Vogt P18AL TUBE-ICE, Service Manual

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P18AL Service Manual
MAINTENANCE
3/6/07
7-5
Other Maintenance Operations
Cutter Gear Reducer.
The oil level of the gear reducer should be checked monthly or when there
is any evidence of leakage. The correct level is indicated by the pipe plug in the side of the gear
housing. The oil should run out of the hole when the plug is taken out. If low, add oil through one
of the top plugged holes. A high grade lubricant such as Mobil 600W or SAE 140 gear oil should be
used. The oil should be changed annually. Drain the oil and flush the gear case with mineral spirits.
Drain the mineral spirits completely and refill with the proper oil.
Note: If a USDA high food grade lubricant is desired, use Chevron FM Lubricating Oil 460X.
! CAUTION !
Follow all lock-out and tag-out procedures before servicing any electrical equipment.
! CAUTION !
Oil Trap.
Although the compressor is equipped with an oil separator, which has an automatic
return, some oil will pass through the separator and eventually settle in the oil trap (22), which is
offset from the base of the freezer. This oil trap will have evidence of frost on its surface during the
freeze cycle and may be more pronounced at the end of a normal freeze cycle just before the harvest.
Where there is oil in the trap, there will not be frost. Where there is frost, there will not be oil.
When the trap is 1/2 to 3/4 full of oil, it should be drained.
The machine should be shutdown for at least 12 hours before attempting to drain oil from the trap.
Follow the procedure outlined in the service section, “Draining Oil Trap”.
! CAUTION !
Only qualified refrigeration service personnel familiar and
experienced in the handling and use of anhydrous ammonia (R717) should be
authorized to perform the “Draining Oil Trap” procedure.
! CAUTION !
Optional Maintenance Operations
The following sections outline some general guidelines for service of auxiliary equipment. Always
follow the instructions provided by equipment manufacturers when performing service operations or
scheduled maintenance.
Water Cooled Condenser Cleaning (optional). As water evaporates from a cooling tower, the
solid impurities remain and must be flushed from the system to prevent a scale build-up in the
condenser and cooling tower. This can be accomplished by a continuous bleed off valve located in
the pump discharge line. The valve should be adjusted to bleed off an equal amount of water that is
evaporated. If water hardness is very high, a higher bleed off rate or chemical treatment may be
required. Consult you local water treatment company for recommendations.
If after a period of time, scale has formed inside the tubes, mechanical cleaning may be necessary.
See “Servicing Section--Condenser”.
Cooling Tower/Evaporative Condenser (optional).