Figure 5-5.A cutaway view of a double-tank automatic dishwasher.
grades and viscosities of the oil used, the levels at
which the oil is to be maintained, and the places to be
All damaged or missing lubrication fittings
should be replaced. The grease cups on the drive end,
connecting rod, and the rinse lever should be turned
once each quarter and be refilled when empty. Also,
the revolving wash arms and valve stems should have a
few drops of light oil applied to them about once each
Be sure to turn off the power before
lubricating the equipment.
Because of limited space, this chapter does not
attempt to provide all the necessary details concerning
the parts and accessories of dishwashing machines.
Study the manufacturers manual for the type and
make of machine concerned.
Some of the machine
parts and accessories of the dishwasher that should be
maintained and serviced regularly are as follows:
Repair or replace the torn or worn curtains.
Straighten the warped pans so they stay flat in
Replace the packing with new material of the
same type and size. Do not overpack the packing
gland because this condition causes binding of
Replace the broken or damaged thermometers.
Check the accuracy of the thermometer by
measuring the water temperature with a
high-grade thermometer and comparing results
with a thermostat setting. The thermostat should
be set for a wash water temperature between
138°F to 145°F and rinse water for a temperature
of 180°F or above.
Defective conveyors should be properly
adjusted or replaced. Check the nylon covering
of steel parts and replace the coverings when
they are worn or torn.
The inspection doors of wash and rinse
compartments should be kept tight at all times.
Straighten or replace bent or loose doors.
Check the chains and pulleys of counterbalanced
doors. Apply oil regularly to moving parts.
Check the dish racks for bent or warped surfaces
and replace broken parts.