Middleby Marshall Model PS536 - Manual (Page 31)

31
ENGLISH
SECTION 4 - MAINTENANCE
1. Type 2 Conveyor Split Belt Cleaning
a. Refer to Part C, Conveyor Installation, in the Installation
section of this Manual. Then, remove the following compo-
nents from the oven:
•
Conveyor exit tray
• Crumb trays
• Chain cover
• End plugs
• Conveyor assembly
b. 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.
c. Remove the two conveyor adjustment screws from the idler
end of the conveyor frame, as shown in Figure 4-8.
d. Remove the idler shaft assembly from the conveyor.
e. Pull apart the two sections of the idler shaft.
f.
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.
g. Before reassembling the shafts into the conveyor frame,
check that they are oriented properly.
h. 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 4-10.
i. Replace the conveyor adjustment screws as shown in
Figure 4-8. To allow the conveyor belt to be reinstalled later,
do not tighten the screws at this time.
j. Loosen the set screw on both of the conveyor drive sprock-
ets. Then, remove the sprockets from the shaft.
k. Loosen the locking collar set screw, as shown in Figure 4-
9.
l. Push the drive shaft towards the drive sprocket, and lift it
free of the conveyor frame. Then, disassemble and lubri-
cate the two sections of the drive shaft as described for the
idler shaft, above.
m. Before reassembling the shafts into the conveyor frame,
check that they are oriented properly.
n. Reassemble the drive shaft into the conveyor. Check that
the nylon spacer is in place, as shown in Figure 4-10. Also,
check that the bronze washer is in place between the two
sections of the shaft.
o. Replace the drive sprockets. Reassemble the belts and
master links onto the conveyor.
p. Reinstall the end plugs and conveyor onto the oven.
q. Reattach the drive chains. Replace the chain cover.
r
Check the tension of the conveyor belt as shown in Figure
2-18 (in Section 2, Installation). The belt should lift about
25mm. If necessary, adjust the belt tension by turning the
conveyor adjustment screws.
s. Replace the crumb trays and exit tray onto the oven. Then,
skip ahead to Part E, "Blower Belt."
Figure 4-8 - Split Belt Idler Shaft
Figure 4-9 - Split Belt Drive Shaft
Figure 4-10 - Washer and Spacer
Conveyor
adjustment
screw
Locking collar
Bronze washer on
BOTH idler and
drive shafts
Nylon spacer
on drive shaft
ONLY