Test Power Supply Resistance; Test Electrode Resistance - Graco Pro Xp 60 WB Instructions Manual

Electrical Tests
5. Be sure the spring (11a) is in place before
reinstalling the power supply.
Figure 16 Test Power Supply Resistance
Test Electrode Electrode Resistance Resistance
Test Test Electrode Resistance
1. Follow the steps under
Prepare the Gun for Service, page
2. Insert a conductive rod (FF) into the gun barrel
(which was removed for the power supply test)
and against the metal contact (DD) in the front
of the barrel.
3. Measure the resistance between the conductive
rod (FF) and the electrode (3). The resistance
should be 10–30 megohms (less than 5 megohms
for Model L60M19).
4. If in range, go to
Electrical Troubleshooting, page
possible causes of poor performance, or contact
your Graco distributor.
5. Remove the electrode (3), see
Electrode Replacement, page
resistance between the contact (HH) and the
electrode wire (GG). The resistance should be
10-30 megohms. If out of range, replace the
electrode.
40
6. Make sure the metal contact ring (DD) in
Figure 17 Test Electrode Resistance
48.
46, for other
Figure 18 Electrode
52. Measure the
Figure 19 Nozzle Conductive O-Ring
the barrel, the nozzle contact ring (4a), and
the electrode contact (HH) are clean and
undamaged.
3A7504A