HPA Monon Corp, a manufacturer of dry van trailers and converter dollies, has made Stemco's Platinum Performance System as its factory-standard wheel end. This wheel-end package includes the Guardian HP seal, Pro-Torq safety nut system, and Sentinel hubcap.
The Guardian HP seal has been HPA Monon's standard wheel seal since March 1999. This seal has been developed for protection and greater sealing with its sealing lip and contamination exclusion. The Pro-Torq system eliminates variability in wheel bearing adjustment, which extends maintenance intervals. The Sentinel keeps contaminants out of wheel-end lubricant with a two-way check valve constructed with PTFE filter.