Frymaster BIH52 User Manual
Page 43
3-26
Whenever the complaint is “the pump is running, but no oil is being filtered,” check the installation
of the filter paper, including that the correct size is being used. While you are checking the filter pa-
per, verify that the O-ring on the bottom of the filter pan is present and in good condition. A missing
or worn O-ring will allow the pump to suck air and decrease its efficiency.
If the pump motor overheats, its thermal overload will trip and the motor will not start until it is re-
set. If the pump motor does not start, press the red reset switch located on the rear of the motor. If
the pump then starts, something caused the motor to overheat. It may just be that several frypots
were being filtered one after the other and the pump got hot. Letting the pump cool down for at least
a half-hour is all that is required in this case. More often, the pump overheated for one of the fol-
lowing reasons:
• 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 hums but the pump does not rotate, 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 as illustrated below. Make sure power to the pump motor is off
before trying this.
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.
Sediment Particle
Oil Flow
Up for reverse
Down for forward
Sediment Particle