How to disassemble the 2 15 heater box of Sany excavator?

1 Drain the old antifreeze. 2 Remove the cab instrument assembly and control panel, etc. 3 Remove the fixing screws of the instrument panel. 4 Unplug the heater hose connector and hose. 5 Remove the fixing bolts of the heater water tank. 6 Replace the heater tank with a new one. 7 reassemble according to the principle of first disassembling and then assembling, then disassembling and then assembling new clothes. 8 Add antifreeze. 9 check the completion audit.