex and should be avoided unless necessary.
Belt Selection and Maintenance
Choosing the correct belt is crucial. Factors like clutch type (Series 20 or 30), driven clutch diameter (6″ or 7″), and center-to-center distance between clutches determine the appropriate belt. Refer to a belt size chart for accurate selection. A worn or improperly sized belt will negatively impact performance. Regular cleaning and proper belt selection are vital for optimal torque converter performance.
Conclusion
Cleaning a torque converter is a crucial maintenance task for any kart owner. By following these steps and performing regular maintenance, you can ensure your kart operates at peak performance and prolong the life of your torque converter. Remember to consult manufacturer guidelines for specific recommendations and always prioritize safety.
