English – Middleby Marshall Model PS536 User Manual

Page 30

ENGLISH

1. Type 1 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. Loosen (DO NOT REMOVE) the set screw on the outer drive

sprocket. Then, slide the drive sprocket off the end of the

drive shaft. See Figure 4-6.

d. Loosen (DO NOT REMOVE) the set screws on all four steel

spacers (2 per shaft), AND on all twelve conveyor belt

sprockets (6 per shaft).

e. Gently work the shaft sections out of the conveyor frame,

removing the conveyor belt sprockets as necessary. See

Figures 4-6 and 4-7.

Slide the two sections of each shaft apart.

g. Clean all of the shaft components thoroughly using a rag.

Then, lubricate each solid inner shaft, AND the interiors of

each 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.

h. Slide the hollow shaft sections over the solid inner shafts.

Check that the hollow section that has a drive sprocket

attached is placed at the end of the the drive shaft.

Slide the reassembled shafts into the conveyor frame. As

the shafts are replaced, slide the steel spacers and con-

veyor belt sprockets onto the shafts. Refer to Figures 4-6

and 4-7.

After the shafts are properly aligned, position the steel

spacers against the ends of the bushings on the conveyor

frame. Tighten the set screws on the spacers to hold them

in place. Leave the conveyor belt sprockets loose at this

time.

k. Replace the outer drive sprocket. Tighten its set screw to

hold it in place.

Refer to Part C, Conveyor Installation, in the Installation

section of this Manual to replace the conveyor belt. As you

replace the belt, position the conveyor belt sprockets.

m. After the belt is in place and the sprockets are correctly

positioned, tighten the set screws to hold the sprockets in

place.

n. Reinstall the end plugs and conveyor onto the oven.
o. Reattach the drive chains. Replace the chain cover.
p. Check the tension of the conveyor belt as shown in Figure

2-11 (in Section 2, Installation). The belt should lift between

25-50mm. If necessary, adjust the belt tension using the

procedure in Part C (Conveyor Installation) in the Installa-

tion section of this Manual.

q. Replace the crumb trays and exit tray onto the oven. Then,

skip ahead to Part E, "Blower Belt."

Figure 4-7 - Disassembling the idler shaft

1. Remove outer

drive sprocket

Figure 4-6 - Disassembling the drive shaft

2. Loosen set

screws on belt

sprockets and

spacers (8)

3. Slide shafts out

of frame

Bushing

4. Disassemble,

clean, and

lubricate shafts

Smooth

sprocket (2)

Sprockets

w/teeth (4)

Spacer (2)

1. Loosen set

screws on belt

sprockets and

spacers (8)

2. Slide shafts out

of frame

Bushing

3. Disassemble,

clean, and

lubricate shafts

Smooth

sprockets (6)

Spacer (2)

SECTION 4 - MAINTENANCE