Backhoe 555D leaking coolant

[GWCON]

I have a 555D that is leaking a lot of coolant once the engine gets hot at the bottom of the motor where the front of the fuel tank is. Is this a seal that has failed or am I missing something? Thanks.

 

[RickB]

Head gasket or frost plug. Can't see that well from here.

 

[GWCON]

Thanks for your response. Seems you can see better from there than you thought. Turns out its the frost plug. Having the engine pulled next week. Going to replace the front, rear and head seals while its out.