M5700 a/c problems

[tractor mech]

I own a M5700, cab, 4x4,LA1002 loader the problem I have here in florida is a/c is not cooling as good as I would like. I keep the radiator and condenser blown out, have cleaned a/c filter and removed roof and blew out evap. a/c works good in morning when cool but as day heats up it doesent cool as good. Have checked freon also, sight glass is clear do not remember what pressure readings were. I think the system is to small for the cab,would a bigger condenser help or a electric fan on condenser. Thanks

[eserv]

M5700 ac is marginal in hot humid climates like Florida. (they are barely good enough here in Alberta!) Make sure you are in recirc position for best performance.

[Service Dept Vic]

Push a can of Red Tek into that system!

[tractor mech]

Thanks,but what is red tek, is it used with 134a? Do I need to remove some of the 134a before installing it or remove it all and charge it with red tek?

[eserv]

Vic is right, Red-Tek or dura-cool will smarten it right up!
You will need to completely replace the r134a that is in there now.
Good luck buying it in the US though! Dupont has the refrigerant market completely sewed up down there.
Ed