2012 volvo d13 overheating

Greetings all.
Been owner operator for 4 years now with 2012 volvo d13 engine . Last month my truck started overheating every 30 min buzzer sounds and guages pass over 210f after slowing my speed from 65mph to 30mph for less than a minute temps gose down to 170f-190f depand on weather and load . Stoping and checking water level after every overheat is low

Things i did at mechanic
1 brake air compressor blown replaced with new from volvo dealer.
2 water pump replaced from dealer
3 thermostat replaced from dealer
4 fan and sensor with new belts new from dealer
5 brake air compressor cooler with filters new from dealer.

Still over heats and still blowing brake air compressor for 3 times in two weeks.


Thanks for you time .please help I'm lossing tons f money

 

thanks for reply sir

yes its as soon as I stop the truck I see bubbles in reservoir
No I didn't check truck currently at mechanic with furth brake air compressor to be replaced as he insisted