Low Pressure Heating
Be careful when removing the refractory box assembly.
Using a pry bar or a length of 2 X 4 inch lumber will help to
prevent crushed fingers or hands when the last machine
screw is removed.
Remove the four machine screws (21) and internal tooth lock
Machine screws (21)
washers (22) from the bottom side of the low pressure heating boiler (20).
Internal tooth lock
Remove twelve hexagon plain nuts (23), internal tooth lock washers (22)
Hexagon plain nuts (23)
and machine screws (21) from both sides of
Support the refractory box and
Refractory lining (25)
remove four hexagon plain
Refractory castable mix (26)
nuts (23), internal tooth lock
washers (22), and machine
screws (21 ) from the top side of
boiler (20). Remove refractory
box assembly (24), refractory
lining (25) and refractory
castable mix (26), as a unit.