Frymaster 47 Series Service & Parts Manual page 33

1.9.5 Filtration Problems (cont.)
• Shortening was solidified in the pan or filter lines.
• The operator attempted to filter oil or shortening that was not heated. Cold oil and shortening are
thicker and cause the pump motor to work harder and overheat.
If the motor runs but the pump does not, there is a blockage in the pump. Incorrectly sized or
installed paper will allow food particles and sediment to pass through the filter pan and into the
pump. When sediment enters the pump, the gears can bind up causing the motor to overload, again
tripping the thermal overload. Solidified shortening in the pump will also cause it to seize, with the
same result.
A pump seized by debris or hard shortening can usually be freed by manually moving the gears with
a screwdriver or other instrument.
1. Disconnect power to the filter system.
2. Remove the input plumbing from the pump.
3. Use a screwdriver to manually turn the gears
•
Turning the pump gears backwards will
release a hard particle and allow its
removal.
•
Turning the pump gears forward will
push softer objects and solid shortening
through the pump and allow free
movement of the gears.
Incorrectly sized or installed paper will also allow food particles and sediment to pass through and
clog the suction tube on the bottom of the filter carriage. Particles large enough to block the suction
tube may indicate that the crumb tray is not being used.
Pan blockage can also occur if shortening is left in the pan and allowed to solidify. The heater strip
on the suction tube is designed to prevent solidification of residual shortening left in the tube. It will
not melt or prevent solidification of shortening in the pan.
47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-28
Sediment Particle
Unclogging a filter pump.
Sediment Particle
Oil Flow
Up for reverse
Down for forward