Middleby Marshall PS540G Section Maintenance, B. Electrical Terminals, C. Ventilation

SECTION 4

MAINTENANCE

B. Electrical Terminals

Open the control cabinet door by removing the three screws from the control cabinet door. Tighten all electrical control terminal screws including the electrical contactor terminal screws as shown in Figure 4-39.

CAUTION

Overtighteningthebeltwillcauseprematurebearing failure and possible vibration problems. A spare belt is located inside the control compartment on the rear wall.

3.When replacing the belt, loosen the tension adjustment bolts (Figure 4-42) on the motor mounting bracket. Next, pull back on the motor. Retighten adjustment bolts. Do not overtighten because the fan bearings may be damaged.

Figure 4-39.

C. Ventilation

Check that the air circulation throughout the oven is not blocked and is working properly.

D. Checking the Blower/Fan Belt

1.Check the main blower/fan belt for proper tension and wear. To gain access,loosen the six screws (Figure 4-40) of the rear shroud and lift shroud cover up and off.

2.The fan belt should deflect no less than 1″ (25mm) at the center (Figure 4-41) and have no cracks or excessive wear.

Figure 4-41.

Figure 4-42.

Figure 4-40.

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