Zetor 7341 Cooling

[mattaccount1]

HI, im having a cooling problem with my 7341 it a 1998 mod with air condish. I carnt keep it cool. new core, flush system still no good replaced fan with electric fi flow might of made it worse.. I put a new thermostat in it then took it out still no good i have herd of zetor cooling kits for this but im not shure whats in them.. im told this is a common falt with this model with air condish how can i fix the cooling prob without removing the A/C any further help appreciated thanks