Figure 23 Removable Parts; Figure 24 Cleaning Air Tube; Figure 25 Cleaning Feed Tube; Figure 26 Mix Pump Tube Routing - Stoelting U421/U444 Owner's Manual

If the mix lines or air line is difficult to remove, soften
with a rag soaked in hot water. Hose connections
may be sprayed with Haynes Sanitary Lubricant for
ease of removal. Do not loosen or remove the mix
pump cover wingnuts. Maintain the mix pump hose
in its operational condition.
1. Loosen clamp and remove air hose from pump
compressor.
2. Loosen clamp and disconnect mix pump hose.
Remove the pickup hose, mix check valve and pickup
hose adapter (and bag adapter if applicable) as an
assembly from mix container.
3. Completely disassemble both hose assemblies and
check valve. Place hoses, tee, check valve assem-
bly, and pickup hose adapter in 90° to 110°F (32°C to
43°C), mild detergent water and wash thoroughly. Use
soft bristle brushes to clean inside of fittings. Rinse
all parts in clean 90° to 110°F (32°C to 43°C) water
(see Figure 23).
4. Carefully inspect each part for wear or damage.
Replace worn or damaged parts.
5. Wash feed tube and air tube with 90° to 110°F deter-
gent water and brushes provided. Rinse with clean,
90° to 110°F water (See Figure 24 and 25).
6. Prepare two gallons (7.5 liters) of sanitizing solution
using a USDA certified grade sanitizing solution.
Sanitize all removed parts, then air dry.
7. Check Hose Service Record decal to determine if
hose reposition or replacement is required at this
time.
8. Reassemble both hose assemblies per the diagram
located on the inside of the cab door. Reconnect
assemblies to the pump and discharge hose, using
the clamps. (See Figure 26 or refer to Section 2.5
Mix Pump).
Figure 23. Removable Parts
NOTE
9. Sanitize assembled freezer as per instructions
outlined in Section 3.9).
Figure 24. Cleaning Air Tube
Figure 25. Cleaning Feed Tube
Pump
Compressor
Figure 26. Mix Pump Tube Routing
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