Frequently Asked Questions

Q. What information does Hayes require to specify a flywheel coupling?

A. Download this PDF for instructions. Click here to View Specification Sheet

Q. Do I need to test the coupling in my application before it is approved?

A. We emphasize that the data contained herein should be used as a guide only and is based primarily on laboratory tests. The information provided does not take into account all variables that can be encountered in actual use. Therefore, it is advisable to test the material under actual service conditions before specification. If this is not practical, tests should be devised that simulate your service conditions as closely as possible.  Click here to View Warranty

Q. How can I check the Run-Out between my flywheel and engine housing?

A. Mount indicator and manually turn over engine. Click here to View Instructions

Q. How do I check the alignment between my engine bell housing and flat face flywheel?

A. Mount indicator and manually turn over engine.  Click here to View Instructions

Q. How do I check the alignment between my engine housing and SAE flywheel?

A. Mount indicator and manually turn over engine. Click here to View Instructions

Q. How do I check the alignment between my flywheel and pump mounting plate?

A. Mount indicator and manually turn over engine. Click here to View Instructions

Q. How do I check the alignment between my rear face of block and flat face flywheel?

A. Mount indicator and manually turn over engine.  Click here to View Instructions

Q. How do I determine what SAE Flywheel I have?

A. The attached document should help you out. Click here to View Chart

Q. How do I determine what SAE Housing I have?

A. The attached document should help you out. Click here to View Chart

Q. How do I determine what SAE pump I have?

A. The attached document should help you out. Click here to View Chart

Q. What is the Warranty

A. Download this PDF for details on our warranty. Click here to View Warranty