Sunrise Medical DeVilbiss 505DZ Service Manual page 37

C O M P O N E N T T E S T I N G , R E P A I R & R E P L A C E M E N T
5. Remove the two hex nuts that secure the mounting plate to the front of the compressor housing (Figure 34). These nuts are
located on each side of the four-way valve.
(compressor mounting plate)
6. Lift compressor and mounting plate up and out of the compressor housing area.
CAUTION—If the unit has been running recently, the compressor may be hot.
To inspect and/or replace internal components (Figure 35):
1. Remove the eight screws that hold the compressor heads in place. When removing the heads, be sure to keep each head and its
components with the correct compressor side.
2. Check for proper placement of or damage to the gaskets on the bottom of the compressor heads. Replace if damaged.
3. Remove reed valve plates. A reed valve is located on each side of the valve plate.
4. The compressor reed valves should be flush with the valve plate. If the valve is broken, not flush with valve plate, or foreign
matter is detected inside the head, clean or replace the compressor reed valve.
Hex nut
(compressor mounting plate)
Figure 34
37
Hex nut