Service Procedures; Evaporator Disassembly; Evaporator Reassembly; Gearmotor Replacement - Follett MCC400A Installation, Operation And Service Manual

Service procedures

Evaporator disassembly (Fig. 7)
1. Disconnect power to ice machine.
2. Shut off water to ice machine.
3. Drain evaporator and fl oat tank.
4. Disconnect plastic tubing from evaporator water inlet, drain pan stub,
compression nozzle tubing and reservoir overfl ow tubing from secured clip.
5. Disconnect ice transport tube from compression nozzle.
6. Remove nut and upper vee band coupling from top of evaporator.
7. Lift top bearing assembly straight up with a slight rotating motion and
remove.
8. Remove ice compression loop located at top of auger.
9. Lift auger straight up and out of evaporator.
10. Remove nut and lower vee band coupling from bottom of evaporator.
11. Lift evaporator to clear bottom bearing assembly.
12. Loosen hex head bolt in side of mounting base with 5/16 wrench and lift
lower bearing assembly.
13. Remove condensate shield.
14. Remove 4 Allen head machine screws holding mounting base to gearbox.
15. If replacing evaporator, remove compression nozzle from evaporator port.
Evaporator reassembly (Fig. 7)
1. Clean gearmotor boss, output shaft and shaft well.
2. Install drain pan and evaporator mounting base.
3. Fill gearmotor shaft well with food-grade grease (Fig. 8).
4. Install condensate shield and seat against gearmotor boss.
5. Install bearing O ring in groove in evaporator mounting base.
6. Lower bottom bearing assembly into evaporator mounting base.
7. While maintaining a slight downward pressure on bottom bearing
assembly, tighten hex head bolt with a 5/16 wrench.
8. Position evaporator over lower bearing assembly and align grooves with
pins in bearing assembly.
9. Install vee band clamp and nut to 8.05 mm/kg (70 in/lb).
10. Place auger in center of evaporator and rotate to mate with drive pin.
11. Install ice compression loop, orienting loop.
12. Install upper bearing and seal assembly, rotating bearing to slip pin into
auger slot.
13. Install upper vee band clamp and nut to 8.05 mm/kg (70 in/lb).
14. If evaporator was replaced, reinstall compression nozzle on new.
Gearmotor replacement (Fig. 8)
1. Disassemble evaporator as described above.
2. Disconnect the wire connectors.
3. Remove 4 screws holding gearmotor mounting plate to base of ice
machine and lift gearbox and motor clear of ice machine (Fig. 8.1).
4. Remove machine screws holding mounting plate to motor (Fig. 8.2).
5. Install new motor in reverse order.
31
Fig. 7
Fig. 8
1
2
Apply
grease
here