Howe Rapid Freeze, Руководство по обслуживанию

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15 Service & Adjustment
59
REPLACEMENT OF MAIN BEARINGS 2000-6000 lb MODELS
1) Remove motor and speed reducer by taking out the 4 - 3/8" cap screws, from the top aluminum
casting.
2) Remove the lower half of the flexible coupling.
3) Remove rivets which retain the outer stainless steel jacket around the ice flaker. Push the
stainless jacket away from the body of the ice flaker.
4) Cut away at the upper 3 inches of insulation uncovering 4 - 3/8" cap screws which bolt the
upper aluminum casting to the evaporator.
5) Using a rubber mallet, gently tap the aluminum casting from below (upwards) to free it from
the evaporator. Adhesive is used to retain the rubber insulating ring in place.
6) Lift up on the aluminum casting and slide it off the shaft.
7) Loosen rubber squeegee mounting bolts and push squeegee away from the evaporator surface.
8) Lift the shaft assembly out of the evaporator. Be careful to avoid scratching evaporator
freezing surface with the ice blade.
9) Examine shaft journals for wear. If worn, repair or replace shaft.
10) Remove old oil seals in upper casting.
11) Drive out bearing in upper casting, using a drift pin or properly sized wood block. Note: To
avoid distortion of casting it should be supported near the bearing area and not on the outer edge.
12) Drive new bearing into position. Then press the new oil seals into position.
13) To remove the bottom bearing, first remove the bottom bearing cover, and the old bearing
plate.
14) Now follow the same steps as were done for the top bearing. (steps 10-12)
15) Install new bottom bearing plate, replace bottom bearing cover.
16) Insert the new or repaired shaft. Running clearance between shaft and new bearing must be
about .001". Shaft must rotate freely in bearing.
17) Re-position rubber insulating ring - use adhesive if possible. Re-install top casting. Make sure
that the evaporator lugs are properly seated against shoulders machined in casting. If steel spacers
are found between evaporator lugs, they should be re-used in the same position. These are required
to obtain proper alignment. Tighten the four mounting bolts evenly.
18) Shaft must rotate freely by hand. If shaft is tight, it indicates that the top casting is off center.
19) Install ice blade and adjust clearance to approximately .003" at closest point. Refer to blade
adjustment instructions.
20) Re-install bottom half of the flexible coupling.
21) Re-install speed reducer and motor.
22) Re-install stainless steel jacket.