Revox Replacement Belt A77 B77 PR99 Mk1 G36 Series II III Reel Counter

hello welcome to service class with GB audio today on the bench I've got a Reeve oxb 77 reel-to-reel tape machine it's got a very common problem the tape counter here isn't moving machine or works otherwise but the counter is broken the main cause for this is usually the drive belt which runs from the take-up spool to the counter it's very straightforward to replace and I'm going to show you how to do that the tools you'll need are small posi Drive medium posi Drive and a flat screwdriver the first thing we need to do is to remove the mains power for safety then we can remove the head block cover we need to unscrew the pinch roller which then just lifts off and pull off the very speed controller if it's a mark 1 version there wouldn't be a very speed so don't worry about that then there are 5 screws here to hold the panel on we need to remove all of these if we slide this little lever a