Functional Check After Repair - WAGNER GM 4700AC Operating Manual

VERSION 06/2014
OPERATING MANUAL
11

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 .
Assembly inspection
Activities
1. Leak test
- Connect 1 bar; 0.1 MPa; 14.50 psi and 8 bar; 0.8 MPa; 116 psi air
pressure to the air connection and product connection.
Place the gun completely into the water bath and check all sealing
points with 1 bar; 0.1 MPa; 14.50 psi and 8 bar; 0.8 MPa; 116 psi for
leaks.
At 8 bar; 0.8 MPa; 116 psi bar, the gun must be completely sealed.
At 1 bar; 0.1 MPa; 14.50 psi, a slight leak can be tolerated: 5 air
bubbles per minute
Injection and fi nal inspection
Activities
2. Trigger lever function test
- The trigger lever must be pulled as far as it will go.
Make sure that the trigger lever can move slightly in its rest position.
- Put the trigger lever locking device into the locking position,
confi gure the air product pressure, and pull the trigger lever.
Neither air nor product may leak or escape.
- Check that the trigger lever locking device is not reset by the trigger
lever when pulling in the locking position.
3. Leak test
- Attach the gun, slowly increase the product pressure in increments
using a suitable medium until the maximum pressure (250 bar,
25 MPa; 3625 psi or 160 bar, 16 MPa; 2320 psi) specifi ed on the type
plate is reached.
- Trigger and fl ush the gun multiple times.
- Make sure that:
- Is the product connection sealed when the gun is closed?
- Is the product valve sealed?
- No product discharge at the valve rod seal?
If product leaks, tighten the sealing screw:
The sealing screw on the valve rod must be tightened.
Tighten the sealing screw with the open-end wrench if necessary.
(In doing so, it is important to make sure that the valve rod still runs
smoothly and the gun closes reliably).
ORDER NUMBER DOC2311730
GM 4700AC
Aid tools
Air connection 1 bar / 8 bar
Water bath
Aid tools
Manual inspection
Visual inspection
The 160 bar variant is
inspected at 160 bar.
250 bar or 160 bar product
connection
Atomizing air 3 bar
Open-end wrench size
SW 7 mm for the sealing
screw
60