Middleby Marshall PS360E Series, Owner'S Operating & Installation Manual

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SECTION 4
MAINTENANCE
41
8. Clean the air finger components and the interior of
the baking chamber using a vacuum cleaner and
a damp cloth. Refer to the boxed warnings at the
beginning of this section for cleaning precautions.
9. Reassemble the air fingers. Then, replace them in
the oven, using the “location guide” as a guide.
10. Replace the end plugs on the oven.
11. Reassemble the conveyor into the oven. If the
drive sprocket was removed when installing the
conveyor, replace it at this time.
12. Reattach the drive chain.
13. Check the tension of the conveyor belt as shown
in Figure 23 (in Section 2, Installation). The belt
should lift 1" (25mm). DO NOT OVERTIGHTEN
THE CONVEYOR BELT. If necessary, the belt
tension can be adjusted by turning the conveyor
adjustment screws, located at the idler (left) end of
the conveyor.
14. Replace the crumb trays.
III. MAINTENANCE - EVERY 3 MONTHS
1. Check that the oven is cool and the power is
disconnected, as described in the warning at the
beginning of this section.
2. Vacuum both of the blower mounts, and their
surrounding compartments, using a shop vacuum.
3. Tighten all electrical terminal screws.
Split Belt Disassembly and Cleaning
1. Refer to Part D, Conveyor Installation, in the
Installation section of this manual. Then, remove
the following components from the oven:
•
Conveyor end stop
•
Crumb trays
• Chain cover
• Drive chains
• End plugs
•
Conveyor assembly
2. Remove the master links from each conveyor belt.
Then, roll the belts up along the length of the
conveyor to remove them from the frame.
3. Remove the two conveyor adjustment screws
from the idler end of the conveyor frame, as shown
in Figure 33.
4. Remove the idler shaft assembly from the
conveyor.
5. Pull apart the two sections of the idler shaft.
6. Clean the shafts thoroughly using a rag. Then,
lubricate both the extended shaft and the interior
of the hollow shaft using a light food-grade
lubricant. DO NOT lubricate the shafts using
WD40 or a similar product. This can cause the
shafts to wear rapidly.
7. Before reassembling the shafts into the conveyor
frame, check that they are oriented properly.
Disassembling the Idler Shaft
8. Reassemble the idler shaft into the conveyor.
Make sure that the bronze washer is in place
between the two sections of the shaft. See Figure
33.
9. Replace the conveyor adjustment screws as
shown in Figure 33. To allow the conveyor belt to
be reinstalled later, do not tighten the screws at
this time.
10. Loosen the set screw on both of the conveyor
drive sprockets. Then, remove the sprockets from
the shaft.
11. Check the conveyor configuration as follows:
High-speed conveyors are equipped with large
flange bearings at both ends of the shaft, as
shown in Figure 34. For these conveyors, remove
the two screws that hold each bearing to the
conveyor frame. With the screws removed, lift the
end of the shaft at the front of the oven, and pull
the entire assembly free of the conveyor frame.
Standard conveyors are equipped with bronze
bushings mounted on spacers at both ends of the
shaft, as shown in Figure 34. For these conveyors,
remove the two screws that hold the bracket to the
conveyor frame. With the screws removed, lift the
end of the shaft at the front of the oven, and pull
the entire assembly free of the conveyor frame.
The brackets will be removed along with the drive
shaft assembly.