I have a problem with an ac drive Cesab Blitz / BT cargo electronic park brake.
When the machine stops it holds on the park brake then will release and roll for about 2 seconds until the hydraulic motor stops then the brakes apply again.
I checked the stop on ramp setting and that was active
I swapped the park brake release pump from a good truck still the same.
I also swapped the brake solenoid and valve no improvement.
I am wondering if it's a mechanical problem with the park brake I can see the axles have been apart due to amount of sealant around the joints.
Customer had no t noticed a problem until a trainer came in.
Any ideas please.