Stoelting U421 series Operator's Manual page 14

Section 2: Operation
E.9
Assemble the air bleed valve o-ring onto the air bleed
valve. Position the o-ring into the groove. Apply a thin
fi lm of Total Blend lubricant to the o-ring.
E.10
Insert the air bleed valve into
the back of the front door.
Install the compression
spring onto the air bleed
valve then screw the knob
on fi nger tight.
14 U421-I2A & U431-I2A OPERATOR'S MANUAL
E.11
Install the o-rings onto the spigot bodies and apply a
thin layer of Total Blend lubricant to the o-rings . Install
the spigot bodies through the bottom of the front door.
E.12
Fit the front door
o-rings into the groove
on the rear of the front
door.
513713 REV.0