WAGNER GM 4700AC - 11 FUNCTIONAL CHECK AFTER REPAIR

60
GM 4700AC
OPERATING MANUAL
VERSION 06/2014 ORDER NUMBER DOC2311730
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 sta .
Assembly inspection
Activities Aid tools
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.
Air connection 1 bar / 8 bar
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.
Water bath
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  nal inspection
Activities Aid tools
2. 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 the locking position,
con 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) speci ed on the type
plate is reached.
Visual inspection
- Trigger and  ush the gun multiple times. The 160 bar variant is
inspected at 160 bar.
- 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?
250 bar or 160 bar product
connection
Atomizing air 3 bar
Open-end wrench size
SW 7 mm for the sealing
screw
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).