Hoshizaki F-450MAH - Manual (Page 41)

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11) Remove the bulb of the expansion valve.
12) Disconnect the brazing-connections of the expansion valve and the copper tube-
low side from the evaporator, using brazing equipment.
13) Remove the two truss head machine screws and the bracket securing the
evaporator.
14) Disconnect the three hoses from the evaporator.
15) Remove the four socket head cap screws securing the evaporator with the
bearing-lower.
16) Lift off the evaporator.
Bearing-Lower and Mechanical Seal
17) The mechanical seal consists of two parts. One moves along with the auger, and the
other is fixed on the bearing-lower. If the contact surfaces of these two parts are worn
or scratched, the mechanical seal may cause water leaks and should be
replaced.
18) Remove the O-ring on the bearing-lower.
19) Remove the four bolts and the bearing-lower from the gear motor. Replace the
bearing inside the bearing-lower, if it exceeds the wear tolerance of 0.02" or is
scratched.
Note: Replacing the bearing requires a bearing press adaptor. If it is not available,
replace the whole bearing-lower.
Gear Motor
20) Remove the coupling-spline on the gear motor shaft.
21) Remove the three bolts securing the gear motor.
22) Assemble the removed parts in the reverse order of the above procedure.
WARNING
Be careful not to scratch the surface of the O-ring, or it may cause water
leaks. Handle the mechanical seal with care not to scratch nor to
contaminate its contact surface.