Specifications

Technician’s Guide 2-33
3. Remove the 10 (4-40) standoffs (5700-417) which hold the Connector Board to the
Recessed Panel.
4. Carefully remove the Connector Board from the recessed panel.
5. Reverse the previous steps to replace the Connector Board.
2.3.2 AIR SUPPLY ASSEMBLY
OPENING THE AIR SUPPLY BOX
See Engineering Drawing #6105-107 to further illustrate this procedure.
1. Turn PA/4000’s power switch to the OFF position. Shut off the air valve on the
filter assembly.
2. Disconnect all air and electrical connections.
3. Rotate the PA/4000 to a comfortable working position.
4. Open the air box assembly by removing the four buttonhead screws ( 5241-705)
using a 1/8 inch Allen wrench.
5. Remove the air supply cover.
REPLACING THE AIR PRESSURE REGULATORS (1770-078)
See Engineering Drawing #6105-107 to further illustrate this procedure.
1. Remove the Air Supply Cover (6105-256).
2. Turn the black plastic mounting nut (1901-219) to the left to loosen.
3. Remove all air tubing from the Air Regulator you wish to replace.
4. Carefully remove the air regulator assembly.
5. Reverse the previous steps to replace the Air Regulator.
REPLACING THE 24 VDC VALVES
See Engineering Drawing #6105-107 to further illustrate this procedure.
1. Remove the Air Supply Cover (6105-256).
2. Loosen the two 4-40 lock nuts (#18 on Eng. DWG 6105-107) that hold the 24 VDC
valves in place using a 1/4 inch wrench.
3. Slide 24 VDC valve off the thread rod (#5 on Eng. DWG 6105-107).
4. Reverse the previous steps to install the 24 VDC Valves.
REPLACING THE VACUUM FILTER ELEMENT (6105-321)
See Engineering Drawing #6105-107 to further illustrate this procedure.
1. Remove the Air Supply Cover (6105-256).
2. Turn the clear plastic Vacuum Filter Assembly (#29 on Eng. DWG 6105-107) to the
left to loosen.