Stoelting F431 Service Manual page 32

CAUTION
System Under Pressure
Never disconnect hoses from machine or pump without
fi rst opening spigot to relieve pressure.
A. Loosen clamp and remove air hose from pump
compressor.
B. 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.
C. Completely disassemble both hose assemblies
and check valve. Place hoses, tee, check valve
assembly, 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 fi ttings. Rinse all parts in clean 90° to
110°F (32°C to 43°C) water (see Figure 3-16 and
3-17).
Figure 3-16 Removable Parts
Figure 3-17 Removable Parts for optional BCS
D. Carefully inspect each part for wear or damage.
Replace worn or damaged parts.
E. Wash feed tube and air tube with 90° to 110°F
detergent water and brushes provided. Rinse with
clean, 90° to 110°F water (See Figure 3-18 and
3-19).
Figure 3-18 Cleaning Air Tube
Figure 3-19 Cleaning Feed Tube
F. Prepare two gallons (7.5 liters) of sanitizing
solution using a USDA certifi ed grade sanitizing
solution. Sanitize all removed parts, then air dry.
G. Check Hose Service Record decal to determine
if hose reposition or replacement is required at
this time.
H. 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. (Refer to Section 2.5 Mix
Pump).
I. Sanitize assembled machine as per instructions
outlined in Section 3.9.
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