Middleby Marshall 60254 Manual Do Utilizador

P/N 60254 September 28, 2012

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 Installa-

tion 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, lubri-

cate 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.

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.

 

Standard conveyors are equipped with bronze bush-

ings 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 as-

sembly free of the conveyor frame. The brackets will 

be removed along with the drive shaft assembly.

12.  Disassemble  and  lubricate  the  two  sections  of  the 

drive shaft as described for the idler shaft, above.

13.  Before  reassembling  the  shafts  into  the  conveyor 

frame, check that they are oriented properly.

14.  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.

15.  Replace the drive sprockets. Reassemble the belts 

and master links onto the conveyor.

16.  Reinstall the end plugs and conveyor onto the oven.
17.  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 ten-

sion by turning the conveyor adjustment screws.

19.  Replace all components onto the oven.