Park brake adjustment .
if your lever is all the way up and you can't get it to hold you may have to adjust on the caliper.
Back cable adjuster till it's completely loose .
Go to the rear caliper (also check pads are in spec before proceeding )
remove nut and helper spring.
Turn the actuator in the direction that brakes are applied till it stops . Reinstall arm back to the closet position towards rear of machine . Reinstall nut and spring
Go back to brake lever adjuster and adjust till it just contacts on first click . Wheels should lock up good by the 3rd click .