Page 12 Model 3311
Preventative Maintenance Procedure (Every 6 to 12 Months)
A preventative maintenance visit should be performed every 6 to 12 months depending on the usage and environ-
ment where the unit is placed. (Ex. seasonal machines - once before season, year round machines - twice per year).
The following procedures should be performed during a preventative maintenance visit. This does not take the place
of daily care and cleaning procedures as described by local health codes and the manual. PM kit #W0890157 con-
tains the standard replacement parts needed for preventative maintenance including o-rings, standard seal kit stator
bearings and drive belt. Units with a coconut oil product seal should order all parts separately. Units with scraper
blade dasher will require the scraper blades be ordered separately.
• Verify ventilation is adequate (Air-cooled units: 6” minimum on both sides, open at top, and as far as possible from
dust sources; Water-cooled units: 0” on both sides, 3 - 6” at rear of unit and open at top).
• Verify adequate water flow and drain connections on water-cooled versions.
• Check product temperature and consistency for proper setting (refer to product manufacturer’s recommendation) -
adjust if necessary. Where equipped be sure to check the temperature in both the hopper and cylinder.
• Ensure product is being mixed properly and is within specification (check brix - most products should be around
13% - refer to product manufacturer’s recommendations for exact recommended brix).
• Check for any leaks.
• Empty product from the unit. Disassemble unit completely (as if for cleaning).
• Clean and sanitize all disassembled parts following the cleaning instructions in the manual.
• Clean and sanitize hopper, freezing cylinder and splash zones on the machine.
• Check condition of all panels and lids - replace if necessary.
• Check dasher scraper blades for wear if equipped - replace once per year minimum.
• Check dasher for signs of wear - replace if necessary. Verify alignment when replacing.
• Check valve body gasket for wear - replace once per year minimum.
• Check valve body knobs (used to hold valve body in place) - replace if necessary.
• Check condition of shaft seals and stator bearings - replace once per year minimum.
• Inspect drip cup at back end of freezing cylinder for signs of seal leakage.
• Replace o-rings on hopper float (where necessary), dispense valves and carb tubes (lubricate).
• Lubricate parts where appropriate (dispense valve o-rings, carb tube o-rings, rubber boot of stationary shaft seal).
• Re-assemble unit and sanitize hopper and freezing cylinder by running CLEAN cycle.
• Clean and sanitize spinner if equipped.
• Check operation of merchandiser and mode lights - replace light bulbs if necessary.
• Clean reusable filter if equipped. Check condition of filter and replace if necessary.
• Clean condenser.
• Inspect the drive shaft and motor shaft bearings for excessive wear (drive shaft hole rounding out) - replace if
necessary. Verify alignment when replacing.
• Check V-belt tension (should be 1/2” - 5/8”) and verify all set screws are tightened - adjust if out of range. Replace
belt once per year minimum.
• Verify compressor operation and freezer controller operation.
• Check electrical connections (outlet should be properly grounded with amperage capacity equal to or over the
amperage specified on the serial tag).
• Check fan operation (condenser fan) and clean fan blades if necessary.
• Review proper periodic care and cleaning instructions (disassembly, cleaning, sanitizing, lubrication, and
re-assembly) with store personnel. Train store personnel to follow proper procedures (stress importance of store
level maintenance ie. lubrication, filter cleaning, etc.).
• Make sure store personnel have appropriate supplies (lubricant, cleaning brushes and sanitizer) to care for
machine.
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