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28
III. MAINTENANCE – EVERY 3 MONTHS
A. Check that the oven is cool and the power is disconnected,
as described in the warning at the beginning of this Section.
B. Vacuum both of the blower mounts, and their surrounding
compartments, using a shop vacuum.
C. Tighten all electrical terminal screws.
D. 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 4-4.
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.
Figure 4-4. 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
4-4.
9. Replace the conveyor adjustment screws as
shown in Figure 4-4. 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 4-5. 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.
12. Standard conveyors are equipped with bronze
bushings mounted on spacers at both ends of the
shaft, as shown in Figure 4-5. For these convey-
ors, 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.
13. Disassemble and lubricate the two sections of the
drive shaft as described for the idler shaft, above.
14. Before reassembling the shafts into the conveyor
frame, check that they are oriented properly.
15. Reassemble the drive shaft into the conveyor.
Make sure that the bronze washer is in place
between the two sections of the shaft. See Figure
4-4.
16. Replace the drive sprockets. Reassemble the
belts and master links onto the conveyor.
17. Reinstall the end plugs and conveyor onto the
oven. Reattach the drive chains. Replace the
chain cover.
18. Check the tension of the conveyor belt as shown
in Figure 2-14 (in Section 2, Installation). The belt
should lift about 1(25mm). If necessary, adjust
the belt tension by turning the conveyor
adjustment screws.
19.
Replace all components onto the oven.
Figure 4-5. Drive shaft configurations