Remove the rust and corrosion within the water
compartment, as necessary, with solvent, and
paint the bare spots with heat-resistant
Check the thermostat with a mercury
thermometer. The thermostat must be accurate
to within either plus or minus 5°F.
Use table P of appendix II to check other
items that apply to this equipment.
From time to time, you may be called upon to
adjust dishwashing machines that have become
defective (figs. 5-4 and 5-5). Some of the most
common difficulties, the usual reasons for their
occurrence, and possible remedies for them are listed
in table Q of appendix II.
Now and then, descaling deposits from within the
machine, the piping, and the pumps will be required.
You can fill the tank halfway with hot water, add an
approved cleaning solution, fill the tanks to
overflowing, and then operate the machine for 30
minutes at high temperature with trays, spray arms,
and curtains in place. Next, drain the tanks and fill
them with hot water and run the machine for 5 minutes.
This rinsing action should be repeated several times to
make sure all of the cleaning solution is removed from
Dishwashing machines and accessories should be
lubricated according to the manufacturers
instructions. This is especially true in the selection of
Figure 5-4.A semiautomatic single-tank dishwasher.