Stoelting U421 series Operator's Manual page 25

B.4
Disconnect the wires from the
low mix sensor.
B.5
Turn the pump on and pull down
on the pickup end of the tan
hose until a few inches of tubing
is visible. The pickup end is on
the left side.
Then turn the pump off .
Loosen the clamp on the tan hose
and disconnect the hose at the
low mix sensor.
B.6
Turn the mix pump on and pull the tan house out of
the black cover clamp then turn the mix pump off .
B.7
Unfasten the wire clamp on the
check valve block by swinging
the clamp to the right. Remove
the check valve.
513713 REV.0
2. Inspect and Cleaning
U421-I2A & U431-I2A OPERATOR'S MANUAL
Section 3: Maintenance
B.8
Loosen the clamp on the mix tube at the top of the
cab and remove the hose from the tube.
B.9
Remove the two o-rings from the
base of the check valve block.
B.10
Remove the hose assemblies from the cab.
Loosen all clamps and disconnect all hoses including
the following:
• Bag adapters
• Mix collection manifold
• Low mix sensor
• Check valve block
B.11
Inspect all the parts for wear and replace as necessary.
B.12
Thoroughly clean the parts with 90° to 110°F detergent
water and brushes provided. Rinse with clean, 90° to
110°F water.
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