Stoelting U421 series Operator's Manual page 27

B.20
Connect the tan hose to the bottom of the check
valve block. The bottom of the block has the smaller
hose connector.
B.21
Install the o-rings onto the base of the check valve
block. Apply a thin layer of sanitary lubricant to the
o-rings.
513713 REV.0 U421-I2A & U431-I2A OPERATOR'S MANUAL
Section 3: Maintenance
B.22
Connect the clear hose to the top of the check valve
block and tighten the clamp.
Insert the other end of the clear hose onto the mix
tube at the top of the cabinet. Do not tighten the clamp
until the check valve block is installed.
B.23
Install the check valve into the
block and secure the block with
the wire clamp. Make sure the
rubber check valve is installed in
the bottom seat of the assembly.
B.24
Adjust the clear hose so that it is not kinked and tighten
the clamp holding the hose to the mix tube.
B.25
Connect the low mix sensor wires
to the sensor
B.26
Sanitize assembled machine as per instructions
outlined in Section 2 F.
27