My Apollo front brake is not applying enough pressure to my swivel tires and therefore isn't holding my cart. What could be the problem?

If the brakes are not applying enough pressure on the tire, it is most likely related to insufficient air pressure. Check that all tires (both 10 In. and 8 In.) are inflated to 50 PSI. Check your tires air pressure periodically, especially if your cart has not been in use for awhile.