5 Maintenance
5.2
Cleaning Procedure
Cleaning
Cleaning
Cleaning procedure
procedure
procedure for
for
for soiled
soiled
soiled impeller
impeller
impeller screw
screw
screw tapped
tapped
tapped hole:
hole:
hole:
Warning:
Warning:
Warning: Always follow the instructions in the safety data sheet for the cleaning agent.
1. Remove stub shaft (7) as per section 4 of the Service manual.
2. Submerge and soak the stub shaft for 5 minutes in COP tank with 2% caustic wash
3. Scrub the blind tapped impeller screw hole vigorously by plunging a clean 1/2” diameter sanitary bristle pipe brush in
and out of the hole for two minutes while submerged.
4. Soak stub shaft (7) in acid sanitiser for 5 minutes, then scrub blind tapped hole as described in step 3 above.
5. Rinse well with clean water and blow-dry blind tapped hole with clean air.
6. Swab test the inside of the tapped hole to determine cleanliness.
7. Should the swab test fail, repeat steps 2 to 6 above until the swab test is passed.
Should swab testing continue to fail, or time is of the essence, install a new (spare) stub shaft (7).
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