Contractor DBS-25RC, User Manual

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12
ENGLISH
CONTRACOR
®
Version 1.0
5.3. Monthly maintenance
(or after every 160 operation hours).
1. Ensure that the muffler and its pipe are in proper condition.
2. Ensure that there is no leak in all air connections.
6. Troubleshooting.
Choking.
If neither abrasive, nor air comes out of the nozzle, relieve pressure and depressurize
the machine, then ensure that the nozzle is not choked. If only air without any abrasive
comes out of the nozzle, fully open the metering valve, and then quickly close and open
again the lower ball valve of the line. If these actions do not help to relieve the pressure in
the machine, open the inspection door and ensure that there is no foreign matter in the
tank (stones, paper, etc.).
Abrasive surges.
During start-up of the machine abrasive surges are normal to a certain degree.
However id abrasive surges continue, you should stabilize the abrasive flow by quick closing
and opening of the line lower ball valve. Abrasive surges often result from elevated moisture
content in compressed air system. Installation of additional moisture and oil separator can
solve this problem.
Wet abrasive removal.
To remove wet abrasive from machine tank you should disconnect the blasting
hose and remove rubber gaskets at machine hose coupling. Then you must fully open the
metering valve and close the lower ball valve in the machine compressed air line. With such
valve configuration compressed air will only enter the machine tank and press wet abrasive
out of the tank.