McDonald's grills and fryers are the foundation to their business.
If you decide to begin servicing food equipment in McDonald's, some training will open some doors for you. Their equipment can be intimidating to work on with all of the electronics designs incorporated to "dummy proof" their cooking operations.
Most of my McDonald's use Garland grills. Training I received to perform their annual grill recertifications was the roving course set up through local authorized service companies. My company hosted them several times. It was a day long course and is required to do the recerts. on the grills. Very good operational theory for troubleshooting too.
I don't touch their Taylor equipment. Can't get any support if not their authorized service provider and training is a MUST to become that. My company just never opened that door.
Frymasters dominate most McDonald's spaces with more than just their fryers. Yet, Pitco and even Henny Penny FRYERS can be found out there.
Frymaster's training course in Shreveport LA was a very comprehensive, week long course eight years ago. It covered ALL the McDonald's stuff and their NON-McDonald's models as well as their Dean fryers and the Varimixer. I've also been to their roving classes, so they're out there. Length of those courses varied. Frymaster's tech support is ranked among the best that I deal with.
Frymaster's LOV fryer, which are slowly moving into McDonald's stores, offers some challenges. I personally need some refresher training on those since I haven't touched one yet. More electronics engineered into them for the oil management system.
Never touched their Henny Penny's, but the Pitco are the PITA to work on. They have some convoluted electrical/electronic operational designs. Seemed funny to me that Pitco toted their SOLSTICE fryers as the technician's dream when entering the market ten years ago. Now, with all the accessories added, they can be a real head-scratcher on replacing some of their parts. Their tech support is good too, but at times NOT as good as Frymaster. Not sure about availability of training for those or the Henny Pennys.
In any case about availability of training, some if not all of their websites will have information on finding training or getting it set up in your area. Might take some phone calling around.