Leakage - Frymaster FilterQuick FQG80T Service Manual

air and decrease its efficiency. Also check the pre-filter. A plugged pre-filter (see Figure 34) can slow the flow of oil. Use the
attached wrench to open (see Figure 35) and clean the pre-filter (see Figure 36). Ensure the pre-filter is tight and the O-ring
is present to prevent air from entering the line and causing slow oil return.
If the pump motor overheats, its thermal overload will trip, and the motor will not start until it is reset. If the pump motor
does not start, press the reset switch located on the front of the motor. If the pump starts, something caused the motor to
overheat. It may be attributed to several frypots in a large battery of fryers being filtered one after the other and the pump
overheated. 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 following reasons:
Shortening that remained in the pan after previous filtering solidified in the suction tube recess in the bottom of
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the pan or the suction tube, itself. Adding hot oil to the pan and waiting a few minutes will usually correct this
problem. A flexible wire can be used to clean out the suction tube and the recess in the bottom of the pan. NEVER
use compressed air to blow solidified shortening out of the suction tube.
The operator attempted to filter oil that was not heated. Cold oil is thicker and causes 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 envelope
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 and cause the motor to overload, tripping the thermal
overload. Solidified shortening in the pump will also cause it to
seize, with similar results.
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 on the following page. Ensure 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 (see Figure
37).
Turning the pump gears backwards will release a hard
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particle and allow its removal.
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Turning the pump gears forward will push softer objects and solid
shortening through the pump and allow free movement of the
.
gears
4. Prior to reassembly, the inside housing must be clean and free of any sediment or debris. If not, the gears will
bind again after reassembly.
Incorrectly sized or incorrectly installed filter leaf envelope will allow food particles and sediment to pass through and clog
the suction tube recess on the bottom of the filter pan or the suction tube, itself. Particles large enough to block the
suction tube recess or the suction tube may indicate that the crumb tray is not being used.
Heater strips (if equipped) on the oil return plumbing are designed to prevent solidification of shortening left in the
plumbing. Heater strips will not melt or prevent solidification of shortening in the filter pan.
Filter systems equipped with oil-return heater tape are wired into the 120 VAC source and remain energized as long as the
unit is plugged in and power remains constant. Heater tape should receive constant power all day and all night; it should
not be connected to a power supply that is turned off at night.
1.16.6

Leakage

Leakage of the frypot will usually be due to improperly sealed high-limit thermostats, RTD's, temperature probes, other
sensors and drain fittings. When installed or replaced, each of these components must be sealed with Loctite
sealant or equivalent to prevent leakage. In very rare cases, a leak may develop along one of the welded edges of the
frypot. When this occurs, the frypot must be replaced.
If the sides or ends of the frypot are coated with oil, the most likely cause is spillage over the top of the frypot rather than
leakage.
FLOW
Figure 37
Internal Oil Flow is illustrated by
large arrows.
1-25
Sediment Particle
Up for reverse
Down for forward
® PST56765