Extruding Head (Upper Bearing), Housing (Lower Bearing); Mechanical Seal - Hoshizaki FM-600ALKE-CO2-SB Service Manual

After replacing the extruding head and mechanical seal:
1) Reset the compressor operating hours in accordance with "III. 5. [f] RESETTING
COMPRESSOR OPERATING HOURS". The "PC" indication on the display goes off.
2) Record the date of replacement on the label attached to the front panel.
Operating Hours
0 to 20,000 hours
20,000 to 20,500 hours
20,500 to 21,000 hours

2. EXTRUDING HEAD (UPPER BEARING), HOUSING (LOWER BEARING)

These parts should be replaced if a diametrical
gap of more than 0.5 mm is found when at
least three spots are checked by changing the
direction of the auger on each bearing.
It depends on the water quality and conditions,
but normally the bearings should be checked
for wear after a total of 8,000 - 10,000 hour
operation from installation date.
Note: The clearance between the auger blades
and the evaporator interior is 0.4 - 0.5 mm.
If the bearings and rotating parts are
worn out to create a larger clearance,
the evaporator interior may be damaged.
(The diameters differ by 0.8 - 1.0 mm.)
If the auger surfaces against which the bearings contact are no longer smooth or
show any burrs or abrasions during the above inspection, replace the auger. The
sealing bolt must be tightened equally to torque of 784N·cm±10%.

3. MECHANICAL SEAL

The mechanical seal prevents water leaks from between the auger and the housing
bearing and gradually wears out to reduce its watertightness. Check the amount of water
leakage from the drain pipe located at the side of the gear case to determine the necessity
of replacement.
Total operation time
3,000 hours
10,000 hours
Attach the mechanical seal with its floating sheet facing the housing. After replacement,
there should be no water leakage from the mating surface.
"PC" Indication
None
"PC" > "ICE" > "PC" > "ICE" > "PC" > "ICE" > "PC" > ......
* Flashes every second.
"PC" > "PC" > "ICE" > "PC" > "PC" > "ICE" > "PC" > ......
* Flashes every second.
Replace the parts as soon as possible.
Water leakage
0.1 mL/h
0.5 mL/h
12
0.5 mm Round Stock
or Pin Gauge
For reference only
(May differ from actual design)
Auger
Extruding
Head