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990242 Rev. A
1) Set the Power Switch to the OFF position and monitor the Air Pressure Gauge to be sure that
the air pressure drops to 0. Allow an additional 5 to 10 seconds after the gauge reading
reaches 0.
2) Remove the front black block from the assembly by removing the two knurled screws.
3) Remove the tube from the fittings and carefully insert the new control valve tube between the
fittings.
4) Insert the new pinch tube and fittings into the bottom block indentation.
NOTE:
Be sure to align the pinch valve’s seam to the side of the block.
5) Carefully replace the front cover. Again making certain that the tube aligns with the
indentations in the top block. Secure the front cover in place with knurled screws, making
sure that the thumb screws are tightened down finger tight.
6) Turn the Power Switch to ON and check for proper operation and leaks.
Air ON/OFF Valve
The Air ON/OFF valve controls the flow of air into the unit. The valve is either open, providing
air flow, or closed, stopping the flow. The valve is not field repairable. Your nearest Welch
Allyn / Kreativ service representative will replace it if it malfunctions.
Air Pressure Gauge. The air pressure gauge is not field repairable and should be replaced with a
new one if it malfunctions or fails to operate.
Exhaust Bottle
The Exhaust Bottles in the
Mach 4.0
and
4.1
collect small amounts of powder each time the
footswitch is released or the system is turned off. Check the amount of powder collected in the
Exhaust Bottle every time you refill the canister with powder. It needs to be emptied when it is
approximately half full.
Summary of Contents for Kreativ Mach 4.0
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