Removal And Replacement Of Mechanical Seal And Lower Housing - Hoshizaki C-80BAJ Service Manual

21) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the system (if using an electronic leak detector), and then raise
the pressure using nitrogen gas (140 PSIG). Do not use R-134a as a mixture with
pressurized air for leak testing.
22) Evacuate the system, then charge it with refrigerant. See the nameplate for the required
refrigerant charge.
23) Reattach and secure the reservoir outlet hose. Replace the evaporator condensate
drain pan and all hoses in their correct positions.
24) Install the auger assembly with the upper part of the mechanical seal attached. Replace
the cutter, extruding head, and evaporator flange in their correct positions and align the
extruding head and evaporator flange holes. See Fig. 7.
25) If new seal bolts do not have preapplied threadlocker, apply Loctite 243 or equivalent
threadlocker to seal bolts. Tighten seal bolts to a torque of 11.1 ft-lb/15 N·m.
26) Replace the packing and spout in their correct positions.
27) Open the water supply line shut-off valve.
28) Plug the appliance into the electrical outlet, then move the control switch to the "ICE"
position to start the automatic icemaking process.
29) Once the appliance starts to produce ice, allow it to run for another 30 minutes. Check
for water leaks.
30) After 30 minutes, move the control switch to the "OFF" position. Unplug the appliance
from the electrical outlet.
31) Pour warm water into the storage bin and melt the ice. Clean the storage bin liner using
a neutral cleaner. Rinse thoroughly after cleaning.
32) Replace the rear panels and top panel in their correct positions.
33) Plug the appliance into the electrical outlet, then move the control switch to the "ICE"
position to start the automatic icemaking process.

5. Removal and Replacement of Mechanical Seal and Lower Housing

5a. Mechanical Seal
1) Close the water supply line shut-off valve.
2) Move the control switch to the "DRAIN" position.
3) Allow the water system to drain for 1 minute.
4) After all of the water has drained, move the control switch to the "OFF" position.
Unplug the appliance from the electrical outlet.
5) Remove all ice from the storage bin.
6) Remove the top panel and upper rear panel. See Fig. 4.
7) Remove the spout and packing.
8) Remove the seal bolts securing the extruding head and evaporator flange.
NOTICE! Discard existing seal bolts after removal. Seal bolts must be replaced
once removed because seal material is one-time use only.
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