Grindmaster 3341A - Manual (Page 16)

Page 14 Crathco ® Remote Beverage Freezers
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
contains 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 mainte-
nance ie. lubrication, filter cleaning, etc.).
• Make sure store personnel have appropriate supplies (lubricant, cleaning brushes and sanitizer) to care for machine.