Stoelting U421 series Operator's Manual page 24

Section 3: Maintenance
B. Mix Pump Hose Cleaning
Any cleaning procedure must always be
followed by sanitizing before fi lling the
machine with mix.
The mix pump is approved for CIP (clean-in-place). It
is thoroughly cleaned when the cleaning solution is
pumped through the machine. To ensure CIP has been
properly performed, the pump should be completely
disassembled and cleaned every 7 days.
Hazardous Moving Parts Hazardous Moving Parts
Revolving pump head can grab, mangle, and cause
serious crushing injury. Make sure the display shows
the freezing cylinders and pump are off . If they are
not, press the On/Off button and Pump button to turn
them off .
System Under Pressure System Under Pressure
Never disconnect hoses from the machine or the pump
without fi rst opening the spigot to relieve pressure.
24
NOTE
WARNING
CAUTION
U421-I2A & U431-I2A OPERATOR'S MANUAL
1. Disassembly and Coiled Hose
Cleaning
B.1
Remove the three drawers from the cab. To remove a
drawer, pull it out. Tilt the drawer up to disengage the
front rollers. Pull it further out then up to disengage
the rear rollers.
B.2
Disconnect the bag adapters from
the coiled hoses.
Pull the coiled hoses so they are
straight. Then use detergent water
with the long brush to clean the hoses.
NOTE
Rotate the coiled hose as it is stretched to
help straighten it out.
B.3
Lift the collection manifold upwards
then tilt it back to detach it from the
bracket.
The manifold may need to be
rotated so the metal stem clears
the bracket.
513713 REV.0