Step 1Â
REMOVAL OF THE CHAMBER BLOCKS
Remove the upper housing.
Remove the sound absorber.
Step 2
Undo the frame screws and remove the frame cover.
Step 3
Pull out the L-tube from the casing nozzle.
Step 4
Remove the four screws hold the chamber block and the casing block on both side. (4screws on each side)
• Casing block is separated into Casing A (Exhaust part side) and Casing B (Air valve side).
Step 5
Remove one of the U-lock nuts hold the diaphragm mounting block to the rod.
• Use the box driver to loosen (or tighten) the U-lock nut
Step 6
Remove one of the diaphragm mounting blocks from the actuating rod and pull out the other diaphragm mounting block with the rod and finally, separate the diaphragm mounting block and the rod.
• When pulling out the rod, take care not to catch the rod projection on the lever of the SP switch
• If the pump stops automatically, the safety screw must be broken to prevent any further damage to the pump. Be sure all debris is removed from unit.
Step 7
REPLACING THE DIAPHRAGM
In case of replacing the diaphragm mounting block, skip some steps, and move straight from step 12.Â
Remove the diaphragm ring from the diaphragm, and then, the diaphragm from the diaphragm base.
Step 8
Install a new diaphragm and a diaphragm ring in the diaphragm base.
• Take care not to create any clearance between them.
Step 9
REPLACING THE VALVE
In case of replacing the diaphragm mounting block, skip some steps, and move straight from step 12. Remove the valves from the casing B.
• If it is difficult to separate them, insert the tip of a
flatblade screwdriver into the clearance.
• Pull out the valves as they can be removed with facility.
Step 10
Insert each new valve into the center hole of valve seat, and secure them by pulling with the radio pliers.Â
• When reinstalling the valves, make sure they are correctly fitted the exhaust and intake side.
Step 11
Cut away the respective pulling ends with scissors or nippers.
• Leave each of the thick parts.
Step 12
FITTING CHAMBER BLOCKS
Set the actuating rod in line with groove and tighten U-lock nut with the box driver.
• Use new U-lock nut and washer only that come as replacement parts to prevent loosening and causing failure of the pumр.
Step 13
Insert the actuating rod in accordance with the gap of the frame.Â
Secure the diaphragm mounting block on the other side and tighten with washer and U-lock nut with the box driver.Â
Make sure the gaps between the actuating rod and the electromagnet are even.
Step 14
Connect L-tube to the casing block and secure the casing with the screws. (4screws on each side)Â
Install the other casing block at the same way.
Step 15
REPLACEMENT OF SAFETY SCREW
Dispose of broken screw. Be sure all debris is removed from unit as it can result in damage to the permanent magnets and or even in a failure of the pump.
Step 16
Draw the new safety screw through a hole in the different direction of the terminal.
(Threading order : The L-shaped lever-the spring electrode)
Step 17
Fasten screw with a nut.Â
The screw is designed so that the nut will turn freely when it is properly fastened, stop tightening when this happens.
Step 18
This completes the replacement of the safety screw procedure. Make sure the gaps between L-shaped lever and lug of the actuating rod are even.
• When checking the movement of the switch while the power is connected, touching the terminal will result
in an electric shock.
• Unplug the pump immediately after the check.
Step 19
Secure the frame cover with the screws.
Step 20
Install the sound absorber.
Step 21
Place the upper housing back on body.
• Be extremely careful not to pinch the sound absorber in the upper housing.
Secure it with the bolts. Then, place the filter and filter cover on the upper housing.
