…on one of them the bolt (the one with ratchet-type notches around the head) which goes through the arm and into the rectangular device has broken in two. Can you supply a replacement bolt please, for what is otherwise a perfectly good piece of equipment?
There is available a screw pack for the TS1500 which contains spares of all fixings etc. used on the closer, and contains the bolt you are describing. The packs are £3.00 each + VAT and you’ll have to contact the office to order as they’re not on the web site!