Replace Brake Switch on SA324

[dlh6213]

Can anyone explain how to replace the brake switch on a Yanmar SA324 (2017)? I've been having trouble with it for awhile; I by-passed the seat switch (so at least it wouldn't die every time I got out of the seat - which is very often). By-passed the forward pedal because that seemed to be at least part of the problem, and hooked up a remote starter. But finally took it in to the dealer (a 4 hour round-trip for me) when the PTO stopped working. They said they replaced the PTO switch and the brake switch, and the forward pedal was indeed sticking (didn't return to the neutral position as it should). They lubed that up, and it helped but it still sticks frequently. Anyway, after I got it back, it worked fine the first day, but the second day I had to press the brake really hard to get it to allow me to start. And by the 3rd day, I had to hold the key on while pumping the brake hard until it eventual started, but it is taking more and more pumps every time, so I know it won't be long before it goes out completely. I'd rather not make another 4 hour trip to the dealer, and my truck is currently in the shop anyway (heater core), so I'd like to just replace it myself, but haven't been able to find any instructions for doing so.