Airlock - Walinga Grain-Vac 7614F Operator's Manual

5.2 MAINTENANCE (cont'd)

5.2.3 AIRLOCK

The airlock acts as a seal between the
vacuum and pressure sides of the machine
and is located at the bottom of the receiver
tank. As the rotor turns, a pocket is filled with
material when the rotor points upward. As the
pocket rotates, material is moved to the
bottom and is moved into the pressure side of
the system. The material is picked up by the
stream of pressurized air is and moved out of
the discharge piping.
Efficient operation of the airlock requires a
close fit between the tips of the rotor and the
case to maintain a seal between the vacuum
and pressure sides.
When checking or maintaining the airlock,
follow this procedure:
1. Clear the area of bystanders, especially
small children.
2. Disconnect the hydraulic lines from the
tractor to prevent the airlock from
operating.
3. Checking the Tip Clearance:
a. Checking the airlock can be done through
the access door.
b. Use a feeler gauge to check the clearance
between the tip and the case. Inspect
each tip over its entire width.
c. The clearance of the tips must be
maintained at .006in - .008in
Adjust or replace the tips as required to
insure system sealing.
d. Replace any tips that are bent, chipped or
broken.
Blades are reversible if they are
not excessively damaged.
NOTE:
7614F Grain-Vac Operator's Manual 34-100853-6
Fig. 5-26 Airlock
Reset Airlock every 60000
bushels (1600 tonnes)
Fig. 5-27 Checking Tip Clearance Through The
Access Door.
Note:
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