Caterpillar 137-6603 Aluminum Spool Component is an original Caterpillar part (OEM) identified by part number 137-6603, featuring an aluminum spool design. This catalog entry confirms it as a dedicated spool component intended for Caterpillar equipment that specifies 137-6603. As an OEM aluminum spool, it carries Caterpillar engineering for compatibility with the equipment it is designed to serve.
