Removal And Replacement Of Mechanical Seal And Lower Housing - Hoshizaki C-100BAF-AD Service Manual

5. Removal and Replacement of Mechanical Seal and Lower Housing

5a. Mechanical Seal
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper rear panel. See Fig. 9.
8) Remove the clamp securing the drain plug, then lower the drain hose into a container.
Remove the drain plug to drain the water from the reservoir and evaporator assembly.
9) After all of the water has drained, replace the drain hose, drain plug, and drain clamp in
their original positions.
10) Remove the packing.
11) Remove the allen head cap screws securing the extruding head and evaporator flange.
Remove the evaporator flange, then grasp the cutter and carefully lift out the cutter and
extruding head. Grasp the top of the auger and carefully lift out the auger. When pulling
out the auger, the upper part of the mechanical seal should come out with it.
12) Remove the allen head cap screws securing the evaporator to the lower housing.
13) Raise the evaporator up to access the lower housing.
14) The mechanical seal consists of two parts. One moves along with the auger, and the
other is fixed on the lower housing. If the contact surfaces of these two parts are worn,
cracked or scratched, the mechanical seal may cause water leaks and should be
replaced.
15) Remove the mechanical seal from the housing. If only replacing the mechanical seal,
proceed to step 18.
To help prevent water leaks, be careful not to damage the surfaces of the
O-ring or mechanical seal.
5b. Lower Housing
16) Remove the O-ring and the bolts securing the lower housing to the gear motor and
remove the housing from the gear motor. If inspection of the upper bearing inside the
extruding head (see "V.C.1. Upper Bearing Wear Check") indicates that it is out of
tolerance, replace both it and the bearing inside the lower housing.
Note: Replacing the bearing requires a bearing press adaptor. If one is not available,
replace the entire extruding head and housing.
17) Mount the lower housing onto the gear motor, then install the O-ring onto the lower
housing.
CAUTION
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