12
GM 1-350/530
SERVICE MANUAL
VERSION 02/2015
ORDER NUMBER DOC2355506
3
FUNCTIONAL CHECK AFTER REPAIR
After all repairs, the gun must be checked for safe condition before recommissioning. The
necessary scope of inspection and testing depends on the repair carried out and must be
documented by the repair staff .
Injection and fi nal inspection
Activities
Aid tools
1. Trigger lever function test
-
The trigger lever must be pulled as far as it will go.
Manual inspection
Make sure that the trigger lever can move slightly in its rest position.
-
Put the trigger lever locking device into locking position, confi gure
product pressure and pull the trigger lever.
(Beware of the the recoil; ensure fi rm footing and hold gun tight)
No product may not leak out or escape.
-
Check that the trigger lever locking device is not reset by the trigger
lever when pulling in the locking position.
2. Leak test
-
Connect the spray gun and gradually increase the pressure until the
maximum pressure specifi ed on the type plate has been reached.
Visual inspection
-
Trigger and fl ush the spray gun multiple times.
-
Make sure that:
The product connection is sealed when the spray gun is closed.
The product valve is sealed.
Product does not discharge at the valve rod seal.
350 bar or 530 bar product
connection
3. Flush the spray gun
-
Stop the material supply, open the fl ushing valve, pull the trigger
lever, and fl ush the spray gun or blow it out with air.
Flush the spray gun without nozzle.
-
Close the fl ushing valve. When almost no material is escaping any
longer, remove the product connection hose and blow the rest of the
test medium out of the spray gun using an air gun.
