Shop Roller Shutter Repair Chester

We recieved a call from Sostrene Grene, Chester, CH11ER…On attending the shop we removed the service hatch to gain access. We noticed the limit collar is slipping within the barrel so we installed 3 x rivits and reset the limits. We put a black mark on the guide where the top limit stops and explained to the manager and asked her to keep I eye on mark.  If the limits keep slipping it will need a new 150nm motor.