ENGLISH
E.Blower Belts
1.To gain access to each blower belt compartment, remove the four screws shown in Figure
If access to the blower motors is required, remove the three mounting screws (two on the front of each shroud, one on the rear). Then, lift the end shroud straight up and off its hangers. The end shrouds can only be removed AFTER the rear shrouds have been removed.
2.Check each blower belt for at least 1" (25mm) deflec- tion at the center, and for cracking or excessive wear. See Figure
3.If necessary, adjust the tension of the belt by loosening the four motor mounting bolts. Reposition the motor as necessary until the correct deflection is reached, then tighten the motor mounting bolts.
F.Lubricating the Blower Fan Bearings
1.Use a grease gun to lubricate the main blower fan shaft bearings, as shown in Figure
When lubricating the bearings:
•Use a
•Add the grease slowly until a small bead of grease is present at the seals. AVOID OVERGREASING. Excessive greasing may cause harm to the bearing.
2.Manually turn the blower shaft by pulling on the belt to purge the grease.
3.Wipe off any excess grease on and around the bear- ings.
4.Replace the shrouds onto the oven.
NOTE
The oven will not operate unless ALL of the motor and rear shrouds are in place.
IV. MAINTENANCE - EVERY 6 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.Check for excessive wear on the conveyor drive motor brushes. The brushes should be replaced if they have worn to less than 1/4" (6.4mm) in length. Be sure to replace the brushes in exactly the same position.
C.For gas ovens, clean and inspect the burner nozzle and electrode assembly.
D.Check (and clean, if necessary) the oven venting system.
E.Check the conveyor drive shaft bushings and spacers. Replace the components if they are worn.
Figure 4-8 - Rear Shrouds and Guard Plates
End shroud screws
(3 per shroud - 1
rear, 2 front)
Rear shroud screws | Rear shroud - | End shroud - | |
remove SECOND (if | |||
(4 per shroud for gas | |||
remove FIRST. | necessary). | ||
ovens, 5 per shroud | |||
Access to bearing | Access to blower | ||
for electric ovens) | |||
and fan belt | motor | ||
|
Figure 4-9 - Fan Belt Tension
At least 1" (25mm)
deflection
Fan not shown -
see above
To adjust belt
tension, loosen 4
bolts and
reposition motor
Figure 4-10 - Lubricating the Bearings
Grease fittings
(1 per bearing, 4
total)
20