Routine Maintenance - H.C Duke & Son 959R Operator’s Manual With Illustrated Parts List

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11 Routine Maintenance

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H. C. Duke & Son, Inc. recommends the following schedule to help maintain your freezer in like-new
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operating condition, as well as help protect your investment. Take the time to learn and perform these
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routine procedures and receive in return many years of valuable service from your freezer
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investment!
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 1. Disassemble, wash, rinse, sanitize,
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and air-dry, reassemble and sanitize all
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parts that come into contact with mix or
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product.
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To prevent bacteria growth,
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remove all O-rings when
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 cleaning. Failure to do so could
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 create a health hazard.
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2. Clean the cylinder , cylinder inlet tubes,
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and drain tubes with the appropriate
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brushes.
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3. When cleaning, inspect all o-rings,
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seals and hoses. Replace any o-ring,
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seal or hose that is worn, torn, or loose-
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fitting.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 4. Wipe all exterior surfaces of the freezer ,
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removing any splattered mix.
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5. Check overrun and temperature of the
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product.
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DAILY
CAUTION
DUKE Model 959R Soft Serve Freezer
WEEKLY
1. Carefully inspect all p arts for wear ,
including, seals, O-rings, mix tubes, and
blades. Replace as required.
Replace blades if worn 3/32" or more.
2. Check the beater shank for wear .
A worn shank will have a nonparallel shape
on the drive opening.
. Protect your
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