Gast Linear Series Oilless - Manual (Page 7)

Replacing Head and Diaphragm Assemblies
(DDL40-80, DBP, DBM40-80)
Replacing Head and Diaphragm Assemblies
(DBMX MODELS)
IMPORTANT To open the upper housing, please make sure you
have unplugged the power cord before opening.
1. Loosen the screws around the upper housing,
and take the housing off. (Diagram G)
2. Loosen the four screws and disassemble the parts. (Diagram H)
3. Loosen the u-nut in the center of diaphragm.
4. Take the diaphragm off its place.
5. Replace a new one by mounting the rubber studs
into their position.
6. Press the rim of the diaphragm into the ring.
7. Secure the magnet with a new u-nut and screw and put the
diaphragm housing back with the four screws on.
IMPORTANT To open the upper housing, please make sure you
have unplugged the power cord before opening.
1. Loosen the four screws around the upper housing, and take the housing
off. (Diagram I)
2. Loosen the four screws around the coil cover, and take the cover off.
(Diagram J)
3. Loosen the four screws and disassemble the diaphragm housing.
4. Loosen the u-nut in the center of diaphragm.
5. Take the diaphragm off its place.
6. Replace a new one by mounting the rubber studs into their position.
7. Press the rim of the diaphragm into the ring.
8. Secure the magnet with a new u-nut and screw and put the diaphragm
housing back with the four screws on.
9. Put the coil cover back with the four screws on.
10. Put on the aluminum cover and secure the four screws firmly.
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DIAGRAM G DIAGRAM H
DIAGRAM I DIAGRAM J